PAT を実行し LAN 間 IPSec トンネルを通す IOS ルータの設定例

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Updated: 2008 年 1 月 14 日

Document ID:23820

偏向のない言語

この製品のドキュメントセットは、偏向のない言語を使用するように配慮されています。このドキュメントセットでの偏向のない言語とは、年齢、障害、性別、人種的アイデンティティ、民族的アイデンティティ、性的指向、社会経済的地位、およびインターセクショナリティに基づく差別を意味しない言語として定義されています。製品ソフトウェアのユーザインターフェイスにハードコードされている言語、RFP のドキュメントに基づいて使用されている言語、または参照されているサードパーティ製品で使用されている言語によりドキュメントに例外が存在する場合があります。シスコのインクルーシブランゲージの取り組みの詳細は、こちらをご覧ください。

翻訳について

シスコは世界中のユーザにそれぞれの言語でサポートコンテンツを提供するために、機械と人による翻訳を組み合わせて、本ドキュメントを翻訳しています。ただし、最高度の機械翻訳であっても、専門家による翻訳のような正確性は確保されません。シスコは、これら翻訳の正確性について法的責任を負いません。原典である英語版（リンクからアクセス可能）もあわせて参照することを推奨します。

内容

概要

前提条件

要件

使用するコンポーネント

表記法

設定

ネットワーク図

IPSec NAT 透過を伴う場合の設定

IPSec NAT 透過を伴わない場合の設定

確認

IPSec NAT 透過を伴う場合の確認

IPSec NAT 透過を伴わない場合の確認

トラブルシュート

IPSec NAT 透過を伴う場合のトラブルシューティング

IPSec NAT 透過を伴わない場合のトラブルシューティング

概要

このドキュメントでは、LAN-to-LAN IPSec トンネルの確立が許可されるように Port Address Translation（PAT）を設定するサンプルが紹介されています。ここでは、パブリック IP アドレス（すべてのトラフィック上で PAT を実行するために Cisco IOS® ルータで使用）を 1 つだけ使用し、VPN コンセントレータを使用せずに IPSec トンネルを通過するというシナリオを使用します。

12.2(13)T よりも前の Cisco IOS ソフトウェアリリースが稼働する VPN ゲートウェイでは、カプセル化セキュリティペイロード（ESP）スルーを許可するには、PAT を実行するルータで IPSec パススルー機能が必要です。

注：この機能は、ソフトウェアアドバイザリ（登録ユーザ専用）のIPSec through Network Address Translation(NAT)サポートと呼ばれています。

ローカル（PAT 適用対象）ピアからトンネルを起動するには、設定は必要ありません。リモートピアからトンネルを起動するには、次のコマンドが必要です。

ip nat inside source static esp inside_ip interface interface
ip nat inside source static udp inside_ip 500 interface interface 500

12.2(13)T 以降の Cisco IOS ソフトウェアリリースが稼働する VPN ゲートウェイでは、IPSec トラフィックは User Data Protocol（UDP）ポート 4500 のパケットにカプセル化されます。この機能は IPSec NAT 透過と呼ばれるものです。ローカル（PAT 適用対象）ピアからトンネルを起動するには、設定は必要ありません。

リモートピアからトンネルを起動するには、次のコマンドが必要です。

ip nat inside source static udp inside_ip 4500 interface interface 4500
ip nat inside source static udp inside_ip 500 interface interface 500

IPSec NAT 透過をディセーブルにするには、no crypto ipsec nat-transparency udp-encaps コマンドを発行します。

前提条件

要件

このドキュメントに特有の要件はありません。

使用するコンポーネント

このドキュメントの情報は、Cisco IOS ソフトウェアリリース 12.3(7)T1 に基づくものです。

このドキュメントの情報は、特定のラボ環境にあるデバイスに基づいて作成されました。このドキュメントで使用するすべてのデバイスは、初期（デフォルト）設定の状態から起動しています。対象のネットワークが実稼働中である場合には、どのようなコマンドについても、その潜在的な影響について確実に理解しておく必要があります。

表記法

ドキュメントの表記法の詳細は、「シスコテクニカルティップスの表記法」を参照してください。

設定

このセクションでは、このドキュメントで説明する機能を設定するために必要な情報を提供しています。

ネットワーク図

このドキュメントでは、次のネットワークセットアップを使用します。

IPSec NAT 透過を伴う場合の設定

このドキュメントでは、次の構成を使用します。

VPN-Gateway1
PAT-Router
VPN-Gateway2

VPN-Gateway1
VPN-Gateway1#show running-config Building configuration... Current configuration : 1017 bytes ! version 12.3 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname VPN-Gateway1 ! !--- VPN Gateway1 and VPN Gateway2 can be any devices that !--- perform IPSec. For detailed information on configuring IPSec !--- refer to IPSec Technology Support Information. !--- IPSec configuration between VPN Gateway1 and VPN Gateway2 !--- is beyond the scope of this document. boot-start-marker boot-end-marker ! ! clock timezone EST 0 no aaa new-model ip subnet-zero ! ! ip audit po max-events 100 no ftp-server write-enable ! ! ! ! ! !--- IKE policies (phase 1). crypto isakmp policy 10 authentication pre-share crypto isakmp key cisco123 address 209.165.201.2 ! ! crypto ipsec transform-set basic esp-des esp-md5-hmac ! !--- IPSec policies (phase 1). crypto map mymap 10 ipsec-isakmp set peer 209.165.201.2 set transform-set basic match address 101 ! ! ! interface Ethernet0/0 ip address 192.168.1.1 255.255.255.0 ! interface Serial1/0 ip address 209.165.200.2 255.255.255.252 serial restart-delay 0 crypto map mymap ! ip classless ip route 0.0.0.0 0.0.0.0 209.165.200.1 no ip http server no ip http secure-server ! ! ! access-list 101 permit ip 192.168.1.0 0.0.0.255 172.16.2.0 0.0.0.255 access-list 101 remark Crypto ACL ! ! ! control-plane ! ! line con 0 line aux 0 line vty 0 4 ! ! end

VPN-Gateway1

VPN-Gateway1#show running-config 
Building configuration...

Current configuration : 1017 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname VPN-Gateway1
!


!--- VPN Gateway1 and VPN Gateway2 can be any devices that !--- perform IPSec. For detailed information on configuring IPSec !--- refer to IPSec Technology Support Information. !--- IPSec configuration between VPN Gateway1 and VPN Gateway2 !--- is beyond the scope of this document. 


boot-start-marker
boot-end-marker
!
!
clock timezone EST 0
no aaa new-model
ip subnet-zero
!
!
ip audit po max-events 100
no ftp-server write-enable
!
!
!         
! 
!

!--- IKE policies (phase 1).

crypto isakmp policy 10
 authentication pre-share
crypto isakmp key cisco123 address 209.165.201.2
!
!
crypto ipsec transform-set basic esp-des esp-md5-hmac 
!

!--- IPSec policies (phase 1).

crypto map mymap 10 ipsec-isakmp 
 set peer 209.165.201.2
 set transform-set basic 
 match address 101
!
!
!
interface Ethernet0/0
 ip address 192.168.1.1 255.255.255.0
!
interface Serial1/0
 ip address 209.165.200.2 255.255.255.252
 serial restart-delay 0
 crypto map mymap
!
ip classless
ip route 0.0.0.0 0.0.0.0 209.165.200.1
no ip http server
no ip http secure-server
!
!
!
access-list 101 permit ip 192.168.1.0 0.0.0.255 172.16.2.0 0.0.0.255
access-list 101 remark Crypto ACL
!
!
!
control-plane
!
!
line con 0
line aux 0
line vty 0 4
!
!
end

PAT-Router
PAT-Router#show running-config Building configuration... Current configuration : 971 bytes ! version 12.3 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname PAT-Router ! boot-start-marker boot-end-marker ! ! clock timezone EST 0 no aaa new-model ip subnet-zero ! ! ip audit po max-events 100 no ftp-server write-enable ! ! ! ! no crypto isakmp enable ! ! ! interface Ethernet0/0 ip address 172.16.1.1 255.255.255.0 !--- This declares the interface as inside for NAT purposes. ip nat inside ! interface Serial1/0 ip address 209.165.201.2 255.255.255.224 !--- This declares the interface as !--- outside for NAT purposes. ip nat outside serial restart-delay 0 ! ip classless ip route 0.0.0.0 0.0.0.0 209.165.201.1 ip route 172.16.0.0 255.255.0.0 172.16.1.2 no ip http server no ip http secure-server ! ip nat inside source list 1 interface Serial1/0 overload !--- This allows PAT to be used for regular Internet traffic. ip nat inside source static udp 172.16.1.2 4500 interface Serial1/0 4500 !--- This permits IPSec traffic destined for the Serial1/0 !--- interface to be sent to the inside IP address 172.16.1.2. ip nat inside source static udp 172.16.1.2 500 interface Serial1/0 500 !--- This allows UDP traffic for the Serial1/0 interface to be !--- statically mapped to the inside IP address 172.16.1.2. !--- This is required for the Internet Security Association !--- and Key Management Protocol (ISAKMP) negotiation to be !--- initiated from VPN-Gateway1 to VPN-Gateway2. ! ! access-list 1 permit 172.16.0.0 0.0.255.255 ! ! ! control-plane ! ! line con 0 line aux 0 line vty 0 4 ! ! end

PAT-Router

PAT-Router#show running-config 
Building configuration...

Current configuration : 971 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname PAT-Router
!
boot-start-marker
boot-end-marker
!
!
clock timezone EST 0
no aaa new-model
ip subnet-zero
!
!
ip audit po max-events 100
no ftp-server write-enable
!
!
!         
! 
no crypto isakmp enable
!
!
!
interface Ethernet0/0
 ip address 172.16.1.1 255.255.255.0

!--- This declares the interface as inside for NAT purposes.

 ip nat inside
!
interface Serial1/0
 ip address 209.165.201.2 255.255.255.224

!--- This declares the interface as !--- outside for NAT purposes.

 ip nat outside
 serial restart-delay 0
!
ip classless
ip route 0.0.0.0 0.0.0.0 209.165.201.1
ip route 172.16.0.0 255.255.0.0 172.16.1.2
no ip http server
no ip http secure-server
!
ip nat inside source list 1 interface Serial1/0 overload

!--- This allows PAT to be used for regular Internet traffic. 

ip nat inside source static udp 172.16.1.2 4500 interface Serial1/0 4500

!--- This permits IPSec traffic destined for the Serial1/0 !--- interface to be sent to the inside IP address 172.16.1.2.

ip nat inside source static udp 172.16.1.2 500 interface Serial1/0 500

!--- This allows UDP traffic for the Serial1/0 interface to be !--- statically mapped to the inside IP address 172.16.1.2. !--- This is required for the Internet Security Association !--- and Key Management Protocol (ISAKMP) negotiation to be !--- initiated from VPN-Gateway1 to VPN-Gateway2.

!
!
access-list 1 permit 172.16.0.0 0.0.255.255
!
!
!
control-plane
!
!
line con 0
line aux 0
line vty 0 4
!
!
end

VPN-Gateway2
VPN-Gateway2#show running-config Building configuration... Current configuration : 986 bytes ! version 12.3 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname VPN-Gateway2 ! !--- VPN Gateway1 and VPN Gateway2 can be any devices !--- that perform IPSec. For detailed information on !--- IPSec configuration refer to IPSec Technology Support Information. !--- IPSec configuration between VPN Gateway1 and VPN Gateway2 !--- is beyond the scope of this document. boot-start-marker boot-end-marker ! ! clock timezone EST 0 no aaa new-model ip subnet-zero ! ! ip audit po max-events 100 no ftp-server write-enable ! ! ! ! ! !--- IKE policies (phase 1). crypto isakmp policy 10 authentication pre-share crypto isakmp key cisco123 address 209.165.200.2 ! ! crypto ipsec transform-set basic esp-des esp-md5-hmac ! !--- IPSec policies (phase 1). crypto map mymap 10 ipsec-isakmp set peer 209.165.200.2 set transform-set basic match address 101 ! ! ! interface Ethernet0/0 ip address 172.16.1.2 255.255.255.0 crypto map mymap ! interface Ethernet1/0 ip address 172.16.2.1 255.255.255.0 ! ip classless ip route 0.0.0.0 0.0.0.0 172.16.1.1 no ip http server no ip http secure-server ! ! ! access-list 101 permit ip 172.16.2.0 0.0.0.255 192.168.1.0 0.0.0.255 access-list 101 remark Crypto ACL ! ! ! control-plane ! ! line con 0 line aux 0 line vty 0 4 ! ! end

VPN-Gateway2

VPN-Gateway2#show running-config
Building configuration...

Current configuration : 986 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname VPN-Gateway2
!


!--- VPN Gateway1 and VPN Gateway2 can be any devices !--- that perform IPSec. For detailed information on !--- IPSec configuration refer to IPSec Technology Support Information. !--- IPSec configuration between VPN Gateway1 and VPN Gateway2 !--- is beyond the scope of this document. 


boot-start-marker
boot-end-marker
!
!
clock timezone EST 0
no aaa new-model
ip subnet-zero
!
!
ip audit po max-events 100
no ftp-server write-enable
!
!
!         
! 
!

!--- IKE policies (phase 1).

crypto isakmp policy 10
 authentication pre-share
crypto isakmp key cisco123 address 209.165.200.2
!
!
crypto ipsec transform-set basic esp-des esp-md5-hmac 
!

!--- IPSec policies (phase 1).

crypto map mymap 10 ipsec-isakmp 
 set peer 209.165.200.2
 set transform-set basic 
 match address 101
!
!
!
interface Ethernet0/0
 ip address 172.16.1.2 255.255.255.0
 crypto map mymap
!
interface Ethernet1/0
 ip address 172.16.2.1 255.255.255.0
!         
ip classless
ip route 0.0.0.0 0.0.0.0 172.16.1.1
no ip http server
no ip http secure-server
!
!
!
access-list 101 permit ip 172.16.2.0 0.0.0.255 192.168.1.0 0.0.0.255
access-list 101 remark Crypto ACL
!
!
!
control-plane
!
!
line con 0
line aux 0
line vty 0 4
!
!
end

VPN-Gateway1
VPN-Gateway1#show running-config Building configuration... Current configuration : 1017 bytes ! version 12.3 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname VPN-Gateway1 ! !--- VPN Gateway1 and VPN Gateway2 can be any devices !--- that perform IPSec. For detailed information on !--- IPSec configuration refer to IPSec Technology Support Information. !--- IPSec configuration between VPN Gateway1 and VPN Gateway2 !--- is beyond the scope of this document. boot-start-marker boot-end-marker ! ! clock timezone EST 0 no aaa new-model ip subnet-zero ! ! ip audit po max-events 100 no ftp-server write-enable ! ! ! ! ! !--- IKE policies (phase 1). crypto isakmp policy 10 authentication pre-share crypto isakmp key cisco123 address 209.165.201.2 ! ! crypto ipsec transform-set basic esp-des esp-md5-hmac ! !--- IPSec policies (phase 1). crypto map mymap 10 ipsec-isakmp set peer 209.165.201.2 set transform-set basic match address 101 ! ! ! interface Ethernet0/0 ip address 192.168.1.1 255.255.255.0 ! interface Serial1/0 ip address 209.165.200.2 255.255.255.252 serial restart-delay 0 crypto map mymap ! ip classless ip route 0.0.0.0 0.0.0.0 209.165.200.1 no ip http server no ip http secure-server ! ! ! access-list 101 permit ip 192.168.1.0 0.0.0.255 172.16.2.0 0.0.0.255 access-list 101 remark Crypto ACL ! ! ! control-plane ! ! line con 0 line aux 0 line vty 0 4 ! ! end

VPN-Gateway1

VPN-Gateway1#show running-config 
Building configuration...

Current configuration : 1017 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname VPN-Gateway1
!


!--- VPN Gateway1 and VPN Gateway2 can be any devices !--- that perform IPSec. For detailed information on !--- IPSec configuration refer to IPSec Technology Support Information. !--- IPSec configuration between VPN Gateway1 and VPN Gateway2 !--- is beyond the scope of this document. 


boot-start-marker
boot-end-marker
!
!
clock timezone EST 0
no aaa new-model
ip subnet-zero
!
!
ip audit po max-events 100
no ftp-server write-enable
!
!
!         
! 
!

!--- IKE policies (phase 1).

crypto isakmp policy 10
 authentication pre-share
crypto isakmp key cisco123 address 209.165.201.2
!
!
crypto ipsec transform-set basic esp-des esp-md5-hmac 
!

!--- IPSec policies (phase 1).

crypto map mymap 10 ipsec-isakmp 
 set peer 209.165.201.2
 set transform-set basic 
 match address 101
!
!
!
interface Ethernet0/0
 ip address 192.168.1.1 255.255.255.0
!
interface Serial1/0
 ip address 209.165.200.2 255.255.255.252
 serial restart-delay 0
 crypto map mymap
!
ip classless
ip route 0.0.0.0 0.0.0.0 209.165.200.1
no ip http server
no ip http secure-server
!
!
!
access-list 101 permit ip 192.168.1.0 0.0.0.255 172.16.2.0 0.0.0.255
access-list 101 remark Crypto ACL
!
!
!
control-plane
!
!
line con 0
line aux 0
line vty 0 4
!
!
end

PAT-Router
PAT-Router#show running-config Building configuration... Current configuration : 971 bytes ! version 12.3 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname PAT-Router ! boot-start-marker boot-end-marker ! ! clock timezone EST 0 no aaa new-model ip subnet-zero ! ! ip audit po max-events 100 no ftp-server write-enable ! ! ! ! no crypto isakmp enable ! ! ! interface Ethernet0/0 ip address 172.16.1.1 255.255.255.0 !--- This declares the interface as inside for NAT purposes. ip nat inside ! interface Serial1/0 ip address 209.165.201.2 255.255.255.224 !--- This declares the interface as !--- outside for NAT purposes. ip nat outside serial restart-delay 0 ! ip classless ip route 0.0.0.0 0.0.0.0 209.165.201.1 ip route 172.16.0.0 255.255.0.0 172.16.1.2 no ip http server no ip http secure-server ! ip nat inside source list 1 interface Serial1/0 overload !--- This allows PAT to be used for regular Internet traffic. ip nat inside source static esp 172.16.1.2 interface Serial1/0 !--- This permits the IPSec ESP tunnel mode !--- destined for the Serial1/0 interface to be sent !--- to the inside IP address 172.16.1.2. The "esp" !--- option allows a single ESP tunnel-mode !--- VPN setup to be possible. ip nat inside source static udp 172.16.1.2 500 interface Serial1/0 500 !--- This allows UDP traffic for the Serial1/0 !--- interface to be statically mapped to the inside !--- IP address 172.16.1.2. This is required !--- for the ISAKMP negotiation to be initiated !--- from VPN-Gateway1 to VPN-Gateway2. ! ! access-list 1 permit 172.16.0.0 0.0.255.255 ! ! ! control-plane ! ! line con 0 line aux 0 line vty 0 4 ! ! end

PAT-Router

PAT-Router#show running-config 
Building configuration...

Current configuration : 971 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname PAT-Router
!
boot-start-marker
boot-end-marker
!
!
clock timezone EST 0
no aaa new-model
ip subnet-zero
!
!
ip audit po max-events 100
no ftp-server write-enable
!
!
!         
! 
no crypto isakmp enable
!
!
!
interface Ethernet0/0
 ip address 172.16.1.1 255.255.255.0

!--- This declares the interface as inside for NAT purposes.

 ip nat inside
!
interface Serial1/0
 ip address 209.165.201.2 255.255.255.224

!--- This declares the interface as !--- outside for NAT purposes.

 ip nat outside
 serial restart-delay 0
!
ip classless
ip route 0.0.0.0 0.0.0.0 209.165.201.1
ip route 172.16.0.0 255.255.0.0 172.16.1.2
no ip http server
no ip http secure-server
!
ip nat inside source list 1 interface Serial1/0 overload

!--- This allows PAT to be used for regular Internet traffic.
 
ip nat inside source static esp 172.16.1.2 interface Serial1/0

!--- This permits the IPSec ESP tunnel mode !--- destined for the Serial1/0 interface to be sent !--- to the inside IP address 172.16.1.2. The "esp" !--- option allows a single ESP tunnel-mode !--- VPN setup to be possible.

ip nat inside source static udp 172.16.1.2 500 interface Serial1/0 500

!--- This allows UDP traffic for the Serial1/0 !--- interface to be statically mapped to the inside !--- IP address 172.16.1.2. This is required !--- for the ISAKMP negotiation to be initiated !--- from VPN-Gateway1 to VPN-Gateway2.

!
!
access-list 1 permit 172.16.0.0 0.0.255.255
!
!
!
control-plane
!
!
line con 0
line aux 0
line vty 0 4
!
!
end

VPN-Gateway2
VPN-Gateway2#show running-config Building configuration... Current configuration : 986 bytes ! version 12.3 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname VPN-Gateway2 ! !--- VPN Gateway1 and VPN Gateway2 can be any devices !--- that perform IPSec. For detailed information on !--- IPSec configuration refer to IPSec Technology Support Information. !--- IPSec configuration between VPN Gateway1 and VPN Gateway2 !--- is beyond the scope of this document. boot-start-marker boot-end-marker ! ! clock timezone EST 0 no aaa new-model ip subnet-zero ! ! ip audit po max-events 100 no ftp-server write-enable ! ! ! ! ! !--- IKE policies (phase 1). crypto isakmp policy 10 authentication pre-share crypto isakmp key cisco123 address 209.165.200.2 ! ! crypto ipsec transform-set basic esp-des esp-md5-hmac no crypto ipsec nat-transparency udp-encaps ! !--- IPSec policies (phase 1). crypto map mymap 10 ipsec-isakmp set peer 209.165.200.2 set transform-set basic match address 101 ! ! ! interface Ethernet0/0 ip address 172.16.1.2 255.255.255.0 crypto map mymap ! interface Ethernet1/0 ip address 172.16.2.1 255.255.255.0 ! ip classless ip route 0.0.0.0 0.0.0.0 172.16.1.1 no ip http server no ip http secure-server ! ! ! access-list 101 permit ip 172.16.2.0 0.0.0.255 192.168.1.0 0.0.0.255 access-list 101 remark Crypto ACL ! ! ! control-plane ! ! line con 0 line aux 0 line vty 0 4 ! ! end

VPN-Gateway2

VPN-Gateway2#show running-config
Building configuration...

Current configuration : 986 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname VPN-Gateway2
!


!--- VPN Gateway1 and VPN Gateway2 can be any devices !--- that perform IPSec. For detailed information on !--- IPSec configuration refer to IPSec Technology Support Information. !--- IPSec configuration between VPN Gateway1 and VPN Gateway2 !--- is beyond the scope of this document. 


boot-start-marker
boot-end-marker
!
!
clock timezone EST 0
no aaa new-model
ip subnet-zero
!
!
ip audit po max-events 100
no ftp-server write-enable
!
!
!         
! 
!

!--- IKE policies (phase 1).

crypto isakmp policy 10
 authentication pre-share
crypto isakmp key cisco123 address 209.165.200.2
!
!
crypto ipsec transform-set basic esp-des esp-md5-hmac
no crypto ipsec nat-transparency udp-encaps 
!

!--- IPSec policies (phase 1).

crypto map mymap 10 ipsec-isakmp 
 set peer 209.165.200.2
 set transform-set basic 
 match address 101
!
!
!
interface Ethernet0/0
 ip address 172.16.1.2 255.255.255.0
 crypto map mymap
!
interface Ethernet1/0
 ip address 172.16.2.1 255.255.255.0
!         
ip classless
ip route 0.0.0.0 0.0.0.0 172.16.1.1
no ip http server
no ip http secure-server
!
!
!
access-list 101 permit ip 172.16.2.0 0.0.0.255 192.168.1.0 0.0.0.255
access-list 101 remark Crypto ACL
!
!
!
control-plane
!
!
line con 0
line aux 0
line vty 0 4
!
!
end

確認

このセクションでは、設定が正しく動作していることを確認するための情報を提供しています。

一部の show コマンドはアウトプットインタープリタツールによってサポートされています（登録ユーザ専用）。このツールを使用することによって、show コマンド出力の分析結果を表示できます。

IPSec NAT 透過を伴う場合の確認
IPSec NAT 透過を伴わない場合の確認

IPSec NAT 透過を伴う場合の確認

show crypto isakmp sa：ピアにおける現在のインターネット鍵交換（IKE）セキュリティアソシエーション（SA）をすべて表示します。

VPN-Gateway1#show crypto isakmp sa
dst             src             state          conn-id slot
209.165.200.2   209.165.201.2   QM_IDLE              1    0


VPN-Gateway2#show crypto isakmp sa
dst             src             state          conn-id slot
209.165.200.2   172.16.1.2      QM_IDLE              1    0

show crypto ipsec sa：ピア間に構築された IPSec SA を表示します。

VPN-Gateway1#show crypto ipsec sa

 
!--- This command is issued after a ping !--- is attempted from PC2 to PC1.


interface: Serial1/0
    Crypto map tag: mymap, local addr. 209.165.200.2

   protected vrf: 
   local  ident (addr/mask/prot/port): (192.168.1.0/255.255.255.0/0/0)
   remote ident (addr/mask/prot/port): (172.16.2.0/255.255.255.0/0/0)
   current_peer: 209.165.201.2:4500
     PERMIT, flags={origin_is_acl,}
    #pkts encaps: 6, #pkts encrypt: 6, #pkts digest: 6
    #pkts decaps: 6, #pkts decrypt: 6, #pkts verify: 6
    #pkts compressed: 0, #pkts decompressed: 0
    #pkts not compressed: 0, #pkts compr. failed: 0
    #pkts not decompressed: 0, #pkts decompress failed: 0
    #send errors 0, #recv errors 0

     local crypto endpt.: 209.165.200.2, remote crypto endpt.: 209.165.201.2
     path mtu 1500, media mtu 1500
     current outbound spi: 9CCA0619

     inbound esp sas:
      spi: 0x4E6B990F(1315674383)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Tunnel UDP-Encaps, }
        slot: 0, conn id: 2000, flow_id: 5, crypto map: mymap
        crypto engine type: Software, engine_id: 1
        sa timing: remaining key lifetime (k/sec): (4602622/3489)
        ike_cookies: 8973C578 9C7DEB45 5C9BE6DC 7F737D09
        IV size: 8 bytes
        replay detection support: Y

     inbound ah sas:

     inbound pcp sas:

     outbound esp sas:
      spi: 0x9CCA0619(2630485529)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Tunnel UDP-Encaps, }
        slot: 0, conn id: 2001, flow_id: 6, crypto map: mymap
        crypto engine type: Software, engine_id: 1
        sa timing: remaining key lifetime (k/sec): (4602622/3489)
        ike_cookies: 8973C578 9C7DEB45 5C9BE6DC 7F737D09
        IV size: 8 bytes
        replay detection support: Y

     outbound ah sas:

     outbound pcp sas:


VPN-Gateway2#show crypto ipsec sa

 
!--- This command is issued after a ping !--- is attempted from PC2 to PC1.


interface: Ethernet0/0
    Crypto map tag: mymap, local addr. 172.16.1.2

   protected vrf: 
   local  ident (addr/mask/prot/port): (172.16.2.0/255.255.255.0/0/0)
   remote ident (addr/mask/prot/port): (192.168.1.0/255.255.255.0/0/0)
   current_peer: 209.165.200.2:4500
     PERMIT, flags={origin_is_acl,}
    #pkts encaps: 23, #pkts encrypt: 23, #pkts digest: 23
    #pkts decaps: 16, #pkts decrypt: 16, #pkts verify: 16
    #pkts compressed: 0, #pkts decompressed: 0
    #pkts not compressed: 0, #pkts compr. failed: 0
    #pkts not decompressed: 0, #pkts decompress failed: 0
    #send errors 7, #recv errors 0

     local crypto endpt.: 172.16.1.2, remote crypto endpt.: 209.165.200.2
     path mtu 1500, media mtu 1500
     current outbound spi: 4E6B990F

     inbound esp sas:
      spi: 0x9CCA0619(2630485529)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Tunnel UDP-Encaps, }
        slot: 0, conn id: 2000, flow_id: 1, crypto map: mymap
        crypto engine type: Software, engine_id: 1
        sa timing: remaining key lifetime (k/sec): (4384024/3481)
        ike_cookies: 5C9BE6DC 7F737D09 8973C578 9C7DEB45
        IV size: 8 bytes
        replay detection support: Y

     inbound ah sas:

     inbound pcp sas:

     outbound esp sas:
      spi: 0x4E6B990F(1315674383)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Tunnel UDP-Encaps, }
        slot: 0, conn id: 2001, flow_id: 2, crypto map: mymap
        crypto engine type: Software, engine_id: 1
        sa timing: remaining key lifetime (k/sec): (4384024/3481)
        ike_cookies: 5C9BE6DC 7F737D09 8973C578 9C7DEB45
        IV size: 8 bytes
        replay detection support: Y

     outbound ah sas:

     outbound pcp sas:

show ip nat translations：アクティブな NAT 変換を表示します。

PAT-Router#show ip nat translations
Pro Inside global      Inside local       Outside local      Outside global
udp 209.165.201.2:500  172.16.1.2:500     ---                ---
udp 209.165.201.2:4500 172.16.1.2:4500    ---                ---

IPSec NAT 透過を伴わない場合の確認

show crypto isakmp sa：現在ピアにあるすべての IKE SA を表示します。

VPN-Gateway1#show crypto isakmp sa
dst             src             state          conn-id slot
209.165.200.2   209.165.201.2   QM_IDLE              1    0


VPN-Gateway2#show crypto isakmp sa
dst             src             state          conn-id slot
209.165.200.2   172.16.1.2      QM_IDLE              1    0

show crypto ipsec sa：ピア間に構築された IPSec SA を表示します。

VPN-Gateway1#show crypto ipsec sa

 
!--- This command is issued after a ping !--- is attempted from PC2 to PC1.


interface: Serial1/0
    Crypto map tag: mymap, local addr. 209.165.200.2

   protected vrf: 
   local  ident (addr/mask/prot/port): (192.168.1.0/255.255.255.0/0/0)
   remote ident (addr/mask/prot/port): (172.16.2.0/255.255.255.0/0/0)
   current_peer: 209.165.201.2:500
     PERMIT, flags={origin_is_acl,}
    #pkts encaps: 21, #pkts encrypt: 21, #pkts digest: 21
    #pkts decaps: 15, #pkts decrypt: 15, #pkts verify: 15
    #pkts compressed: 0, #pkts decompressed: 0
    #pkts not compressed: 0, #pkts compr. failed: 0
    #pkts not decompressed: 0, #pkts decompress failed: 0
    #send errors 4, #recv errors 0

     local crypto endpt.: 209.165.200.2, remote crypto endpt.: 209.165.201.2
     path mtu 1500, media mtu 1500
     current outbound spi: E89A0245

     inbound esp sas:
      spi: 0xB5F867BC(3052955580)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Tunnel, }
        slot: 0, conn id: 2000, flow_id: 7, crypto map: mymap
        crypto engine type: Software, engine_id: 1
        sa timing: remaining key lifetime (k/sec): (4538665/3553)
        ike_cookies: 8973C578 DD91CB42 5C9BE6DC 63813771
        IV size: 8 bytes
        replay detection support: Y

     inbound ah sas:

     inbound pcp sas:

     outbound esp sas:
      spi: 0xE89A0245(3902407237)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Tunnel, }
        slot: 0, conn id: 2001, flow_id: 8, crypto map: mymap
        crypto engine type: Software, engine_id: 1
        sa timing: remaining key lifetime (k/sec): (4538665/3553)
        ike_cookies: 8973C578 DD91CB42 5C9BE6DC 63813771
        IV size: 8 bytes
        replay detection support: Y

     outbound ah sas:

     outbound pcp sas:


VPN-Gateway2#show crypto ipsec sa

 
!--- This command is issued after a ping !--- is attempted from PC2 to PC1.


interface: Ethernet0/0
    Crypto map tag: mymap, local addr. 172.16.1.2

   protected vrf: 
   local  ident (addr/mask/prot/port): (172.16.2.0/255.255.255.0/0/0)
   remote ident (addr/mask/prot/port): (192.168.1.0/255.255.255.0/0/0)
   current_peer: 209.165.200.2:500
     PERMIT, flags={origin_is_acl,}
    #pkts encaps: 5, #pkts encrypt: 5, #pkts digest: 5
    #pkts decaps: 5, #pkts decrypt: 5, #pkts verify: 5
    #pkts compressed: 0, #pkts decompressed: 0
    #pkts not compressed: 0, #pkts compr. failed: 0
    #pkts not decompressed: 0, #pkts decompress failed: 0
    #send errors 1, #recv errors 0

     local crypto endpt.: 172.16.1.2, remote crypto endpt.: 209.165.200.2
     path mtu 1500, media mtu 1500
     current outbound spi: B5F867BC

     inbound esp sas:
      spi: 0xE89A0245(3902407237)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Tunnel, }
        slot: 0, conn id: 2000, flow_id: 3, crypto map: mymap
        crypto engine type: Software, engine_id: 1
        sa timing: remaining key lifetime (k/sec): (4572084/3561)
        ike_cookies: 5C9BE6DC 63813771 8973C578 DD91CB42
        IV size: 8 bytes
        replay detection support: Y

     inbound ah sas:

     inbound pcp sas:

     outbound esp sas:
      spi: 0xB5F867BC(3052955580)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Tunnel, }
        slot: 0, conn id: 2001, flow_id: 4, crypto map: mymap
        crypto engine type: Software, engine_id: 1
        sa timing: remaining key lifetime (k/sec): (4572084/3561)
        ike_cookies: 5C9BE6DC 63813771 8973C578 DD91CB42
        IV size: 8 bytes
        replay detection support: Y

     outbound ah sas:

     outbound pcp sas:

show ip nat translations：アクティブな NAT 変換を表示します。

PAT-Router#show ip nat translations
Pro Inside global      Inside local       Outside local      Outside global
udp 209.165.201.2:500  172.16.1.2:500     ---                ---
esp 209.165.201.2:0    172.16.1.2:0       ---                ---

トラブルシュート

ここでは、設定のトラブルシューティングに使用できる情報を示します。

PAT を取り込んだ LAN-to-LAN IPSec トンネルをこのドキュメントの説明どおりに設定しても問題が起こる場合は、Cisco テクニカルサポートによる分析用に、各デバイスの debug 出力と show コマンドの出力を収集してください。

この設定に関連するトラブルシューティング情報を次に示します。トラブルシューティングについての詳細は、『IP Securityのトラブルシューティング – debugコマンドの理解と使用』および『NATの動作確認と基本的なNATのトラブルシューティング』を参照してください。

debug コマンドとサンプル出力が、このセクションで示されています。

IPSec NAT 透過を伴う場合のトラブルシューティング
IPSec NAT 透過を伴わない場合のトラブルシューティング

注：debugコマンドを発行する前に、『debugコマンドの重要な情報』を参照してください。

IPSec NAT 透過を伴う場合のトラブルシューティング

debug crypto ipsec：フェーズ 2 の IPsec ネゴシエーションを表示します。
debug crypto isakmp：フェーズ 1 の ISAKMP ネゴシエーションを表示します。
debug ip nat detail：ルータで実行中の NAT を検証します。

次に、サンプルのコマンド出力を示します。

VPN-Gateway1#debug crypto ipsec
Crypto IPSEC debugging is on
VPN-Gateway1#debug crypto isakmp
Crypto ISAKMP debugging is on
VPN-Gateway1#show debug
Cryptographic Subsystem:
  Crypto ISAKMP debugging is on
  Crypto IPSEC debugging is on

 
!--- These debugs appeared after a ping !--- was attempted from PC2 to PC1.


*Jun 27 09:31:36.159: ISAKMP (0:0): received packet from 209.165.201.2 
                                    dport 500 sport 500 Global (N) NEW SA
*Jun 27 09:31:36.159: ISAKMP: Created a peer struct for 209.165.201.2, 
                              peer port 500
*Jun 27 09:31:36.159: ISAKMP: Locking peer struct 0x2C50610, IKE refcount 
                              1 for crypto_isakmp_process_block
*Jun 27 09:31:36.159: ISAKMP: local port 500, remote port 500
*Jun 27 09:31:36.559: insert sa successfully sa = 290B720
*Jun 27 09:31:36.559: ISAKMP:(0:1:SW:1):Input = IKE_MESG_FROM_PEER, 
                                        IKE_MM_EXCH
*Jun 27 09:31:36.559: ISAKMP:(0:1:SW:1):Old State = IKE_READY  
                                        New State = IKE_R_MM1 

*Jun 27 09:31:36.619: ISAKMP:(0:1:SW:1): processing SA payload. message ID = 0
*Jun 27 09:31:36.619: ISAKMP:(0:1:SW:1): processing vendor id payload
*Jun 27 09:31:36.619: ISAKMP:(0:1:SW:1): vendor ID seems Unity/DPD but 
                                         major 157 mismatch
*Jun 27 09:31:36.619: ISAKMP:(0:1:SW:1): vendor ID is NAT-T v3
*Jun 27 09:31:36.619: ISAKMP:(0:1:SW:1): processing vendor id payload
*Jun 27 09:31:36.619: ISAKMP:(0:1:SW:1): vendor ID seems Unity/DPD but major 
                                         123 mismatch
*Jun 27 09:31:36.619: ISAKMP:(0:1:SW:1): vendor ID is NAT-T v2
*Jun 27 09:31:36.619: ISAKMP: Looking for a matching key for 209.165.201.2 
                              in default : success
*Jun 27 09:31:36.619: ISAKMP:(0:1:SW:1):found peer pre-shared key matching 
                                        209.165.201.2
*Jun 27 09:31:36.619: ISAKMP:(0:1:SW:1): local preshared key found
*Jun 27 09:31:36.619: ISAKMP : Scanning profiles for xauth ...
*Jun 27 09:31:36.619: ISAKMP:(0:1:SW:1):Checking ISAKMP transform 1 against 
                                       priority 10 policy
*Jun 27 09:31:36.619: ISAKMP:      encryption DES-CBC
*Jun 27 09:31:36.619: ISAKMP:      hash SHA
*Jun 27 09:31:36.619: ISAKMP:      default group 1
*Jun 27 09:31:36.619: ISAKMP:      auth pre-share
*Jun 27 09:31:36.619: ISAKMP:      life type in seconds
*Jun 27 09:31:36.619: ISAKMP:      life duration (VPI) of  0x0 0x1 0x51 0x80 
*Jun 27 09:31:36.619: ISAKMP:(0:1:SW:1):atts are acceptable. Next payload is 0
*Jun 27 09:31:36.619: ISAKMP:(0:1:SW:1): processing vendor id payload
*Jun 27 09:31:36.619: ISAKMP:(0:1:SW:1): vendor ID seems Unity/DPD but major 
                                         157 mismatch
*Jun 27 09:31:36.619: ISAKMP:(0:1:SW:1): vendor ID is NAT-T v3
*Jun 27 09:31:36.619: ISAKMP:(0:1:SW:1): processing vendor id payload
*Jun 27 09:31:36.619: ISAKMP:(0:1:SW:1): vendor ID seems Unity/DPD but 
                                         major 123 mismatch
*Jun 27 09:31:36.619: ISAKMP:(0:1:SW:1): vendor ID is NAT-T v2
*Jun 27 09:31:36.619: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                                        IKE_PROCESS_MAIN_MODE
*Jun 27 09:31:36.619: ISAKMP:(0:1:SW:1):Old State = IKE_R_MM1  
                                        New State = IKE_R_MM1 

*Jun 27 09:31:36.771: ISAKMP:(0:1:SW:1): constructed NAT-T vendor-03 ID
*Jun 27 09:31:36.771: ISAKMP:(0:1:SW:1): sending packet to 209.165.201.2 
                                         my_port 500 peer_port 500 (R) MM_SA_SETUP
*Jun 27 09:31:36.771: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                                        IKE_PROCESS_COMPLETE
*Jun 27 09:31:36.771: ISAKMP:(0:1:SW:1):Old State = IKE_R_MM1  
                                        New State = IKE_R_MM2 

*Jun 27 09:31:37.179: ISAKMP (0:134217729): received packet from 
                                            209.165.201.2 dport 500 sport 500 
                                            Global (R) MM_SA_SETUP
*Jun 27 09:31:37.179: ISAKMP:(0:1:SW:1):Input = IKE_MESG_FROM_PEER, IKE_MM_EXCH
*Jun 27 09:31:37.179: ISAKMP:(0:1:SW:1):Old State = IKE_R_MM2  New State = IKE_R_MM3 

*Jun 27 09:31:38.199: ISAKMP:(0:1:SW:1): processing KE payload. 
                                         message ID = 0
*Jun 27 09:31:38.199: ISAKMP:(0:1:SW:1): processing NONCE payload. message ID = 0
*Jun 27 09:31:38.759: ISAKMP: Looking for a matching key for 209.165.201.2 
                              in default : success
*Jun 27 09:31:38.759: ISAKMP:(0:1:SW:1):found peer pre-shared key matching 
                                         209.165.201.2
*Jun 27 09:31:38.759: ISAKMP:(0:1:SW:1):SKEYID state generated
*Jun 27 09:31:38.759: ISAKMP:(0:1:SW:1): processing vendor id payload
*Jun 27 09:31:38.759: ISAKMP:(0:1:SW:1): vendor ID is Unity
*Jun 27 09:31:38.759: ISAKMP:(0:1:SW:1): processing vendor id payload
*Jun 27 09:31:38.759: ISAKMP:(0:1:SW:1): vendor ID is DPD
*Jun 27 09:31:38.759: ISAKMP:(0:1:SW:1): processing vendor id payload
*Jun 27 09:31:38.759: ISAKMP:(0:1:SW:1): speaking to another IOS box!
*Jun 27 09:31:38.759: ISAKMP:received payload type 17
*Jun 27 09:31:38.759: ISAKMP:received payload type 17
*Jun 27 09:31:38.759: ISAKMP (0:134217729): NAT found, the node outside NAT
*Jun 27 09:31:38.759: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                                IKE_PROCESS_MAIN_MODE
*Jun 27 09:31:38.759: ISAKMP:(0:1:SW:1):Old State = IKE_R_MM3  
                             New State = IKE_R_MM3 

*Jun 27 09:31:38.891: ISAKMP:(0:1:SW:1): sending packet to 209.165.201.2 
                               my_port 500 peer_port 500 (R) MM_KEY_EXCH
*Jun 27 09:31:38.891: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                               IKE_PROCESS_COMPLETE
*Jun 27 09:31:38.891: ISAKMP:(0:1:SW:1):Old State = IKE_R_MM3  
                              New State = IKE_R_MM4 

*Jun 27 09:31:40.071: ISAKMP (0:134217729): received packet from 
                             209.165.201.2 dport 4500 sport 4500 Global 
                            (R) MM_KEY_EXCH
*Jun 27 09:31:40.071: ISAKMP:(0:1:SW:1):Input = IKE_MESG_FROM_PEER, 
                             IKE_MM_EXCH
*Jun 27 09:31:40.071: ISAKMP:(0:1:SW:1):Old State = IKE_R_MM4  
                              New State = IKE_R_MM5 

*Jun 27 09:31:40.199: ISAKMP:(0:1:SW:1): processing ID payload. message ID = 0
*Jun 27 09:31:40.199: ISAKMP (0:134217729): ID payload 
        next-payload : 8
        type         : 1 
        address      : 172.16.1.2 
        protocol     : 17 
        port         : 0 
        length       : 12
*Jun 27 09:31:40.199: ISAKMP:(0:1:SW:1):: peer matches *none* of the profiles
*Jun 27 09:31:40.199: ISAKMP:(0:1:SW:1): processing HASH payload. message ID = 0
*Jun 27 09:31:40.199: ISAKMP:(0:1:SW:1): processing NOTIFY INITIAL_CONTACT 
                             protocol 1
        spi 0, message ID = 0, sa = 290B720
*Jun 27 09:31:40.199: ISAKMP:(0:1:SW:1):SA authentication status:
        authenticated
*Jun 27 09:31:40.199: ISAKMP:(0:1:SW:1): Process initial contact,
                          bring down existing phase 1 and 2 SA's with 
                         local 209.165.200.2 
                         remote 209.165.201.2 remote port 4500
*Jun 27 09:31:40.231: IPSEC(key_engine): got a queue event with 1 kei messages
*Jun 27 09:31:40.399: ISAKMP:(0:1:SW:1):SA authentication status:
        authenticated
*Jun 27 09:31:40.399: ISAKMP:(0:1:SW:1):SA has been authenticated 
                             with 209.165.201.2
*Jun 27 09:31:40.399: ISAKMP:(0:1:SW:1):Detected port floating to 
                             port = 4500
*Jun 27 09:31:40.399: ISAKMP: Trying to insert a peer 
                            209.165.200.2/209.165.201.2/4500/,  
                             and inserted successfully.
*Jun 27 09:31:40.399: ISAKMP:(0:1:SW:1):: peer matches *none* of the profiles
*Jun 27 09:31:40.399: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                       IKE_PROCESS_MAIN_MODE
*Jun 27 09:31:40.399: ISAKMP:(0:1:SW:1):Old State = IKE_R_MM5  
                        New State = IKE_R_MM5 

*Jun 27 09:31:40.459: ISAKMP:(0:1:SW:1):SA is doing pre-shared key 
                       authentication using id type ID_IPV4_ADDR
*Jun 27 09:31:40.459: ISAKMP (0:134217729): ID payload 
        next-payload : 8
        type         : 1 
        address      : 209.165.200.2 
        protocol     : 17 
        port         : 0 
        length       : 12
*Jun 27 09:31:40.459: ISAKMP:(0:1:SW:1):Total payload length: 12
*Jun 27 09:31:40.459: ISAKMP:(0:1:SW:1): sending packet to 209.165.201.2 
                      my_port 4500 peer_port 4500 (R) MM_KEY_EXCH
*Jun 27 09:31:40.459: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                       IKE_PROCESS_COMPLETE
*Jun 27 09:31:40.459: ISAKMP:(0:1:SW:1):Old State = IKE_R_MM5  
                      New State = IKE_P1_COMPLETE 

*Jun 27 09:31:40.539: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                      IKE_PHASE1_COMPLETE
*Jun 27 09:31:40.539: ISAKMP:(0:1:SW:1):Old State = IKE_P1_COMPLETE  
                      New State = IKE_P1_COMPLETE 

*Jun 27 09:31:40.999: ISAKMP (0:134217729): received packet from 209.165.201.2 
                      dport 4500 sport 4500 Global (R) QM_IDLE      
*Jun 27 09:31:40.999: ISAKMP: set new node 1546295295 to QM_IDLE      
*Jun 27 09:31:40.999: ISAKMP:(0:1:SW:1): processing HASH payload. message 
                      ID = 1546295295
*Jun 27 09:31:40.999: ISAKMP:(0:1:SW:1): processing SA payload. 
                       message ID = 1546295295
*Jun 27 09:31:40.999: ISAKMP:(0:1:SW:1):Checking IPSec proposal 1
*Jun 27 09:31:40.999: ISAKMP: transform 1, ESP_DES
*Jun 27 09:31:40.999: ISAKMP:   attributes in transform:
*Jun 27 09:31:40.999: ISAKMP:      encaps is 61443 (Tunnel-UDP)
*Jun 27 09:31:40.999: ISAKMP:      SA life type in seconds
*Jun 27 09:31:40.999: ISAKMP:      SA life duration (basic) of 3600
*Jun 27 09:31:40.999: ISAKMP:      SA life type in kilobytes
*Jun 27 09:31:40.999: ISAKMP:      SA life duration (VPI) of  0x0 0x46 0x50 0x0 
*Jun 27 09:31:40.999: ISAKMP:      authenticator is HMAC-MD5
*Jun 27 09:31:40.999: ISAKMP:(0:1:SW:1):atts are acceptable.
*Jun 27 09:31:40.999: IPSEC(validate_proposal_request): proposal part #1,
  (key eng. msg.) INBOUND local= 209.165.200.2, remote= 209.165.201.2, 
    local_proxy= 192.168.1.0/255.255.255.0/0/0 (type=4), 
    remote_proxy= 172.16.2.0/255.255.255.0/0/0 (type=4),
    protocol= ESP, transform= esp-des esp-md5-hmac  (Tunnel-UDP), 
    lifedur= 0s and 0kb, 
    spi= 0x0(0), conn_id= 0, keysize= 0, flags= 0x400
*Jun 27 09:31:40.999: IPSEC(kei_proxy): head = mymap, map->ivrf = , kei->ivrf = 
*Jun 27 09:31:40.999: ISAKMP:(0:1:SW:1): processing NONCE payload. 
                      message ID = 1546295295
*Jun 27 09:31:40.999: ISAKMP:(0:1:SW:1): processing ID payload. 
                       message ID = 1546295295
*Jun 27 09:31:40.999: ISAKMP:(0:1:SW:1): processing ID payload. 
                      message ID = 1546295295
*Jun 27 09:31:40.999: ISAKMP:(0:1:SW:1): asking for 1 spis from ipsec
*Jun 27 09:31:40.999: ISAKMP:(0:1:SW:1):Node 1546295295, Input = 
                      IKE_MESG_FROM_PEER, IKE_QM_EXCH
*Jun 27 09:31:40.999: ISAKMP:(0:1:SW:1):Old State = IKE_QM_READY  
                       New State = IKE_QM_SPI_STARVE
*Jun 27 09:31:41.031: IPSEC(key_engine): got a queue event with 1 kei messages
*Jun 27 09:31:41.031: IPSEC(spi_response): getting spi 1315674383 for SA 
        from 209.165.200.2   to 209.165.201.2   for prot 3
*Jun 27 09:31:41.079: ISAKMP: received ike message (2/1)
*Jun 27 09:31:42.039: ISAKMP:(0:1:SW:1): sending packet to 209.165.201.2 
                       my_port 4500 peer_port 4500 (R) QM_IDLE      
*Jun 27 09:31:42.039: ISAKMP:(0:1:SW:1):Node 1546295295, 
                      Input = IKE_MESG_FROM_IPSEC, IKE_SPI_REPLY
*Jun 27 09:31:42.039: ISAKMP:(0:1:SW:1):Old State = IKE_QM_SPI_STARVE  
                       New State = IKE_QM_R_QM2
*Jun 27 09:31:42.311: ISAKMP (0:134217729): received packet from 209.165.201.2 
                       dport 4500 sport 4500 Global (R) QM_IDLE      
*Jun 27 09:31:42.311: IPSec: Flow_switching Allocated flow for flow_id 134217733 
*Jun 27 09:31:42.311: IPSec: Flow_switching Allocated flow for flow_id 134217734 
*Jun 27 09:31:43.339: %CRYPTO-5-SESSION_STATUS: Crypto tunnel is UP  .  
                      Peer 209.165.201.2:4500       Id: 172.16.1.2
*Jun 27 09:31:43.339: ISAKMP: Locking peer struct 0x2C50610, IPSEC refcount 1 
                      for for stuff_ke
*Jun 27 09:31:43.339: ISAKMP:(0:1:SW:1): Creating IPSec SAs
*Jun 27 09:31:43.339:         inbound SA from 209.165.201.2 to 209.165.200.2 
                              (f/i)  0/ 0
        (proxy 172.16.2.0 to 192.168.1.0)
*Jun 27 09:31:43.339:         has spi 0x4E6B990F and conn_id 2000 and flags 400
*Jun 27 09:31:43.339:         lifetime of 3600 seconds
*Jun 27 09:31:43.339:         lifetime of 4608000 kilobytes
*Jun 27 09:31:43.339:         has client flags 0x10
*Jun 27 09:31:43.339:         outbound SA from 209.165.200.2 to 209.165.201.2 
                              (f/i) 0/0
        (proxy 192.168.1.0 to 172.16.2.0)
*Jun 27 09:31:43.339:         has spi -1664481767 and conn_id 2001 and flags 408
*Jun 27 09:31:43.339:         lifetime of 3600 seconds
*Jun 27 09:31:43.339:         lifetime of 4608000 kilobytes
*Jun 27 09:31:43.339:         has client flags 0x10
*Jun 27 09:31:43.339: ISAKMP:(0:1:SW:1):deleting node 1546295295 error 
                      FALSE reason "quick mode done (await)"
*Jun 27 09:31:43.339: ISAKMP:(0:1:SW:1):Node 1546295295, Input = 
                      IKE_MESG_FROM_PEER, IKE_QM_EXCH
*Jun 27 09:31:43.339: ISAKMP:(0:1:SW:1):Old State = IKE_QM_R_QM2  
                       New State = IKE_QM_PHASE2_COMPLETE
*Jun 27 09:31:43.359: IPSEC(key_engine): got a queue event with 2 kei messages
*Jun 27 09:31:43.359: IPSEC(initialize_sas): ,
  (key eng. msg.) INBOUND local= 209.165.200.2, remote= 209.165.201.2, 
    local_proxy= 192.168.1.0/255.255.255.0/0/0 (type=4), 
    remote_proxy= 172.16.2.0/255.255.255.0/0/0 (type=4),
    protocol= ESP, transform= esp-des esp-md5-hmac  (Tunnel-UDP), 
    lifedur= 3600s and 4608000kb, 
    spi= 0x4E6B990F(1315674383), conn_id= 134219728, keysize= 0, flags= 0x400
*Jun 27 09:31:43.359: IPSEC(initialize_sas): ,
  (key eng. msg.) OUTBOUND local= 209.165.200.2, remote= 209.165.201.2, 
    local_proxy= 192.168.1.0/255.255.255.0/0/0 (type=4), 
    remote_proxy= 172.16.2.0/255.255.255.0/0/0 (type=4),
    protocol= ESP, transform= esp-des esp-md5-hmac  (Tunnel-UDP), 
    lifedur= 3600s and 4608000kb, 
    spi= 0x9CCA0619(2630485529), conn_id= 134219729, keysize= 0, flags= 0x408
*Jun 27 09:31:43.359: IPSEC(kei_proxy): head = mymap, map->ivrf = , kei->ivrf = 
*Jun 27 09:31:43.359: IPSEC(crypto_ipsec_sa_find_ident_head): 
                      reconnecting with the same proxies and 209.165.201.2
*Jun 27 09:31:43.359: IPSEC(mtree_add_ident): src 192.168.1.0, dest 172.16.2.0, 
                      dest_port 0

*Jun 27 09:31:43.359: IPSEC(create_sa): sa created,
  (sa) sa_dest= 209.165.200.2, sa_prot= 50, 
    sa_spi= 0x4E6B990F(1315674383), 
    sa_trans= esp-des esp-md5-hmac , sa_conn_id= 134219728
*Jun 27 09:31:43.359: IPSEC(create_sa): sa created,
  (sa) sa_dest= 209.165.201.2, sa_prot= 50, 
    sa_spi= 0x9CCA0619(2630485529), 
    sa_trans= esp-des esp-md5-hmac , sa_conn_id= 134219729
*Jun 27 09:32:33.359: ISAKMP:(0:1:SW:1):purging node 1546295295 

VPN-Gateway2#debug crypto ipsec
Crypto IPSEC debugging is on
VPN-Gateway2#debug crypto isakmp
Crypto ISAKMP debugging is on
VPN-Gateway2#show debug
Cryptographic Subsystem:
  Crypto ISAKMP debugging is on
  Crypto IPSEC debugging is on
VPN-Gateway2#


 !--- These debugs appeared after a ping !--- was attempted from PC2 to PC1.


*Jun 27 09:31:35.447: IPSEC(sa_request): ,
  (key eng. msg.) OUTBOUND local= 172.16.1.2, remote= 209.165.200.2, 
    local_proxy= 172.16.2.0/255.255.255.0/0/0 (type=4), 
    remote_proxy= 192.168.1.0/255.255.255.0/0/0 (type=4),
    protocol= ESP, transform= esp-des esp-md5-hmac  (Tunnel), 
    lifedur= 3600s and 4608000kb, 
    spi= 0x9CCA0619(2630485529), conn_id= 0, keysize= 0, flags= 0x400A
*Jun 27 09:31:35.455: ISAKMP: received ke message (1/1)
*Jun 27 09:31:35.455: ISAKMP:(0:0:N/A:0): SA request profile is (NULL)
*Jun 27 09:31:35.455: ISAKMP: Created a peer struct for 209.165.200.2, 
                      peer port 500
*Jun 27 09:31:35.455: ISAKMP: Locking peer struct 0x2C42438, IKE refcount 
                       1 for isakmp_initiator
*Jun 27 09:31:35.455: ISAKMP: local port 500, remote port 500
*Jun 27 09:31:35.487: ISAKMP: set new node 0 to QM_IDLE      
*Jun 27 09:31:35.487: insert sa successfully sa = 2CB1E80
*Jun 27 09:31:35.487: ISAKMP:(0:1:SW:1):Can not start Aggressive mode, 
                      trying Main mode.
*Jun 27 09:31:35.487: ISAKMP: Looking for a matching key for 209.165.200.2 
                      in default : success
*Jun 27 09:31:35.487: ISAKMP:(0:1:SW:1):found peer pre-shared key matching 
                      209.165.200.2
*Jun 27 09:31:35.487: ISAKMP:(0:1:SW:1): constructed NAT-T vendor-03 ID
*Jun 27 09:31:35.487: ISAKMP:(0:1:SW:1): constructed NAT-T vendor-02 ID
*Jun 27 09:31:35.487: ISAKMP:(0:1:SW:1):Input = IKE_MESG_FROM_IPSEC, 
                      IKE_SA_REQ_MM
*Jun 27 09:31:35.487: ISAKMP:(0:1:SW:1):Old State = IKE_READY  
                       New State = IKE_I_MM1 

*Jun 27 09:31:35.487: ISAKMP:(0:1:SW:1): beginning Main Mode exchange
*Jun 27 09:31:35.487: ISAKMP:(0:1:SW:1): sending packet to 209.165.200.2 
                      my_port 500 peer_port 500 (I) MM_NO_STATE
*Jun 27 09:31:36.607: ISAKMP (0:134217729): received packet from 209.165.200.2 
                      dport 500 sport 500 Global (I) MM_NO_STATE
*Jun 27 09:31:36.607: ISAKMP:(0:1:SW:1):Input = IKE_MESG_FROM_PEER, 
                      IKE_MM_EXCH
*Jun 27 09:31:36.607: ISAKMP:(0:1:SW:1):Old State = IKE_I_MM1  
                      New State = IKE_I_MM2 

*Jun 27 09:31:36.687: ISAKMP:(0:1:SW:1): processing SA payload. message ID = 0
*Jun 27 09:31:36.687: ISAKMP:(0:1:SW:1): processing vendor id payload
*Jun 27 09:31:36.687: ISAKMP:(0:1:SW:1): vendor ID seems Unity/DPD but 
                      major 157 mismatch
*Jun 27 09:31:36.687: ISAKMP:(0:1:SW:1): vendor ID is NAT-T v3
*Jun 27 09:31:36.687: ISAKMP: Looking for a matching key for 209.165.200.2 
                      in default : success
*Jun 27 09:31:36.687: ISAKMP:(0:1:SW:1):found peer pre-shared key 
                      matching 209.165.200.2
*Jun 27 09:31:36.687: ISAKMP:(0:1:SW:1): local preshared key found
*Jun 27 09:31:36.687: ISAKMP : Scanning profiles for xauth ...
*Jun 27 09:31:36.687: ISAKMP:(0:1:SW:1):Checking ISAKMP transform 1 
                      against priority 10 policy
*Jun 27 09:31:36.687: ISAKMP:      encryption DES-CBC
*Jun 27 09:31:36.687: ISAKMP:      hash SHA
*Jun 27 09:31:36.687: ISAKMP:      default group 1
*Jun 27 09:31:36.687: ISAKMP:      auth pre-share
*Jun 27 09:31:36.687: ISAKMP:      life type in seconds
*Jun 27 09:31:36.687: ISAKMP:      life duration (VPI) of  0x0 0x1 0x51 0x80 
*Jun 27 09:31:36.687: ISAKMP:(0:1:SW:1):atts are acceptable. Next payload is 0
*Jun 27 09:31:36.687: ISAKMP:(0:1:SW:1): processing vendor id payload
*Jun 27 09:31:36.687: ISAKMP:(0:1:SW:1): vendor ID seems Unity/DPD but 
                      major 157 mismatch
*Jun 27 09:31:36.687: ISAKMP:(0:1:SW:1): vendor ID is NAT-T v3
*Jun 27 09:31:36.687: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                      IKE_PROCESS_MAIN_MODE
*Jun 27 09:31:36.687: ISAKMP:(0:1:SW:1):Old State = IKE_I_MM2  
                      New State = IKE_I_MM2 

*Jun 27 09:31:36.795: ISAKMP:(0:1:SW:1): sending packet to 209.165.200.2 
                      my_port 500 peer_port 500 (I) MM_SA_SETUP
*Jun 27 09:31:36.795: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                      IKE_PROCESS_COMPLETE
*Jun 27 09:31:36.795: ISAKMP:(0:1:SW:1):Old State = IKE_I_MM2  
                       New State = IKE_I_MM3 

*Jun 27 09:31:38.727: ISAKMP (0:134217729): received packet from 209.165.200.2 
                      dport 500 sport 500 Global (I) MM_SA_SETUP
*Jun 27 09:31:38.727: ISAKMP:(0:1:SW:1):Input = IKE_MESG_FROM_PEER, 
                      IKE_MM_EXCH
*Jun 27 09:31:38.727: ISAKMP:(0:1:SW:1):Old State = IKE_I_MM3  
                       New State = IKE_I_MM4 

*Jun 27 09:31:38.807: ISAKMP:(0:1:SW:1): processing KE payload. 
                       message ID = 0
*Jun 27 09:31:38.807: ISAKMP:(0:1:SW:1): processing NONCE payload. message ID = 0
*Jun 27 09:31:38.807: ISAKMP: Looking for a matching key for 209.165.200.2 
                      in default : success
*Jun 27 09:31:38.807: ISAKMP:(0:1:SW:1):found peer pre-shared key matching 
                      209.165.200.2
*Jun 27 09:31:38.807: ISAKMP:(0:1:SW:1):SKEYID state generated
*Jun 27 09:31:38.807: ISAKMP:(0:1:SW:1): processing vendor id payload
*Jun 27 09:31:38.807: ISAKMP:(0:1:SW:1): vendor ID is Unity
*Jun 27 09:31:38.807: ISAKMP:(0:1:SW:1): processing vendor id payload
*Jun 27 09:31:38.807: ISAKMP:(0:1:SW:1): vendor ID is DPD
*Jun 27 09:31:38.807: ISAKMP:(0:1:SW:1): processing vendor id payload
*Jun 27 09:31:38.807: ISAKMP:(0:1:SW:1): speaking to another IOS box!
*Jun 27 09:31:38.807: ISAKMP:received payload type 17
*Jun 27 09:31:38.807: ISAKMP (0:134217729): NAT found, the node inside NAT
*Jun 27 09:31:38.807: ISAKMP:received payload type 17
*Jun 27 09:31:38.807: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                      IKE_PROCESS_MAIN_MODE
*Jun 27 09:31:38.807: ISAKMP:(0:1:SW:1):Old State = IKE_I_MM4  
                      New State = IKE_I_MM4 

*Jun 27 09:31:38.935: ISAKMP:(0:1:SW:1):Send initial contact
*Jun 27 09:31:38.935: ISAKMP:(0:1:SW:1):SA is doing pre-shared key 
                      authentication using id type ID_IPV4_ADDR
*Jun 27 09:31:38.935: ISAKMP (0:134217729): ID payload 
        next-payload : 8
        type         : 1 
        address      : 172.16.1.2 
        protocol     : 17 
        port         : 0 
        length       : 12
*Jun 27 09:31:38.935: ISAKMP:(0:1:SW:1):Total payload length: 12
*Jun 27 09:31:38.935: ISAKMP:(0:1:SW:1): sending packet to 209.165.200.2 
                      my_port 4500 peer_port 4500 (I) MM_KEY_EXCH
*Jun 27 09:31:38.935: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                      IKE_PROCESS_COMPLETE
*Jun 27 09:31:38.935: ISAKMP:(0:1:SW:1):Old State = IKE_I_MM4  
                       New State = IKE_I_MM5 

*Jun 27 09:31:40.307: ISAKMP (0:134217729): received packet from 
                      209.165.200.2 dport 4500 sport 4500 Global (I) MM_KEY_EXCH
*Jun 27 09:31:40.307: ISAKMP:(0:1:SW:1):Input = IKE_MESG_FROM_PEER, 
                       IKE_MM_EXCH
*Jun 27 09:31:40.307: ISAKMP:(0:1:SW:1):Old State = IKE_I_MM5  
                      New State = IKE_I_MM6 

*Jun 27 09:31:40.367: ISAKMP:(0:1:SW:1): processing ID payload. message ID = 0
*Jun 27 09:31:40.367: ISAKMP (0:134217729): ID payload 
        next-payload : 8
        type         : 1 
        address      : 209.165.200.2 
        protocol     : 17 
        port         : 0 
        length       : 12
*Jun 27 09:31:40.367: ISAKMP:(0:1:SW:1): processing HASH payload. message ID = 0
*Jun 27 09:31:40.367: ISAKMP:(0:1:SW:1):SA authentication status:
        authenticated
*Jun 27 09:31:40.367: ISAKMP:(0:1:SW:1):SA has been authenticated with 
                      209.165.200.2
*Jun 27 09:31:40.367: ISAKMP:(0:1:SW:1):: peer matches *none* of the 
                       profiles
*Jun 27 09:31:40.367: ISAKMP:(0:1:SW:1):Setting UDP ENC peer struct 
                      0x2940710 sa= 0x2CB1E80
*Jun 27 09:31:40.367: ISAKMP: Trying to insert a peer 
                      172.16.1.2/209.165.200.2/4500/,  and inserted successfully.
*Jun 27 09:31:40.367: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                      IKE_PROCESS_MAIN_MODE
*Jun 27 09:31:40.367: ISAKMP:(0:1:SW:1):Old State = IKE_I_MM6  
                       New State = IKE_I_MM6 

*Jun 27 09:31:40.367: ISAKMP: sending nat keepalive packet to 209.165.200.2(4500)
*Jun 27 09:31:40.395: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                       IKE_PROCESS_COMPLETE
*Jun 27 09:31:40.395: ISAKMP:(0:1:SW:1):Old State = IKE_I_MM6  
                      New State = IKE_P1_COMPLETE 

*Jun 27 09:31:40.475: ISAKMP:(0:1:SW:1):beginning Quick Mode exchange, 
                      M-ID of 1546295295
*Jun 27 09:31:40.507: ISAKMP:(0:1:SW:1): sending packet to 209.165.200.2 
                       my_port 4500 peer_port 4500 (I) QM_IDLE      
*Jun 27 09:31:40.507: ISAKMP:(0:1:SW:1):Node 1546295295, Input = IKE_MESG_INTERNAL, 
                      IKE_INIT_QM
*Jun 27 09:31:40.507: ISAKMP:(0:1:SW:1):Old State = IKE_QM_READY  
                      New State = IKE_QM_I_QM1
*Jun 27 09:31:40.507: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                      IKE_PHASE1_COMPLETE
*Jun 27 09:31:40.507: ISAKMP:(0:1:SW:1):Old State = IKE_P1_COMPLETE  
                      New State = IKE_P1_COMPLETE 

*Jun 27 09:31:41.887: ISAKMP (0:134217729): received packet from 
                       209.165.200.2 dport 4500 sport 4500 Global (I) QM_IDLE      
*Jun 27 09:31:41.887: ISAKMP:(0:1:SW:1): processing HASH payload. 
                       message ID = 1546295295
*Jun 27 09:31:41.887: ISAKMP:(0:1:SW:1): processing SA payload. 
                       message ID = 1546295295
*Jun 27 09:31:41.887: ISAKMP:(0:1:SW:1):Checking IPSec proposal 1
*Jun 27 09:31:41.887: ISAKMP: transform 1, ESP_DES
*Jun 27 09:31:41.887: ISAKMP:   attributes in transform:
*Jun 27 09:31:41.887: ISAKMP:      encaps is 61443 (Tunnel-UDP)
*Jun 27 09:31:41.887: ISAKMP:      SA life type in seconds
*Jun 27 09:31:41.887: ISAKMP:      SA life duration (basic) of 3600
*Jun 27 09:31:41.887: ISAKMP:      SA life type in kilobytes
*Jun 27 09:31:41.887: ISAKMP:      SA life duration (VPI) of  0x0 0x46 0x50 0x0 
*Jun 27 09:31:41.887: ISAKMP:      authenticator is HMAC-MD5
*Jun 27 09:31:41.887: ISAKMP:(0:1:SW:1):atts are acceptable.
*Jun 27 09:31:41.887: IPSEC(validate_proposal_request): proposal part #1,
  (key eng. msg.) INBOUND local= 172.16.1.2, remote= 209.165.200.2, 
    local_proxy= 172.16.2.0/255.255.255.0/0/0 (type=4), 
    remote_proxy= 192.168.1.0/255.255.255.0/0/0 (type=4),
    protocol= ESP, transform= esp-des esp-md5-hmac  (Tunnel-UDP), 
    lifedur= 0s and 0kb, 
    spi= 0x0(0), conn_id= 0, keysize= 0, flags= 0x400
*Jun 27 09:31:41.887: IPSEC(kei_proxy): head = mymap, map->ivrf = , kei->ivrf = 
*Jun 27 09:31:41.887: ISAKMP:(0:1:SW:1): processing NONCE payload. 
                       message ID = 1546295295
*Jun 27 09:31:41.887: ISAKMP:(0:1:SW:1): processing ID payload. 
                       message ID = 1546295295
*Jun 27 09:31:41.887: ISAKMP:(0:1:SW:1): processing ID payload. 
                       message ID = 1546295295
*Jun 27 09:31:41.887: IPSec: Flow_switching Allocated flow for flow_id 134217729 
*Jun 27 09:31:41.887: IPSec: Flow_switching Allocated flow for flow_id 134217730 
*Jun 27 09:31:41.947: %CRYPTO-5-SESSION_STATUS: Crypto tunnel is UP  .  
                      Peer 209.165.200.2:4500       Id: 209.165.200.2
*Jun 27 09:31:41.947: ISAKMP: Locking peer struct 0x2C42438, IPSEC refcount 
                      1 for for stuff_ke
*Jun 27 09:31:41.947: ISAKMP:(0:1:SW:1): Creating IPSec SAs
*Jun 27 09:31:41.947:         inbound SA from 209.165.200.2 to 172.16.1.2 
                               (f/i)  0/ 0
        (proxy 192.168.1.0 to 172.16.2.0)
*Jun 27 09:31:41.947:         has spi 0x9CCA0619 and conn_id 2000 and flags 400
*Jun 27 09:31:41.947:         lifetime of 3600 seconds
*Jun 27 09:31:41.947:         lifetime of 4608000 kilobytes
*Jun 27 09:31:41.947:         has client flags 0x10
*Jun 27 09:31:41.947:         outbound SA from 172.16.1.2 to 209.165.200.2 
                              (f/i) 0/0
        (proxy 172.16.2.0 to 192.168.1.0)
*Jun 27 09:31:41.947:         has spi 1315674383 and conn_id 2001 and flags 408
*Jun 27 09:31:41.947:         lifetime of 3600 seconds
*Jun 27 09:31:41.947:         lifetime of 4608000 kilobytes
*Jun 27 09:31:41.947:         has client flags 0x10
*Jun 27 09:31:41.947: ISAKMP:(0:1:SW:1): sending packet to 209.165.200.2 
                         my_port 4500 peer_port 4500 (I) QM_IDLE      
*Jun 27 09:31:41.947: ISAKMP:(0:1:SW:1):deleting node 1546295295 error 
                      FALSE reason ""
*Jun 27 09:31:41.947: ISAKMP:(0:1:SW:1):Node 1546295295, Input = 
                      IKE_MESG_FROM_PEER, IKE_QM_EXCH
*Jun 27 09:31:41.947: ISAKMP:(0:1:SW:1):Old State = IKE_QM_I_QM1  
                       New State = IKE_QM_PHASE2_COMPLETE
*Jun 27 09:31:41.955: IPSEC(key_engine): got a queue event with 2 kei messages
*Jun 27 09:31:41.955: IPSEC(initialize_sas): ,
  (key eng. msg.) INBOUND local= 172.16.1.2, remote= 209.165.200.2, 
    local_proxy= 172.16.2.0/255.255.255.0/0/0 (type=4), 
    remote_proxy= 192.168.1.0/255.255.255.0/0/0 (type=4),
    protocol= ESP, transform= esp-des esp-md5-hmac  (Tunnel-UDP), 
    lifedur= 3600s and 4608000kb, 
    spi= 0x9CCA0619(2630485529), conn_id= 134219728, keysize= 0, flags= 0x400
*Jun 27 09:31:41.955: IPSEC(initialize_sas): ,
  (key eng. msg.) OUTBOUND local= 172.16.1.2, remote= 209.165.200.2, 
    local_proxy= 172.16.2.0/255.255.255.0/0/0 (type=4), 
    remote_proxy= 192.168.1.0/255.255.255.0/0/0 (type=4),
    protocol= ESP, transform= esp-des esp-md5-hmac  (Tunnel-UDP), 
    lifedur= 3600s and 4608000kb, 
    spi= 0x4E6B990F(1315674383), conn_id= 134219729, keysize= 0, flags= 0x408
*Jun 27 09:31:41.955: IPSEC(kei_proxy): head = mymap, map->ivrf = , kei->ivrf = 
*Jun 27 09:31:41.955: IPSEC(crypto_ipsec_sa_find_ident_head): reconnecting 
                     with the same proxies and 209.165.200.2
*Jun 27 09:31:41.955: IPSEC(mtree_add_ident): src 172.16.2.0, dest 192.168.1.0, 
                       dest_port 0

*Jun 27 09:31:41.955: IPSEC(create_sa): sa created,
  (sa) sa_dest= 172.16.1.2, sa_prot= 50, 
    sa_spi= 0x9CCA0619(2630485529), 
    sa_trans= esp-des esp-md5-hmac , sa_conn_id= 134219728
*Jun 27 09:31:41.955: IPSEC(create_sa): sa created,
  (sa) sa_dest= 209.165.200.2, sa_prot= 50, 
    sa_spi= 0x4E6B990F(1315674383), 
    sa_trans= esp-des esp-md5-hmac , sa_conn_id= 134219729
VPN-Gateway2#
*Jun 27 09:32:31.979: ISAKMP:(0:1:SW:1):purging node 1546295295


PAT-Router#debug ip nat detail
IP NAT detailed debugging is on
PAT-Router#show debug
Generic IP:
  IP NAT detailed debugging is on
PAT-Router#

!--- The "i" in this line indicates the packet is traveling from the !--- inside to the outside (from a NAT perspective) interface. The number in !--- the brackets is the identification number in the IP packet. This is !--- useful when correlating information with sniffer traces taken with a !--- network analyzer while troubleshooting problems.

*Jun 27 09:31:35.375: NAT*: i: udp (172.16.1.2, 500) -> (209.165.200.2, 500) [66]

!--- The "s" in this next line shows the source address of the packet and how it is !--- being translated. 

*Jun 27 09:31:35.375: NAT*: s=172.16.1.2->209.165.201.2, d=209.165.200.2 [66]
*Jun 27 09:31:36.475: NAT*: o: udp (209.165.200.2, 500) -> (209.165.201.2, 500) [66]     
*Jun 27 09:31:36.475: NAT*: s=209.165.200.2, d=209.165.201.2->172.16.1.2 [66]
*Jun 27 09:31:36.683: NAT*: i: udp (172.16.1.2, 500) -> (209.165.200.2, 500) [67]
*Jun 27 09:31:36.683: NAT*: s=172.16.1.2->209.165.201.2, d=209.165.200.2 [67]
*Jun 27 09:31:38.595: NAT*: o: udp (209.165.200.2, 500) -> (209.165.201.2, 500) [67]
*Jun 27 09:31:38.595: NAT*: s=209.165.200.2, d=209.165.201.2->172.16.1.2 [67]
*Jun 27 09:31:38.823: NAT*: i: udp (172.16.1.2, 4500) -> (209.165.200.2, 4500) [68]
*Jun 27 09:31:38.823: NAT*: s=172.16.1.2->209.165.201.2, d=209.165.200.2 [68]
*Jun 27 09:31:40.163: NAT*: o: udp (209.165.200.2, 4500) -> (209.165.201.2, 4500) [68]     
*Jun 27 09:31:40.163: NAT*: s=209.165.200.2, d=209.165.201.2->172.16.1.2 [68]
*Jun 27 09:31:40.255: NAT*: i: udp (172.16.1.2, 4500) -> (209.165.200.2, 4500) [69]
*Jun 27 09:31:40.255: NAT*: s=172.16.1.2->209.165.201.2, d=209.165.200.2 [69]
*Jun 27 09:31:40.395: NAT*: i: udp (172.16.1.2, 4500) -> (209.165.200.2, 4500) [70]
*Jun 27 09:31:40.395: NAT*: s=172.16.1.2->209.165.201.2, d=209.165.200.2 [70]
*Jun 27 09:31:41.747: NAT*: o: udp (209.165.200.2, 4500) -> (209.165.201.2, 4500) [69]
*Jun 27 09:31:41.747: NAT*: s=209.165.200.2, d=209.165.201.2->172.16.1.2 [69]
*Jun 27 09:31:41.839: NAT*: i: udp (172.16.1.2, 4500) -> (209.165.200.2, 4500) [71]
*Jun 27 09:31:41.839: NAT*: s=172.16.1.2->209.165.201.2, d=209.165.200.2 [71]
*Jun 27 09:31:43.463: NAT*: i: udp (172.16.1.2, 4500) -> (209.165.200.2, 4500) [72]
*Jun 27 09:31:43.463: NAT*: s=172.16.1.2->209.165.201.2, d=209.165.200.2 [72]
*Jun 27 09:31:43.523: NAT*: o: udp (209.165.200.2, 4500) -> (209.165.201.2, 4500) [70]
*Jun 27 09:31:43.523: NAT*: s=209.165.200.2, d=209.165.201.2->172.16.1.2 [70]
*Jun 27 09:33:27.975: NAT*: i: udp (172.16.1.2, 4500) -> (209.165.200.2, 4500) [73]
*Jun 27 09:33:27.975: NAT*: s=172.16.1.2->209.165.201.2, d=209.165.200.2 [73]
*Jun 27 09:33:28.067: NAT*: o: udp (209.165.200.2, 4500) -> (209.165.201.2, 4500) [71]
*Jun 27 09:33:28.067: NAT*: s=209.165.200.2, d=209.165.201.2->172.16.1.2 [71]
*Jun 27 09:33:28.115: NAT*: i: udp (172.16.1.2, 4500) -> (209.165.200.2, 4500) [74]
*Jun 27 09:33:28.115: NAT*: s=172.16.1.2->209.165.201.2, d=209.165.200.2 [74]
*Jun 27 09:33:28.167: NAT*: o: udp (209.165.200.2, 4500) -> (209.165.201.2, 4500) [72]
*Jun 27 09:33:28.167: NAT*: s=209.165.200.2, d=209.165.201.2->172.16.1.2 [72]
*Jun 27 09:33:28.227: NAT*: i: udp (172.16.1.2, 4500) -> (209.165.200.2, 4500) [75]
*Jun 27 09:33:28.227: NAT*: s=172.16.1.2->209.165.201.2, d=209.165.200.2 [75]
*Jun 27 09:33:28.283: NAT*: o: udp (209.165.200.2, 4500) -> (209.165.201.2, 4500) [73]
*Jun 27 09:33:28.283: NAT*: s=209.165.200.2, d=209.165.201.2->172.16.1.2 [73]
*Jun 27 09:33:28.355: NAT*: i: udp (172.16.1.2, 4500) -> (209.165.200.2, 4500) [76]
*Jun 27 09:33:28.355: NAT*: s=172.16.1.2->209.165.201.2, d=209.165.200.2 [76]
*Jun 27 09:33:28.407: NAT*: o: udp (209.165.200.2, 4500) -> (209.165.201.2, 4500) [74]
*Jun 27 09:33:28.407: NAT*: s=209.165.200.2, d=209.165.201.2->172.16.1.2 [74]
*Jun 27 09:33:28.455: NAT*: i: udp (172.16.1.2, 4500) -> (209.165.200.2, 4500) [77]
*Jun 27 09:33:28.455: NAT*: s=172.16.1.2->209.165.201.2, d=209.165.200.2 [77]
*Jun 27 09:33:28.487: NAT*: o: udp (209.165.200.2, 4500) -> (209.165.201.2, 4500) [75]
*Jun 27 09:33:28.487: NAT*: s=209.165.200.2, d=209.165.201.2->172.16.1.2 [75]

IPSec NAT 透過を伴わない場合のトラブルシューティング

debug crypto ipsec：フェーズ 2 の IPsec ネゴシエーションを表示します。
debug crypto isakmp：フェーズ 1 の ISAKMP ネゴシエーションを表示します。
debug ip nat detail：ルータで実行中の NAT を検証します。

次に、サンプルのコマンド出力を示します。

VPN-Gateway1#debug crypto ipsec
Crypto IPSEC debugging is on
VPN-Gateway1#debug crypto isakmp
Crypto ISAKMP debugging is on
VPN-Gateway1#show debug
Cryptographic Subsystem:
  Crypto ISAKMP debugging is on
  Crypto IPSEC debugging is on

 
!--- These debugs appeared after a ping !--- was attempted from PC2 to PC1.


*Jun 27 09:49:58.351: ISAKMP (0:0): received packet from 209.165.201.2 
                      dport 500 sport 500 Global (N) NEW SA
*Jun 27 09:49:58.351: ISAKMP: Created a peer struct for 209.165.201.2, 
                      peer port 500
*Jun 27 09:49:58.351: ISAKMP: Locking peer struct 0x2C50328, IKE refcount 1 
                      for crypto_isakmp_process_block
*Jun 27 09:49:58.351: ISAKMP: local port 500, remote port 500
*Jun 27 09:49:58.991: insert sa successfully sa = 29D2E80
*Jun 27 09:49:58.991: ISAKMP:(0:1:SW:1):Input = IKE_MESG_FROM_PEER, IKE_MM_EXCH
*Jun 27 09:49:58.991: ISAKMP:(0:1:SW:1):Old State = IKE_READY  New State = 
                      IKE_R_MM1 

*Jun 27 09:49:59.151: ISAKMP:(0:1:SW:1): processing SA payload. message ID = 0
*Jun 27 09:49:59.151: ISAKMP: Looking for a matching key for 209.165.201.2 
                      in default : success
*Jun 27 09:49:59.151: ISAKMP:(0:1:SW:1):found peer pre-shared key matching 
                      209.165.201.2
*Jun 27 09:49:59.151: ISAKMP:(0:1:SW:1): local preshared key found
*Jun 27 09:49:59.151: ISAKMP : Scanning profiles for xauth ...
*Jun 27 09:49:59.151: ISAKMP:(0:1:SW:1):Checking ISAKMP transform 1 against 
                      priority 10 policy
*Jun 27 09:49:59.151: ISAKMP:      encryption DES-CBC
*Jun 27 09:49:59.151: ISAKMP:      hash SHA
*Jun 27 09:49:59.151: ISAKMP:      default group 1
*Jun 27 09:49:59.151: ISAKMP:      auth pre-share
*Jun 27 09:49:59.151: ISAKMP:      life type in seconds
*Jun 27 09:49:59.151: ISAKMP:      life duration (VPI) of  0x0 0x1 0x51 0x80 
*Jun 27 09:49:59.151: ISAKMP:(0:1:SW:1):atts are acceptable. Next payload is 0
*Jun 27 09:49:59.151: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                      IKE_PROCESS_MAIN_MODE
*Jun 27 09:49:59.151: ISAKMP:(0:1:SW:1):Old State = IKE_R_MM1  
                      New State = IKE_R_MM1 

*Jun 27 09:49:59.223: ISAKMP:(0:1:SW:1): sending packet to 209.165.201.2 
                       my_port 500 peer_port 500 (R) MM_SA_SETUP
*Jun 27 09:49:59.223: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                       IKE_PROCESS_COMPLETE
*Jun 27 09:49:59.223: ISAKMP:(0:1:SW:1):Old State = IKE_R_MM1  New State = 
                      IKE_R_MM2 

*Jun 27 09:49:59.711: ISAKMP (0:134217729): received packet from 209.165.201.2 
                      dport 500 sport 500 Global (R) MM_SA_SETUP
*Jun 27 09:49:59.711: ISAKMP:(0:1:SW:1):Input = IKE_MESG_FROM_PEER, 
                      IKE_MM_EXCH
*Jun 27 09:49:59.711: ISAKMP:(0:1:SW:1):Old State = IKE_R_MM2  
                      New State = IKE_R_MM3 

*Jun 27 09:49:59.763: ISAKMP:(0:1:SW:1): processing KE payload. message ID = 0
*Jun 27 09:49:59.763: ISAKMP:(0:1:SW:1): processing NONCE payload. 
                      message ID = 0
*Jun 27 09:49:59.911: ISAKMP: Looking for a matching key for 209.165.201.2 
                      in default : success
*Jun 27 09:49:59.911: ISAKMP:(0:1:SW:1):found peer pre-shared key matching 
                      209.165.201.2
*Jun 27 09:49:59.911: ISAKMP:(0:1:SW:1):SKEYID state generated
*Jun 27 09:49:59.911: ISAKMP:(0:1:SW:1): processing vendor id payload
*Jun 27 09:49:59.911: ISAKMP:(0:1:SW:1): vendor ID is Unity
*Jun 27 09:49:59.911: ISAKMP:(0:1:SW:1): processing vendor id payload
*Jun 27 09:49:59.911: ISAKMP:(0:1:SW:1): vendor ID is DPD
*Jun 27 09:49:59.911: ISAKMP:(0:1:SW:1): processing vendor id payload
*Jun 27 09:49:59.911: ISAKMP:(0:1:SW:1): speaking to another IOS box!
*Jun 27 09:49:59.911: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                      IKE_PROCESS_MAIN_MODE
*Jun 27 09:49:59.911: ISAKMP:(0:1:SW:1):Old State = IKE_R_MM3  
                      New State = IKE_R_MM3 

*Jun 27 09:50:00.051: ISAKMP:(0:1:SW:1): sending packet to 209.165.201.2 
                      my_port 500 peer_port 500 (R) MM_KEY_EXCH
*Jun 27 09:50:00.051: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                      IKE_PROCESS_COMPLETE
*Jun 27 09:50:00.051: ISAKMP:(0:1:SW:1):Old State = IKE_R_MM3  New State = 
                       IKE_R_MM4 

*Jun 27 09:50:00.743: ISAKMP (0:134217729): received packet from 209.165.201.2 
                       dport 500 sport 500 Global (R) MM_KEY_EXCH
*Jun 27 09:50:00.743: ISAKMP:(0:1:SW:1):Input = IKE_MESG_FROM_PEER, 
                      IKE_MM_EXCH
*Jun 27 09:50:00.743: ISAKMP:(0:1:SW:1):Old State = IKE_R_MM4  
                      New State = IKE_R_MM5 

*Jun 27 09:50:00.811: ISAKMP:(0:1:SW:1): processing ID payload. message ID = 0
*Jun 27 09:50:00.811: ISAKMP (0:134217729): ID payload 
        next-payload : 8
        type         : 1 
        address      : 172.16.1.2 
        protocol     : 17 
        port         : 500 
        length       : 12
*Jun 27 09:50:00.811: ISAKMP:(0:1:SW:1):: peer matches *none* of the profiles
*Jun 27 09:50:00.811: ISAKMP:(0:1:SW:1): processing HASH payload. message ID = 0
*Jun 27 09:50:00.811: ISAKMP:(0:1:SW:1): processing NOTIFY INITIAL_CONTACT 
                       protocol 1
        spi 0, message ID = 0, sa = 29D2E80
*Jun 27 09:50:00.811: ISAKMP:(0:1:SW:1):SA authentication status:
        authenticated
*Jun 27 09:50:00.811: ISAKMP:(0:1:SW:1): Process initial contact,
                    bring down existing phase 1 and 2 SA's with local 
                     209.165.200.2 remote 
                     209.165.201.2 remote port 500
*Jun 27 09:50:00.811: ISAKMP:(0:1:SW:1):SA authentication status:
        authenticated
*Jun 27 09:50:00.811: ISAKMP:(0:1:SW:1):SA has been authenticated with 
                      209.165.201.2
*Jun 27 09:50:00.811: ISAKMP: Trying to insert a peer 
                      209.165.200.2/209.165.201.2/500/,  and inserted successfully.
*Jun 27 09:50:00.811: ISAKMP:(0:1:SW:1):: peer matches *none* of the profiles
*Jun 27 09:50:00.811: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                      IKE_PROCESS_MAIN_MODE
*Jun 27 09:50:00.811: ISAKMP:(0:1:SW:1):Old State = IKE_R_MM5  
                      New State = IKE_R_MM5 

*Jun 27 09:50:00.851: IPSEC(key_engine): got a queue event with 1 kei messages
*Jun 27 09:50:00.963: ISAKMP:(0:1:SW:1):SA is doing pre-shared key 
                        authentication using id type ID_IPV4_ADDR
*Jun 27 09:50:00.963: ISAKMP (0:134217729): ID payload 
        next-payload : 8
        type         : 1 
        address      : 209.165.200.2 
        protocol     : 17 
        port         : 500 
        length       : 12
*Jun 27 09:50:00.963: ISAKMP:(0:1:SW:1):Total payload length: 12
*Jun 27 09:50:00.963: ISAKMP:(0:1:SW:1): sending packet to 209.165.201.2 
                      my_port 500 peer_port 500 (R) MM_KEY_EXCH
*Jun 27 09:50:00.963: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                      IKE_PROCESS_COMPLETE
*Jun 27 09:50:00.963: ISAKMP:(0:1:SW:1):Old State = IKE_R_MM5  New State = 
                      IKE_P1_COMPLETE 

*Jun 27 09:50:01.043: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                       IKE_PHASE1_COMPLETE
*Jun 27 09:50:01.043: ISAKMP:(0:1:SW:1):Old State = IKE_P1_COMPLETE  
                       New State = IKE_P1_COMPLETE 

*Jun 27 09:50:01.403: ISAKMP (0:134217729): received packet from 209.165.201.2 
                      dport 500 sport 500 Global (R) QM_IDLE      
*Jun 27 09:50:01.403: ISAKMP: set new node 1689610294 to QM_IDLE      
*Jun 27 09:50:01.403: ISAKMP:(0:1:SW:1): processing HASH payload. message 
                       ID = 1689610294
*Jun 27 09:50:01.403: ISAKMP:(0:1:SW:1): processing SA payload. message 
                      ID = 1689610294
*Jun 27 09:50:01.403: ISAKMP:(0:1:SW:1):Checking IPSec proposal 1
*Jun 27 09:50:01.403: ISAKMP: transform 1, ESP_DES
*Jun 27 09:50:01.403: ISAKMP:   attributes in transform:
*Jun 27 09:50:01.403: ISAKMP:      encaps is 1 (Tunnel)
*Jun 27 09:50:01.403: ISAKMP:      SA life type in seconds
*Jun 27 09:50:01.403: ISAKMP:      SA life duration (basic) of 3600
*Jun 27 09:50:01.403: ISAKMP:      SA life type in kilobytes
*Jun 27 09:50:01.403: ISAKMP:      SA life duration (VPI) of  0x0 0x46 0x50 0x0 
*Jun 27 09:50:01.403: ISAKMP:      authenticator is HMAC-MD5
*Jun 27 09:50:01.403: ISAKMP:(0:1:SW:1):atts are acceptable.
*Jun 27 09:50:01.403: IPSEC(validate_proposal_request): proposal part #1,
  (key eng. msg.) INBOUND local= 209.165.200.2, remote= 209.165.201.2, 
    local_proxy= 192.168.1.0/255.255.255.0/0/0 (type=4), 
    remote_proxy= 172.16.2.0/255.255.255.0/0/0 (type=4),
    protocol= ESP, transform= esp-des esp-md5-hmac  (Tunnel), 
    lifedur= 0s and 0kb, 
    spi= 0x0(0), conn_id= 0, keysize= 0, flags= 0x2
*Jun 27 09:50:01.403: IPSEC(kei_proxy): head = mymap, map->ivrf = ,
                      kei->ivrf = 
*Jun 27 09:50:01.403: ISAKMP:(0:1:SW:1): processing NONCE payload. 
                      message ID = 1689610294
*Jun 27 09:50:01.403: ISAKMP:(0:1:SW:1): processing ID payload. 
                      message ID = 1689610294
*Jun 27 09:50:01.403: ISAKMP:(0:1:SW:1): processing ID payload. 
                      message ID = 1689610294
*Jun 27 09:50:01.403: ISAKMP:(0:1:SW:1): asking for 1 spis from ipsec
*Jun 27 09:50:01.403: ISAKMP:(0:1:SW:1):Node 1689610294, Input = 
                      IKE_MESG_FROM_PEER, IKE_QM_EXCH
*Jun 27 09:50:01.403: ISAKMP:(0:1:SW:1):Old State = IKE_QM_READY  
                       New State = IKE_QM_SPI_STARVE
*Jun 27 09:50:01.443: IPSEC(key_engine): got a queue event with 1 kei messages
*Jun 27 09:50:01.443: IPSEC(spi_response): getting spi 3052955580 for SA 
        from 209.165.200.2   to 209.165.201.2   for prot 3
*Jun 27 09:50:01.463: ISAKMP: received ke message (2/1)
*Jun 27 09:50:01.971: ISAKMP:(0:1:SW:1): sending packet to 209.165.201.2 
                      my_port 500 peer_port 500 (R) QM_IDLE      
*Jun 27 09:50:01.971: ISAKMP:(0:1:SW:1):Node 1689610294, Input = 
                      IKE_MESG_FROM_IPSEC, IKE_SPI_REPLY
*Jun 27 09:50:01.971: ISAKMP:(0:1:SW:1):Old State = IKE_QM_SPI_STARVE  
                      New State = IKE_QM_R_QM2
*Jun 27 09:50:02.303: ISAKMP (0:134217729): received packet from 209.165.201.2 
                       dport 500 sport 500 Global (R) QM_IDLE      
*Jun 27 09:50:02.303: IPSec: Flow_switching Allocated flow for flow_id 
                      134217735 
*Jun 27 09:50:02.303: IPSec: Flow_switching Allocated flow for flow_id 134217736 
*Jun 27 09:50:03.203: %CRYPTO-5-SESSION_STATUS: Crypto tunnel is UP  .  
                      Peer 209.165.201.2:500       Id: 172.16.1.2
*Jun 27 09:50:03.203: ISAKMP: Locking peer struct 0x2C50328, IPSEC refcount 
                       1 for for stuff_ke
*Jun 27 09:50:03.203: ISAKMP:(0:1:SW:1): Creating IPSec SAs
*Jun 27 09:50:03.203:         inbound SA from 209.165.201.2 to 209.165.200.2 
                              (f/i)  0/ 0
                              (proxy 172.16.2.0 to 192.168.1.0)
*Jun 27 09:50:03.203:         has spi 0xB5F867BC and conn_id 2000 and flags 2
*Jun 27 09:50:03.203:         lifetime of 3600 seconds
*Jun 27 09:50:03.203:         lifetime of 4608000 kilobytes
*Jun 27 09:50:03.203:         has client flags 0x0
*Jun 27 09:50:03.203:         outbound SA from 209.165.200.2 to 209.165.201.2 
                               (f/i) 0/0
                              (proxy 192.168.1.0 to 172.16.2.0)
*Jun 27 09:50:03.203:         has spi -392560059 and conn_id 2001 and flags A
*Jun 27 09:50:03.203:         lifetime of 3600 seconds
*Jun 27 09:50:03.203:         lifetime of 4608000 kilobytes
*Jun 27 09:50:03.203:         has client flags 0x0
*Jun 27 09:50:03.203: ISAKMP:(0:1:SW:1):deleting node 1689610294 error 
                      FALSE reason "quick mode done (await)"
*Jun 27 09:50:03.203: ISAKMP:(0:1:SW:1):Node 1689610294, Input = 
                     IKE_MESG_FROM_PEER, IKE_QM_EXCH
*Jun 27 09:50:03.203: ISAKMP:(0:1:SW:1):Old State = IKE_QM_R_QM2  
                       New State = IKE_QM_PHASE2_COMPLETE
*Jun 27 09:50:03.231: IPSEC(key_engine): got a queue event with 2 kei messages
*Jun 27 09:50:03.231: IPSEC(initialize_sas): ,
  (key eng. msg.) INBOUND local= 209.165.200.2, remote= 209.165.201.2, 
    local_proxy= 192.168.1.0/255.255.255.0/0/0 (type=4), 
    remote_proxy= 172.16.2.0/255.255.255.0/0/0 (type=4),
    protocol= ESP, transform= esp-des esp-md5-hmac  (Tunnel), 
    lifedur= 3600s and 4608000kb, 
    spi= 0xB5F867BC(3052955580), conn_id= 134219728, keysize= 0, flags= 0x2
*Jun 27 09:50:03.231: IPSEC(initialize_sas): ,
  (key eng. msg.) OUTBOUND local= 209.165.200.2, remote= 209.165.201.2, 
    local_proxy= 192.168.1.0/255.255.255.0/0/0 (type=4), 
    remote_proxy= 172.16.2.0/255.255.255.0/0/0 (type=4),
    protocol= ESP, transform= esp-des esp-md5-hmac  (Tunnel), 
    lifedur= 3600s and 4608000kb, 
    spi= 0xE89A0245(3902407237), conn_id= 134219729, keysize= 0, flags= 0xA
*Jun 27 09:50:03.231: IPSEC(kei_proxy): head = mymap, map->ivrf = , kei->ivrf = 
*Jun 27 09:50:03.231: IPSEC(crypto_ipsec_sa_find_ident_head): 
                      reconnecting with the same proxies and 209.165.201.2
*Jun 27 09:50:03.231: IPSEC(mtree_add_ident): src 192.168.1.0, 
                      dest 172.16.2.0, dest_port 0

*Jun 27 09:50:03.231: IPSEC(create_sa): sa created,
  (sa) sa_dest= 209.165.200.2, sa_prot= 50, 
    sa_spi= 0xB5F867BC(3052955580), 
    sa_trans= esp-des esp-md5-hmac , sa_conn_id= 134219728
*Jun 27 09:50:03.231: IPSEC(create_sa): sa created,
  (sa) sa_dest= 209.165.201.2, sa_prot= 50, 
    sa_spi= 0xE89A0245(3902407237), 
    sa_trans= esp-des esp-md5-hmac , sa_conn_id= 134219729

*Jun 27 09:50:53.231: ISAKMP:(0:1:SW:1):purging node 1689610294

VPN-Gateway2#debug crypto ipsec
Crypto IPSEC debugging is on
VPN-Gateway2#debug crypto isakmp
Crypto ISAKMP debugging is on
VPN-Gateway2#show debug
Cryptographic Subsystem:
  Crypto ISAKMP debugging is on
  Crypto IPSEC debugging is on
VPN-Gateway2#

 
!--- These debugs appeared after a ping !--- was attempted from PC2 to PC1.


*Jun 27 09:49:57.799: IPSEC(sa_request): ,
  (key eng. msg.) OUTBOUND local= 172.16.1.2, remote= 209.165.200.2, 
    local_proxy= 172.16.2.0/255.255.255.0/0/0 (type=4), 
    remote_proxy= 192.168.1.0/255.255.255.0/0/0 (type=4),
    protocol= ESP, transform= esp-des esp-md5-hmac  (Tunnel), 
    lifedur= 3600s and 4608000kb, 
    spi= 0xE89A0245(3902407237), conn_id= 0, keysize= 0, flags= 0x400A
*Jun 27 09:49:57.807: ISAKMP: received ke message (1/1)
*Jun 27 09:49:57.807: ISAKMP:(0:0:N/A:0): SA request profile is (NULL)
*Jun 27 09:49:57.807: ISAKMP: Created a peer struct for 209.165.200.2, 
                      peer port 500
*Jun 27 09:49:57.807: ISAKMP: Locking peer struct 0x2BEDC78, IKE refcount 
                      1 for isakmp_initiator
*Jun 27 09:49:57.807: ISAKMP: local port 500, remote port 500
*Jun 27 09:49:57.839: ISAKMP: set new node 0 to QM_IDLE      
*Jun 27 09:49:57.839: insert sa successfully sa = 2CB1E80
*Jun 27 09:49:57.839: ISAKMP:(0:1:SW:1):Can not start Aggressive mode, 
                       trying Main mode.
*Jun 27 09:49:57.839: ISAKMP: Looking for a matching key for 209.165.200.2 
                      in default : success
*Jun 27 09:49:57.839: ISAKMP:(0:1:SW:1):found peer pre-shared key matching 
                       209.165.200.2
*Jun 27 09:49:57.839: ISAKMP:(0:1:SW:1):Input = IKE_MESG_FROM_IPSEC, 
                       IKE_SA_REQ_MM
*Jun 27 09:49:57.839: ISAKMP:(0:1:SW:1):Old State = IKE_READY  
                      New State = IKE_I_MM1 

*Jun 27 09:49:57.839: ISAKMP:(0:1:SW:1): beginning Main Mode exchange
*Jun 27 09:49:57.839: ISAKMP:(0:1:SW:1): sending packet to 209.165.200.2 
                      my_port 500 peer_port 500 (I) MM_NO_STATE
*Jun 27 09:49:59.099: ISAKMP (0:134217729): received packet from 209.165.200.2 
                      dport 500 sport 500 Global (I) MM_NO_STATE
*Jun 27 09:49:59.099: ISAKMP:(0:1:SW:1):Input = IKE_MESG_FROM_PEER, IKE_MM_EXCH
*Jun 27 09:49:59.099: ISAKMP:(0:1:SW:1):Old State = IKE_I_MM1  New State = 
                      IKE_I_MM2 

*Jun 27 09:49:59.139: ISAKMP:(0:1:SW:1): processing SA payload. message ID = 0
*Jun 27 09:49:59.139: ISAKMP: Looking for a matching key for 209.165.200.2 
                       in default : success
*Jun 27 09:49:59.139: ISAKMP:(0:1:SW:1):found peer pre-shared key matching 
                       209.165.200.2
*Jun 27 09:49:59.139: ISAKMP:(0:1:SW:1): local preshared key found
*Jun 27 09:49:59.139: ISAKMP : Scanning profiles for xauth ...
*Jun 27 09:49:59.139: ISAKMP:(0:1:SW:1):Checking ISAKMP transform 1 against 
                       priority 10 policy
*Jun 27 09:49:59.139: ISAKMP:      encryption DES-CBC
*Jun 27 09:49:59.139: ISAKMP:      hash SHA
*Jun 27 09:49:59.139: ISAKMP:      default group 1
*Jun 27 09:49:59.139: ISAKMP:      auth pre-share
*Jun 27 09:49:59.139: ISAKMP:      life type in seconds
*Jun 27 09:49:59.139: ISAKMP:      life duration (VPI) of  0x0 0x1 0x51 0x80 
*Jun 27 09:49:59.139: ISAKMP:(0:1:SW:1):atts are acceptable. Next payload is 0
*Jun 27 09:49:59.139: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                      IKE_PROCESS_MAIN_MODE
*Jun 27 09:49:59.139: ISAKMP:(0:1:SW:1):Old State = IKE_I_MM2  New State = 
                      IKE_I_MM2 

*Jun 27 09:49:59.259: ISAKMP:(0:1:SW:1): sending packet to 209.165.200.2 
                      my_port 500 peer_port 500 (I) MM_SA_SETUP
*Jun 27 09:49:59.259: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                      IKE_PROCESS_COMPLETE
*Jun 27 09:49:59.259: ISAKMP:(0:1:SW:1):Old State = IKE_I_MM2  New State = 
                       IKE_I_MM3 

*Jun 27 09:49:59.919: ISAKMP (0:134217729): received packet from 209.165.200.2 
                       dport 500 sport 500 Global (I) MM_SA_SETUP
*Jun 27 09:49:59.919: ISAKMP:(0:1:SW:1):Input = IKE_MESG_FROM_PEER, IKE_MM_EXCH
*Jun 27 09:49:59.919: ISAKMP:(0:1:SW:1):Old State = IKE_I_MM3  
                       New State = IKE_I_MM4 

*Jun 27 09:49:59.947: ISAKMP:(0:1:SW:1): processing KE payload. message ID = 0
*Jun 27 09:49:59.947: ISAKMP:(0:1:SW:1): processing NONCE payload. message ID = 0
*Jun 27 09:49:59.947: ISAKMP: Looking for a matching key for 209.165.200.2 
                      in default : success
*Jun 27 09:49:59.947: ISAKMP:(0:1:SW:1):found peer pre-shared key matching 
                      209.165.200.2
*Jun 27 09:49:59.947: ISAKMP:(0:1:SW:1):SKEYID state generated
*Jun 27 09:49:59.947: ISAKMP:(0:1:SW:1): processing vendor id payload
*Jun 27 09:49:59.947: ISAKMP:(0:1:SW:1): vendor ID is Unity
*Jun 27 09:49:59.947: ISAKMP:(0:1:SW:1): processing vendor id payload
*Jun 27 09:49:59.947: ISAKMP:(0:1:SW:1): vendor ID is DPD
*Jun 27 09:49:59.947: ISAKMP:(0:1:SW:1): processing vendor id payload
*Jun 27 09:49:59.947: ISAKMP:(0:1:SW:1): speaking to another IOS box!
*Jun 27 09:49:59.947: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                      IKE_PROCESS_MAIN_MODE
*Jun 27 09:49:59.947: ISAKMP:(0:1:SW:1):Old State = IKE_I_MM4  
                       New State = IKE_I_MM4 

*Jun 27 09:50:00.059: ISAKMP:(0:1:SW:1):Send initial contact
*Jun 27 09:50:00.059: ISAKMP:(0:1:SW:1):SA is doing pre-shared key 
                        authentication using id type ID_IPV4_ADDR
*Jun 27 09:50:00.059: ISAKMP (0:134217729): ID payload 
        next-payload : 8
        type         : 1 
        address      : 172.16.1.2 
        protocol     : 17 
        port         : 500 
        length       : 12
*Jun 27 09:50:00.059: ISAKMP:(0:1:SW:1):Total payload length: 12
*Jun 27 09:50:00.059: ISAKMP:(0:1:SW:1): sending packet to 209.165.200.2 
                       my_port 500 peer_port 500 (I) MM_KEY_EXCH
*Jun 27 09:50:00.059: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                      IKE_PROCESS_COMPLETE
*Jun 27 09:50:00.059: ISAKMP:(0:1:SW:1):Old State = IKE_I_MM4  
                       New State = IKE_I_MM5 

*Jun 27 09:50:00.827: ISAKMP (0:134217729): received packet from 209.165.200.2 
                      dport 500 sport 500 Global (I) MM_KEY_EXCH
*Jun 27 09:50:00.827: ISAKMP:(0:1:SW:1):Input = IKE_MESG_FROM_PEER, IKE_MM_EXCH
*Jun 27 09:50:00.827: ISAKMP:(0:1:SW:1):Old State = IKE_I_MM5  
                       New State = IKE_I_MM6 

*Jun 27 09:50:00.859: ISAKMP:(0:1:SW:1): processing ID payload. message ID = 0
*Jun 27 09:50:00.859: ISAKMP (0:134217729): ID payload 
        next-payload : 8
        type         : 1 
        address      : 209.165.200.2 
        protocol     : 17 
        port         : 500 
        length       : 12
*Jun 27 09:50:00.859: ISAKMP:(0:1:SW:1): processing HASH payload. message ID = 0
*Jun 27 09:50:00.859: ISAKMP:(0:1:SW:1):SA authentication status:
        authenticated
*Jun 27 09:50:00.859: ISAKMP:(0:1:SW:1):SA has been authenticated 
                      with 209.165.200.2
*Jun 27 09:50:00.859: ISAKMP:(0:1:SW:1):: peer matches *none* of the profiles
*Jun 27 09:50:00.859: ISAKMP: Trying to insert a peer 172.16.1.2/209.165.200.2/500/,
                        and inserted successfully.
*Jun 27 09:50:00.859: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                      IKE_PROCESS_MAIN_MODE
*Jun 27 09:50:00.859: ISAKMP:(0:1:SW:1):Old State = IKE_I_MM6  
                       New State = IKE_I_MM6 

*Jun 27 09:50:00.919: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                      IKE_PROCESS_COMPLETE
*Jun 27 09:50:00.919: ISAKMP:(0:1:SW:1):Old State = IKE_I_MM6  
                        New State = IKE_P1_COMPLETE 

*Jun 27 09:50:00.959: ISAKMP:(0:1:SW:1):beginning Quick Mode exchange, 
                       M-ID of 1689610294
*Jun 27 09:50:01.007: ISAKMP:(0:1:SW:1): sending packet to 209.165.200.2 
                       my_port 500 peer_port 500 (I) QM_IDLE      
*Jun 27 09:50:01.007: ISAKMP:(0:1:SW:1):Node 1689610294, Input = 
                       IKE_MESG_INTERNAL, IKE_INIT_QM
*Jun 27 09:50:01.007: ISAKMP:(0:1:SW:1):Old State = IKE_QM_READY  
                       New State = IKE_QM_I_QM1
*Jun 27 09:50:01.007: ISAKMP:(0:1:SW:1):Input = IKE_MESG_INTERNAL, 
                      IKE_PHASE1_COMPLETE
*Jun 27 09:50:01.007: ISAKMP:(0:1:SW:1):Old State = IKE_P1_COMPLETE  
                       New State = IKE_P1_COMPLETE 

*Jun 27 09:50:01.839: ISAKMP (0:134217729): received packet from 
                      209.165.200.2 dport 500 sport 500 Global (I) QM_IDLE      
*Jun 27 09:50:01.839: ISAKMP:(0:1:SW:1): processing HASH payload. 
                      message ID = 1689610294
*Jun 27 09:50:01.839: ISAKMP:(0:1:SW:1): processing SA payload. 
                      message ID = 1689610294
*Jun 27 09:50:01.839: ISAKMP:(0:1:SW:1):Checking IPSec proposal 1
*Jun 27 09:50:01.839: ISAKMP: transform 1, ESP_DES
*Jun 27 09:50:01.839: ISAKMP:   attributes in transform:
*Jun 27 09:50:01.839: ISAKMP:      encaps is 1 (Tunnel)
*Jun 27 09:50:01.839: ISAKMP:      SA life type in seconds
*Jun 27 09:50:01.839: ISAKMP:      SA life duration (basic) of 3600
*Jun 27 09:50:01.839: ISAKMP:      SA life type in kilobytes
*Jun 27 09:50:01.839: ISAKMP:      SA life duration (VPI) of  0x0 0x46 0x50 0x0 
*Jun 27 09:50:01.839: ISAKMP:      authenticator is HMAC-MD5
*Jun 27 09:50:01.839: ISAKMP:(0:1:SW:1):atts are acceptable.
*Jun 27 09:50:01.839: IPSEC(validate_proposal_request): proposal part #1,
  (key eng. msg.) INBOUND local= 172.16.1.2, remote= 209.165.200.2, 
    local_proxy= 172.16.2.0/255.255.255.0/0/0 (type=4), 
    remote_proxy= 192.168.1.0/255.255.255.0/0/0 (type=4),
    protocol= ESP, transform= esp-des esp-md5-hmac  (Tunnel), 
    lifedur= 0s and 0kb, 
    spi= 0x0(0), conn_id= 0, keysize= 0, flags= 0x2
*Jun 27 09:50:01.839: IPSEC(kei_proxy): head = mymap, map->ivrf = ,
                           kei->ivrf = 
*Jun 27 09:50:01.839: ISAKMP:(0:1:SW:1): processing NONCE payload. 
                       message ID = 1689610294
*Jun 27 09:50:01.839: ISAKMP:(0:1:SW:1): processing ID payload. 
                       message ID = 1689610294
*Jun 27 09:50:01.839: ISAKMP:(0:1:SW:1): processing ID payload. 
                        message ID = 1689610294
*Jun 27 09:50:01.839: IPSec: Flow_switching Allocated flow for flow_id 134217731 
*Jun 27 09:50:01.839: IPSec: Flow_switching Allocated flow for flow_id 134217732 
*Jun 27 09:50:01.899: %CRYPTO-5-SESSION_STATUS: Crypto tunnel is UP  .  
                      Peer 209.165.200.2:500       Id: 209.165.200.2
*Jun 27 09:50:01.899: ISAKMP: Locking peer struct 0x2BEDC78, IPSEC
                       refcount 1 for for stuff_ke
*Jun 27 09:50:01.899: ISAKMP:(0:1:SW:1): Creating IPSec SAs
*Jun 27 09:50:01.899:         inbound SA from 209.165.200.2 to 172.16.1.2 
                               (f/i)  0/ 0
                              (proxy 192.168.1.0 to 172.16.2.0)
*Jun 27 09:50:01.899:         has spi 0xE89A0245 and conn_id 2000 and flags 2
*Jun 27 09:50:01.899:         lifetime of 3600 seconds
*Jun 27 09:50:01.899:         lifetime of 4608000 kilobytes
*Jun 27 09:50:01.899:         has client flags 0x0
*Jun 27 09:50:01.899:         outbound SA from 172.16.1.2 to 209.165.200.2 
                               (f/i) 0/0
                                (proxy 172.16.2.0 to 192.168.1.0)
*Jun 27 09:50:01.899:         has spi -1242011716 and conn_id 2001 and flags A
*Jun 27 09:50:01.899:         lifetime of 3600 seconds
*Jun 27 09:50:01.899:         lifetime of 4608000 kilobytes
*Jun 27 09:50:01.899:         has client flags 0x0
*Jun 27 09:50:01.899: ISAKMP:(0:1:SW:1): sending packet to 209.165.200.2 
                       my_port 500 peer_port 500 (I) QM_IDLE      
*Jun 27 09:50:01.899: ISAKMP:(0:1:SW:1):deleting node 1689610294 error 
                       FALSE reason ""
*Jun 27 09:50:01.899: ISAKMP:(0:1:SW:1):Node 1689610294, Input = 
                       IKE_MESG_FROM_PEER, IKE_QM_EXCH
*Jun 27 09:50:01.899: ISAKMP:(0:1:SW:1):Old State = IKE_QM_I_QM1  
                        New State = IKE_QM_PHASE2_COMPLETE
*Jun 27 09:50:01.907: IPSEC(key_engine): got a queue event with 2 kei messages
*Jun 27 09:50:01.907: IPSEC(initialize_sas): ,
  (key eng. msg.) INBOUND local= 172.16.1.2, remote= 209.165.200.2, 
    local_proxy= 172.16.2.0/255.255.255.0/0/0 (type=4), 
    remote_proxy= 192.168.1.0/255.255.255.0/0/0 (type=4),
    protocol= ESP, transform= esp-des esp-md5-hmac  (Tunnel), 
    lifedur= 3600s and 4608000kb, 
    spi= 0xE89A0245(3902407237), conn_id= 134219728, keysize= 0, flags= 0x2
*Jun 27 09:50:01.907: IPSEC(initialize_sas): ,
  (key eng. msg.) OUTBOUND local= 172.16.1.2, remote= 209.165.200.2, 
    local_proxy= 172.16.2.0/255.255.255.0/0/0 (type=4), 
    remote_proxy= 192.168.1.0/255.255.255.0/0/0 (type=4),
    protocol= ESP, transform= esp-des esp-md5-hmac  (Tunnel), 
    lifedur= 3600s and 4608000kb, 
    spi= 0xB5F867BC(3052955580), conn_id= 134219729, keysize= 0,flags= 0xA
*Jun 27 09:50:01.907: IPSEC(kei_proxy): head = mymap, map->ivrf = , kei->ivrf = 
*Jun 27 09:50:01.907: IPSEC(crypto_ipsec_sa_find_ident_head): 
                      reconnecting with the same proxies and 209.165.200.2
*Jun 27 09:50:01.907: IPSEC(mtree_add_ident): src 172.16.2.0, dest 
                       192.168.1.0, dest_port 0

*Jun 27 09:50:01.907: IPSEC(create_sa): sa created,
  (sa) sa_dest= 172.16.1.2, sa_prot= 50, 
    sa_spi= 0xE89A0245(3902407237), 
    sa_trans= esp-des esp-md5-hmac , sa_conn_id= 134219728
*Jun 27 09:50:01.907: IPSEC(create_sa): sa created,
  (sa) sa_dest= 209.165.200.2, sa_prot= 50, 
    sa_spi= 0xB5F867BC(3052955580), 
    sa_trans= esp-des esp-md5-hmac , sa_conn_id= 134219729

*Jun 27 09:50:51.927: ISAKMP:(0:1:SW:1):purging node 1689610294


PAT-Router#debug ip nat detail
IP NAT detailed debugging is on
PAT-Router#show debug
Generic IP:
  IP NAT detailed debugging is on
PAT-Router#

!--- The "i" in this line indicates the packet is traveling from the !--- inside to the outside (from a NAT perspective) interface. The number in !--- the brackets is the identification number in the IP packet. This is !--- useful when correlating information with sniffer traces taken with a !--- network analyzer while troubleshooting problems.

*Jun 27 09:49:57.727: NAT*: i: udp (172.16.1.2, 500) -> (209.165.200.2, 500) [94]

!--- The "s" in this line shows the source address of the packet and how it is !--- being translated. 

*Jun 27 09:49:57.727: NAT*: s=172.16.1.2->209.165.201.2, d=209.165.200.2 [94]
*Jun 27 09:49:58.927: NAT*: o: udp (209.165.200.2, 500) -> (209.165.201.2, 500) [100]     
*Jun 27 09:49:58.927: NAT*: s=209.165.200.2, d=209.165.201.2->172.16.1.2 [100]
*Jun 27 09:49:59.147: NAT*: i: udp (172.16.1.2, 500) -> (209.165.200.2, 500) [95]
*Jun 27 09:49:59.147: NAT*: s=172.16.1.2->209.165.201.2, d=209.165.200.2 [95]
*Jun 27 09:49:59.755: NAT*: o: udp (209.165.200.2, 500) -> (209.165.201.2, 500) [101]
*Jun 27 09:49:59.755: NAT*: s=209.165.200.2, d=209.165.201.2->172.16.1.2 [101]
*Jun 27 09:49:59.947: NAT*: i: udp (172.16.1.2, 500) -> (209.165.200.2, 500) [96]
*Jun 27 09:49:59.947: NAT*: s=172.16.1.2->209.165.201.2, d=209.165.200.2 [96]
*Jun 27 09:50:00.667: NAT*: o: udp (209.165.200.2, 500) -> (209.165.201.2, 500) [102]
*Jun 27 09:50:00.667: NAT*: s=209.165.200.2, d=209.165.201.2->172.16.1.2 [102]
*Jun 27 09:50:00.895: NAT*: i: udp (172.16.1.2, 500) -> (209.165.200.2, 500) [97]
*Jun 27 09:50:00.895: NAT*: s=172.16.1.2->209.165.201.2, d=209.165.200.2 [97]
*Jun 27 09:50:01.679: NAT*: o: udp (209.165.200.2, 500) -> (209.165.201.2, 500) [103]
*Jun 27 09:50:01.679: NAT*: s=209.165.200.2, d=209.165.201.2->172.16.1.2 [103]
*Jun 27 09:50:01.787: NAT*: i: udp (172.16.1.2, 500) -> (209.165.200.2, 500) [98]
*Jun 27 09:50:01.787: NAT*: s=172.16.1.2->209.165.201.2, d=209.165.200.2 [98]
*Jun 27 09:50:23.667: NAT*: i: esp (172.16.1.2, 26556) -> (209.165.200.2, 0) [99]
*Jun 27 09:50:23.667: NAT*: s=172.16.1.2->209.165.201.2, d=209.165.200.2 [99]
*Jun 27 09:50:23.715: NAT*: o: esp (209.165.200.2, -392560059) -> (209.165.201.2, 0) [104]     
*Jun 27 09:50:23.715: NAT*: s=209.165.200.2, d=209.165.201.2->172.16.1.2 [104]
*Jun 27 09:50:23.787: NAT*: i: esp (172.16.1.2, 26556) -> (209.165.200.2, 0) [100]
*Jun 27 09:50:23.787: NAT*: s=172.16.1.2->209.165.201.2, d=209.165.200.2 [100]
*Jun 27 09:50:23.847: NAT*: o: esp (209.165.200.2, 581) -> (209.165.201.2, 0) [105]
*Jun 27 09:50:23.847: NAT*: s=209.165.200.2, d=209.165.201.2->172.16.1.2 [105]
*Jun 27 09:50:23.915: NAT*: i: esp (172.16.1.2, 26556) -> (209.165.200.2, 0) [101]
*Jun 27 09:50:23.915: NAT*: s=172.16.1.2->209.165.201.2, d=209.165.200.2 [101]
*Jun 27 09:50:23.967: NAT*: o: esp (209.165.200.2, 581) -> (209.165.201.2, 0) [106]
*Jun 27 09:50:23.967: NAT*: s=209.165.200.2, d=209.165.201.2->172.16.1.2 [106]
*Jun 27 09:50:24.047: NAT*: i: esp (172.16.1.2, 26556) -> (209.165.200.2, 0) [102]
*Jun 27 09:50:24.047: NAT*: s=172.16.1.2->209.165.201.2, d=209.165.200.2 [102]
*Jun 27 09:50:24.095: NAT*: o: esp (209.165.200.2, 581) -> (209.165.201.2, 0) [107]
*Jun 27 09:50:24.095: NAT*: s=209.165.200.2, d=209.165.201.2->172.16.1.2 [107]
*Jun 27 09:50:24.207: NAT*: i: esp (172.16.1.2, 26556) -> (209.165.200.2, 0) [103]
*Jun 27 09:50:24.207: NAT*: s=172.16.1.2->209.165.201.2, d=209.165.200.2 [103]
*Jun 27 09:50:24.267: NAT*: o: esp (209.165.200.2, 581) -> (209.165.201.2, 0) [108]
*Jun 27 09:50:24.267: NAT*: s=209.165.200.2, d=209.165.201.2->172.16.1.2 [108]

PAT を実行し LAN 間 IPSec トンネルを通す IOS ルータの設定例

ダウンロードオプション

偏向のない言語

翻訳について

内容

概要

前提条件

要件

使用するコンポーネント

表記法

設定

ネットワーク図

IPSec NAT 透過を伴う場合の設定

IPSec NAT 透過を伴わない場合の設定

確認

IPSec NAT 透過を伴う場合の確認

IPSec NAT 透過を伴わない場合の確認

トラブルシュート

IPSec NAT 透過を伴う場合のトラブルシューティング

IPSec NAT 透過を伴わない場合のトラブルシューティング

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PAT を実行し LAN 間 IPSec トンネルを通す IOS ルータの設定例

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偏向のない言語

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