IP : インターネット キー エクスチェンジ(IKE)

Cisco IOS と strongSwan 間の IKEv1/IKEv2 設定例

2015 年 11 月 26 日 - 機械翻訳について
その他のバージョン: PDFpdf | 英語版 (2015 年 8 月 22 日) | フィードバック

概要

このドキュメントでは、Cisco IOS® strongSwan 間の L2L)の LAN-to-LAN(L2L)VPN の設定例を説明します。 インターネット キー エクスチェンジのバージョン 1(IKEv1)設定とインターネット キー エクスチェンジのバージョン 2(IKEv2)設定の両方が説明されます。

担当者、Michal Garcarz および Olivier Pelerin、Cisco TAC エンジニア。

前提条件

要件

次の項目に関する知識があることが推奨されます。

  • Linux の設定に関する基本的な知識
  • Cisco IOS での VPN 設定に関する知識
  • 次のプロトコルに関する知識:
    • IKEv1
    • IKEv2
    • IPSec(Internet Protocol Security)

使用するコンポーネント

このドキュメントの情報は、次のソフトウェアのバージョンに基づくものです。

  • Cisco IOS リリース 15.3T
  • strongSwan 5.0.4
  • Linux カーネル 3.2.12

設定

ネットワーク図

トポロジは両方の例で同じで、Cisco IOS と strongSwan 間の L2L トンネルです。

トラフィックは、192.168.1.0/24<->192.168.2.0/24 の間で保護されます。

オープン ソース L2L IPSec VPN

セキュアな L2L トンネルを構築するためにインターネット キー エクスチェンジ(IKE)および IPsec プロトコルを使用する複数のオープン ソースのプロジェクトがあります。

  • 無料のセキュアな WAN(freeS/WAN): 履歴、現在保守されていない

  • IPsec ツール: racoon:IKEv2 をサポートしない、古い Linux カーネル 2.6

  • Openswan: 非常に基本的な IKEv2 サポート、古い Linux カーネル 2.6 以前の API、現在保守されていない

  • strongSwan: IKEv2 および EAP/mobility の拡張をサポート、NETKEY API(カーネル 2.6 以降のネイティブ IPsec 実装の名前)を使用する新しい Linux カーネル 3.x、現在保守中、マニュアルも豊富

現在、最も適したオプションは通常 strongSwan です。 これは Openswan の設定に似ていますが、複数のマイナーな相違点があります。 このマニュアルでは strongSwan および Cisco IOS の設定について説明します。

Cisco IOS と strongSwan 間での IKEv1

Cisco IOS の構成

crypto isakmp policy 10
 encr aes
 authentication pre-share
 group 5
crypto isakmp key cisco address 172.16.10.2    

crypto ipsec transform-set TS esp-aes esp-sha-hmac
 mode tunnel

crypto map cmap 10 ipsec-isakmp
 set peer 172.16.10.2
 set transform-set TS
 match address cryptoacl

interface Ethernet0/1
 ip address 192.168.1.1 255.255.255.0

interface Ethernet0/0
 ip address 172.16.10.1 255.255.255.0
 crypto map cmap

ip access-list extended cryptoacl
 permit ip 192.168.1.0 0.0.0.255 192.168.2.0 0.0.0.255

strongSwan 設定

左側は strongSwan に関連し、右側はリモート(この例では Cisco IOS)です。

/etc/ipsec.conf

config setup
        # strictcrlpolicy=yes
        # uniqueids = no

conn %default
        ikelifetime=1440m
        keylife=60m
        rekeymargin=3m
        keyingtries=1
        keyexchange=ikev1
        authby=secret

conn ciscoios
        left=172.16.10.2 #strongswan outside address
        leftsubnet=192.168.2.0/24 #network behind strongswan
        leftid=172.16.10.2 #IKEID sent by strongswan
        leftfirewall=yes
        right=172.16.10.1 #IOS outside address
        rightsubnet=192.168.1.0/24 #network behind IOS
        rightid=172.16.10.1 #IKEID sent by IOS
        auto=add
        ike=aes128-md5-modp1536 #P1: modp1536 = DH group 5
        esp=aes128-sha1 #P2

デフォルトでは、Cisco IOS は IKE ID としてアドレスを使用します。このため、アドレスは「rightid」および「leftid」として使用します。 strongSwan は、Cisco IOS のように、次世代暗号化(スイート B)のサポートするため、AES256 と SHA512 とともに 4096 の Diffie-Hellman(DH)のキーを使用することができます。

自動パラメータには、「add」引数が使用されます。 これは、対象トラフィックを入手した後にトンネルを起動します。 これをすぐに開始するために、「start」引数を使用できます。

/etc/ipsec.secrets

172.16.10.2 172.16.10.1 : PSK cisco

次の例「cisco」では、IKEv1 に関して両方のキーが同じである必要があります。

Cisco IOS と strongSwan 間での IKEv2

Cisco IOS の構成

crypto ikev2 proposal ikev2proposal 
 encryption aes-cbc-128
 integrity sha1
 group 5

crypto ikev2 policy ikev2policy
 match fvrf any
 proposal ikev2proposal

crypto ikev2 keyring keys
 peer strongswan
  address 172.16.10.2
  pre-shared-key local cisco
  pre-shared-key remote cisco
 
crypto ikev2 profile ikev2profile
 match identity remote address 172.16.10.2 255.255.255.255
 authentication remote pre-share
 authentication local pre-share
 keyring local keys

crypto ipsec transform-set TS esp-aes esp-sha-hmac
 mode tunnel

crypto map cmap 10 ipsec-isakmp
 set peer 172.16.10.2
 set transform-set TS
 set ikev2-profile ikev2profile
 match address cryptoacl

interface Ethernet0/1
 ip address 192.168.1.1 255.255.255.0

interface Ethernet0/0
 ip address 172.16.10.1 255.255.255.0
 crypto map cmap

ip access-list extended cryptoacl
 permit ip 192.168.1.0 0.0.0.255 192.168.2.0 0.0.0.255

strongSwan 設定

IKEv1 と比較して次の 2 点だけ変更があります。 keyexchange キーと possibly キー。

/etc/ipsec.conf

config setup
        # strictcrlpolicy=yes
        # uniqueids = no

conn %default
        ikelifetime=1440m
        keylife=60m
        rekeymargin=3m
        keyingtries=1
        keyexchange=ikev1
        authby=secret

conn ciscoios
        left=172.16.10.2
        leftsubnet=192.168.2.0/24
        leftid=172.16.10.2
        leftfirewall=yes
        right=172.16.10.1
        rightsubnet=192.168.1.0/24
        rightid=172.16.10.1
        auto=add
        ike=aes128-sha1-modp1536
        esp=aes128-sha1
        keyexchange=ikev2

/etc/ipsec.secrets

172.16.10.2 : PSK "cisco"
172.16.10.1 : PSK "cisco"

IKEv2 では、各サイトのキーは異なります。

確認

確認手順については「トラブルシューティング」の項を参照してください。

トラブルシューティング

ここでは、設定のトラブルシューティングに役立つ情報について説明します。

Cisco IOS と strongSwan 間での IKEv1

Cisco IOS

R1#ping 192.168.2.1 source e0/1 repeat 1

Cisco IOS によってトリガーされるトンネルの確立


*May 24 18:02:48.464: IPSEC(sa_request): ,
  (key eng. msg.) OUTBOUND local= 172.16.10.1:500, remote= 172.16.10.2:500,
    local_proxy= 192.168.1.0/255.255.255.0/256/0,
    remote_proxy= 192.168.2.0/255.255.255.0/256/0,
    protocol= ESP, transform= esp-aes esp-sha-hmac  (Tunnel),
    lifedur= 3600s and 4608000kb,
    spi= 0x0(0), conn_id= 0, keysize= 128, flags= 0x0
*May 24 18:02:48.465: ISAKMP:(0): SA request profile is (NULL)
*May 24 18:02:48.465: ISAKMP: Created a peer struct for 172.16.10.2, peer port 500
*May 24 18:02:48.465: ISAKMP: New peer created peer = 0xF334E7E0 peer_handle =
0x80000006
*May 24 18:02:48.465: ISAKMP: Locking peer struct 0xF334E7E0, refcount 1 for
isakmp_initiator
*May 24 18:02:48.465: ISAKMP: local port 500, remote port 500
*May 24 18:02:48.465: ISAKMP: set new node 0 to QM_IDLE      
*May 24 18:02:48.465: ISAKMP: Find a dup sa in the avl tree during calling
isadb_insert sa = F49C9890
*May 24 18:02:48.465: ISAKMP:(0):Can not start Aggressive mode, trying Main mode.
*May 24 18:02:48.465: ISAKMP:(0):found peer pre-shared key matching 172.16.10.2
*May 24 18:02:48.465: ISAKMP:(0): constructed NAT-T vendor-rfc3947 ID
*May 24 18:02:48.465: ISAKMP:(0): constructed NAT-T vendor-07 ID
*May 24 18:02:48.465: ISAKMP:(0): constructed NAT-T vendor-03 ID
*May 24 18:02:48.465: ISAKMP:(0): constructed NAT-T vendor-02 ID
*May 24 18:02:48.465: ISAKMP:(0):Input = IKE_MESG_FROM_IPSEC, IKE_SA_REQ_MM
*May 24 18:02:48.465: ISAKMP:(0):Old State = IKE_READY  New State = IKE_I_MM1

*May 24 18:02:48.465: ISAKMP:(0): beginning Main Mode exchange
*May 24 18:02:48.465: ISAKMP:(0): sending packet to 172.16.10.2 my_port 500
peer_port 500 (I) MM_NO_STATE
*May 24 18:02:48.465: ISAKMP:(0):Sending an IKE IPv4 Packet.
*May 24 18:02:48.466: ISAKMP (0): received packet from 172.16.10.2 dport 500
sport 500 Global (I) MM_NO_STATE
*May 24 18:02:48.466: ISAKMP:(0):Input = IKE_MESG_FROM_PEER, IKE_MM_EXCH
*May 24 18:02:48.466: ISAKMP:(0):Old State = IKE_I_MM1  New State = IKE_I_MM2

*May 24 18:02:48.466: ISAKMP:(0): processing SA payload. message ID = 0
*May 24 18:02:48.466: ISAKMP:(0): processing vendor id payload
*May 24 18:02:48.466: ISAKMP:(0): vendor ID seems Unity/DPD but major 215 mismatch
*May 24 18:02:48.466: ISAKMP:(0): vendor ID is XAUTH
*May 24 18:02:48.466: ISAKMP:(0): processing vendor id payload
*May 24 18:02:48.466: ISAKMP:(0): vendor ID is DPD
*May 24 18:02:48.466: ISAKMP:(0): processing vendor id payload
*May 24 18:02:48.466: ISAKMP:(0): vendor ID seems Unity/DPD but major 69 mismatch
*May 24 18:02:48.466: ISAKMP (0): vendor ID is NAT-T RFC 3947
*May 24 18:02:48.466: ISAKMP:(0):found peer pre-shared key matching 172.16.10.2
*May 24 18:02:48.466: ISAKMP:(0): local preshared key found
*May 24 18:02:48.466: ISAKMP : Scanning profiles for xauth ...
*May 24 18:02:48.466: ISAKMP:(0):Checking ISAKMP transform 1 against priority
10 policy
*May 24 18:02:48.466: ISAKMP:      encryption AES-CBC
*May 24 18:02:48.466: ISAKMP:      keylength of 128
*May 24 18:02:48.466: ISAKMP:      hash SHA
*May 24 18:02:48.466: ISAKMP:      default group 5
*May 24 18:02:48.466: ISAKMP:      auth pre-share
*May 24 18:02:48.466: ISAKMP:      life type in seconds
*May 24 18:02:48.466: ISAKMP:      life duration (VPI) of  0x0 0x1 0x51 0x80
*May 24 18:02:48.466: ISAKMP:(0):atts are acceptable. Next payload is 0
*May 24 18:02:48.466: ISAKMP:(0):Acceptable atts:actual life: 0
*May 24 18:02:48.466: ISAKMP:(0):Acceptable atts:life: 0
*May 24 18:02:48.466: ISAKMP:(0):Fill atts in sa vpi_length:4
*May 24 18:02:48.466: ISAKMP:(0):Fill atts in sa life_in_seconds:86400
*May 24 18:02:48.466: ISAKMP:(0):Returning Actual lifetime: 86400
*May 24 18:02:48.466: ISAKMP:(0)::Started lifetime timer: 86400.
          
*May 24 18:02:48.466: ISAKMP:(0): processing vendor id payload
*May 24 18:02:48.466: ISAKMP:(0): vendor ID seems Unity/DPD but major 215 mismatch
*May 24 18:02:48.466: ISAKMP:(0): vendor ID is XAUTH
*May 24 18:02:48.466: ISAKMP:(0): processing vendor id payload
*May 24 18:02:48.466: ISAKMP:(0): vendor ID is DPD
*May 24 18:02:48.466: ISAKMP:(0): processing vendor id payload
*May 24 18:02:48.466: ISAKMP:(0): vendor ID seems Unity/DPD but major 69 mismatch
*May 24 18:02:48.466: ISAKMP (0): vendor ID is NAT-T RFC 3947
*May 24 18:02:48.466: ISAKMP:(0):Input = IKE_MESG_INTERNAL, IKE_PROCESS_MAIN_MODE
*May 24 18:02:48.466: ISAKMP:(0):Old State = IKE_I_MM2  New State = IKE_I_MM2

*May 24 18:02:48.466: ISAKMP:(0): sending packet to 172.16.10.2 my_port 500
peer_port 500 (I) MM_SA_SETUP
*May 24 18:02:48.466: ISAKMP:(0):Sending an IKE IPv4 Packet.
*May 24 18:02:48.466: ISAKMP:(0):Input = IKE_MESG_INTERNAL, IKE_PROCESS_COMPLETE
*May 24 18:02:48.466: ISAKMP:(0):Old State = IKE_I_MM2  New State = IKE_I_MM3

*May 24 18:02:48.474: ISAKMP (0): received packet from 172.16.10.2 dport 500 sport
500 Global (I) MM_SA_SETUP
*May 24 18:02:48.474: ISAKMP:(0):Input = IKE_MESG_FROM_PEER, IKE_MM_EXCH
*May 24 18:02:48.474: ISAKMP:(0):Old State = IKE_I_MM3  New State = IKE_I_MM4

*May 24 18:02:48.474: ISAKMP:(0): processing KE payload. message ID = 0
*May 24 18:02:48.482: ISAKMP:(0): processing NONCE payload. message ID = 0
*May 24 18:02:48.482: ISAKMP:(0):found peer pre-shared key matching 172.16.10.2
*May 24 18:02:48.482: ISAKMP:received payload type 20
*May 24 18:02:48.482: ISAKMP (1003): His hash no match - this node outside NAT
*May 24 18:02:48.482: ISAKMP:received payload type 20
*May 24 18:02:48.482: ISAKMP (1003): No NAT Found for self or peer
*May 24 18:02:48.482: ISAKMP:(1003):Input = IKE_MESG_INTERNAL, IKE_PROCESS_MAIN_MODE
*May 24 18:02:48.482: ISAKMP:(1003):Old State = IKE_I_MM4  New State = IKE_I_MM4

*May 24 18:02:48.482: ISAKMP:(1003):Send initial contact
*May 24 18:02:48.482: ISAKMP:(1003):SA is doing pre-shared key authentication using
id type ID_IPV4_ADDR
*May 24 18:02:48.482: ISAKMP (1003): ID payload
        next-payload : 8
        type         : 1
        address      : 172.16.10.1
        protocol     : 17
        port         : 500
        length       : 12
*May 24 18:02:48.482: ISAKMP:(1003):Total payload length: 12
*May 24 18:02:48.482: ISAKMP:(1003): sending packet to 172.16.10.2 my_port 500
peer_port 500 (I) MM_KEY_EXCH
*May 24 18:02:48.482: ISAKMP:(1003):Sending an IKE IPv4 Packet.
*May 24 18:02:48.482: ISAKMP:(1003):Input = IKE_MESG_INTERNAL, IKE_PROCESS_COMPLETE
*May 24 18:02:48.482: ISAKMP:(1003):Old State = IKE_I_MM4  New State = IKE_I_MM5

*May 24 18:02:48.483: ISAKMP (1003): received packet from 172.16.10.2 dport 500
sport 500 Global (I) MM_KEY_EXCH
*May 24 18:02:48.483: ISAKMP:(1003): processing ID payload. message ID = 0
*May 24 18:02:48.483: ISAKMP (1003): ID payload
        next-payload : 8
        type         : 1
        address      : 172.16.10.2
        protocol     : 0
        port         : 0
        length       : 12
*May 24 18:02:48.483: ISAKMP:(0):: peer matches *none* of the profiles
*May 24 18:02:48.483: ISAKMP:(1003): processing HASH payload. message ID = 0
*May 24 18:02:48.483: ISAKMP:(1003):SA authentication status:
        authenticated
*May 24 18:02:48.483: ISAKMP:(1003):SA has been authenticated with 172.16.10.2
*May 24 18:02:48.483: ISAKMP: Trying to insert a peer 172.16.10.1/172.16.10.2/500/,
  and inserted successfully F334E7E0.
*May 24 18:02:48.483: ISAKMP:(1003):Input = IKE_MESG_FROM_PEER, IKE_MM_EXCH
*May 24 18:02:48.483: ISAKMP:(1003):Old State = IKE_I_MM5  New State = IKE_I_MM6

*May 24 18:02:48.483: ISAKMP:(1003):Input = IKE_MESG_INTERNAL, IKE_PROCESS_MAIN_MODE
*May 24 18:02:48.483: ISAKMP:(1003):Old State = IKE_I_MM6  New State = IKE_I_MM6

*May 24 18:02:48.487: ISAKMP:(1003):Input = IKE_MESG_INTERNAL, IKE_PROCESS_COMPLETE
*May 24 18:02:48.487: ISAKMP:(1003):Old State = IKE_I_MM6  New State = IKE_P1_COMPLETE

*May 24 18:02:48.487: ISAKMP:(1003):beginning Quick Mode exchange, M-ID of 2605730229
*May 24 18:02:48.487: ISAKMP:(1003):QM Initiator gets spi
*May 24 18:02:48.487: ISAKMP:(1003): sending packet to 172.16.10.2 my_port 500
peer_port 500 (I) QM_IDLE      
*May 24 18:02:48.487: ISAKMP:(1003):Sending an IKE IPv4 Packet.
*May 24 18:02:48.488: ISAKMP:(1003):Node 2605730229, Input = IKE_MESG_INTERNAL,
IKE_INIT_QM
*May 24 18:02:48.488: ISAKMP:(1003):Old State = IKE_QM_READY  New State = IKE_QM_I_QM1
*May 24 18:02:48.488: ISAKMP:(1003):Input = IKE_MESG_INTERNAL, IKE_PHASE1_COMPLETE
*May 24 18:02:48.488: ISAKMP:(1003):Old State = IKE_P1_COMPLETE  New State =
IKE_P1_COMPLETE

*May 24 18:02:48.488: ISAKMP (1003): received packet from 172.16.10.2 dport 500
sport 500 Global (I) QM_IDLE      
*May 24 18:02:48.488: ISAKMP:(1003): processing HASH payload. message ID = 2605730229
*May 24 18:02:48.488: ISAKMP:(1003): processing SA payload. message ID = 2605730229
*May 24 18:02:48.488: ISAKMP:(1003):Checking IPSec proposal 1
*May 24 18:02:48.488: ISAKMP: transform 1, ESP_AES
*May 24 18:02:48.488: ISAKMP:   attributes in transform:
*May 24 18:02:48.488: ISAKMP:      key length is 128
*May 24 18:02:48.488: ISAKMP:      authenticator is HMAC-SHA
*May 24 18:02:48.488: ISAKMP:      encaps is 1 (Tunnel)
*May 24 18:02:48.488: ISAKMP:      SA life type in seconds
*May 24 18:02:48.488: ISAKMP:      SA life duration (basic) of 3600
*May 24 18:02:48.488: ISAKMP:      SA life type in kilobytes
*May 24 18:02:48.488: ISAKMP:      SA life duration (VPI) of  0x0 0x46 0x50 0x0
*May 24 18:02:48.488: ISAKMP:(1003):atts are acceptable.
*May 24 18:02:48.488: IPSEC(validate_proposal_request): proposal part #1
*May 24 18:02:48.488: IPSEC(validate_proposal_request): proposal part #1,
  (key eng. msg.) INBOUND local= 172.16.10.1:0, remote= 172.16.10.2:0,
    local_proxy= 192.168.1.0/255.255.255.0/256/0,
    remote_proxy= 192.168.2.0/255.255.255.0/256/0,
    protocol= ESP, transform= NONE  (Tunnel),
    lifedur= 0s and 0kb,
    spi= 0x0(0), conn_id= 0, keysize= 128, flags= 0x0
*May 24 18:02:48.488: Crypto mapdb : proxy_match
        src addr     : 192.168.1.0
        dst addr     : 192.168.2.0
        protocol     : 0
        src port     : 0
        dst port     : 0
*May 24 18:02:48.488: ISAKMP:(1003): processing NONCE payload. message ID = 2605730229
*May 24 18:02:48.488: ISAKMP:(1003): processing ID payload. message ID = 2605730229
*May 24 18:02:48.488: ISAKMP:(1003): processing ID payload. message ID = 2605730229
*May 24 18:02:48.488: ISAKMP:(1003):Node 2605730229, Input = IKE_MESG_FROM_PEER,
IKE_QM_EXCH
*May 24 18:02:48.488: ISAKMP:(1003):Old State = IKE_QM_I_QM1  New State =
IKE_QM_IPSEC_INSTALL_AWAIT
*May 24 18:02:48.488: IPSEC(key_engine): got a queue event with 1 KMI message(s)
*May 24 18:02:48.488: Crypto mapdb : proxy_match
        src addr     : 192.168.1.0
        dst addr     : 192.168.2.0
        protocol     : 256
        src port     : 0
        dst port     : 0
*May 24 18:02:48.488: IPSEC(crypto_ipsec_create_ipsec_sas): Map found cmap
*May 24 18:02:48.489: IPSEC(crypto_ipsec_sa_find_ident_head): reconnecting with the
same proxies and peer 172.16.10.2
*May 24 18:02:48.489: IPSEC(create_sa): sa created,
  (sa) sa_dest= 172.16.10.1, sa_proto= 50,
    sa_spi= 0x4C0D0EF0(1275924208),
    sa_trans= esp-aes esp-sha-hmac , sa_conn_id= 7
    sa_lifetime(k/sec)= (4608000/3600)
*May 24 18:02:48.489: IPSEC(create_sa): sa created,
  (sa) sa_dest= 172.16.10.2, sa_proto= 50,
    sa_spi= 0xC72072C6(3340792518),
    sa_trans= esp-aes esp-sha-hmac , sa_conn_id= 8
    sa_lifetime(k/sec)= (4608000/3600)

 両方のフェーズで、Internet Security Association and Key Management Protocol(ISAKMP)と IPsec が起動します。

Cisco IOS: IPsec カウンタを確認

R1#show crypto session detail 
Crypto session current status

Code: C - IKE Configuration mode, D - Dead Peer Detection     
K - Keepalives, N - NAT-traversal, T - cTCP encapsulation     
X - IKE Extended Authentication, F - IKE Fragmentation

Interface: Ethernet0/0
Uptime: 00:00:05
Session status: UP-ACTIVE     
Peer: 172.16.10.2 port 500 fvrf: (none) ivrf: (none)
      Phase1_id: 172.16.10.2
      Desc: (none)
  IKEv1 SA: local 172.16.10.1/500 remote 172.16.10.2/500 Active
          Capabilities:(none) connid:1003 lifetime:23:59:54
  IPSEC FLOW: permit ip 192.168.1.0/255.255.255.0 192.168.2.0/255.255.255.0
        Active SAs: 2, origin: crypto map
        Inbound:  #pkts dec'ed 0 drop 0 life (KB/Sec) 4164218/3594
        Outbound: #pkts enc'ed 0 drop 0 life (KB/Sec) 4164218/3594A


100 個のパケットの送信後:

R1#ping 192.168.2.1 source e0/1 repeat 100
Type escape sequence to abort.
Sending 100, 100-byte ICMP Echos to 192.168.2.1, timeout is 2 seconds:
Packet sent with a source address of 192.168.1.1
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Success rate is 100 percent (100/100), round-trip min/avg/max = 4/4/5 ms
R1#

R1#show crypto session detail              
Crypto session current status

Code: C - IKE Configuration mode, D - Dead Peer Detection     
K - Keepalives, N - NAT-traversal, T - cTCP encapsulation     
X - IKE Extended Authentication, F - IKE Fragmentation

Interface: Ethernet0/0
Uptime: 00:00:09
Session status: UP-ACTIVE     
Peer: 172.16.10.2 port 500 fvrf: (none) ivrf: (none)
      Phase1_id: 172.16.10.2
      Desc: (none)
  IKEv1 SA: local 172.16.10.1/500 remote 172.16.10.2/500 Active
          Capabilities:(none) connid:1003 lifetime:23:59:50
  IPSEC FLOW: permit ip 192.168.1.0/255.255.255.0 192.168.2.0/255.255.255.0
        Active SAs: 2, origin: crypto map
        Inbound:  #pkts dec'ed 100 drop 0 life (KB/Sec) 4164202/3590
        Outbound: #pkts enc'ed 100 drop 0 life (KB/Sec) 4164202/3590

Cisco IOS: IKEv1 と IPsec パラメータを確認

R1#show crypto isakmp sa detail 
Codes: C - IKE configuration mode, D - Dead Peer Detection
       K - Keepalives, N - NAT-traversal
       T - cTCP encapsulation, X - IKE Extended Authentication
       psk - Preshared key, rsig - RSA signature
       renc - RSA encryption
IPv4 Crypto ISAKMP SA

C-id  Local           Remote          I-VRF  Status Encr Hash   Auth DH Lifetime Cap.

1003  172.16.10.1     172.16.10.2            ACTIVE aes  sha    psk  5  23:59:35     
       Engine-id:Conn-id =  SW:3


R1#show crypto ipsec sa
interface: Ethernet0/0
    Crypto map tag: cmap, local addr 172.16.10.1

   protected vrf: (none)
   local  ident (addr/mask/prot/port): (192.168.1.0/255.255.255.0/0/0)
   remote ident (addr/mask/prot/port): (192.168.2.0/255.255.255.0/0/0)
   current_peer 172.16.10.2 port 500
     PERMIT, flags={origin_is_acl,}
    #pkts encaps: 100, #pkts encrypt: 100, #pkts digest: 100
    #pkts decaps: 100, #pkts decrypt: 100, #pkts verify: 100
    #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.: 172.16.10.1, remote crypto endpt.: 172.16.10.2
     plaintext mtu 1438, path mtu 1500, ip mtu 1500, ip mtu idb Ethernet0/0
     current outbound spi: 0xC72072C6(3340792518)
     PFS (Y/N): N, DH group: none

     inbound esp sas:
      spi: 0x4C0D0EF0(1275924208)
        transform: esp-aes esp-sha-hmac ,
        in use settings ={Tunnel, }
        conn id: 7, flow_id: SW:7, sibling_flags 80000040, crypto map: cmap
        sa timing: remaining key lifetime (k/sec): (4164202/3562)
        IV size: 16 bytes
        replay detection support: Y
        Status: ACTIVE(ACTIVE)

     inbound ah sas:

     inbound pcp sas:

     outbound esp sas:
      spi: 0xC72072C6(3340792518)
        transform: esp-aes esp-sha-hmac ,
        in use settings ={Tunnel, }
        conn id: 8, flow_id: SW:8, sibling_flags 80000040, crypto map: cmap
        sa timing: remaining key lifetime (k/sec): (4164202/3562)
        IV size: 16 bytes
        replay detection support: Y
        Status: ACTIVE(ACTIVE)

     outbound ah sas:
          
     outbound pcp sas:

両方のフェーズが起動します。 IPsec セキュリティ パラメータ インデックス(SPI)がネゴシエートされます。 100 個のパケットが送信された後にカウンタが 100 に増加しました。

strongSwan: トンネルの確立

pluton# /etc/init.d/ipsec start

May 24 20:02:48 localhost charon: 10[NET] received packet: from 172.16.10.1[500]
to 172.16.10.2[500]
(168 bytes)
May 24 20:02:48 localhost charon: 10[ENC] parsed ID_PROT request 0 [ SA V V V V ]
May 24 20:02:48 localhost charon: 10[IKE] received NAT-T (RFC 3947) vendor ID
May 24 20:02:48 localhost charon: 10[IKE] received draft-ietf-ipsec-nat-t-ike-07
vendor ID
May 24 20:02:48 localhost charon: 10[IKE] received draft-ietf-ipsec-nat-t-ike-03
vendor ID
May 24 20:02:48 localhost charon: 10[IKE] received draft-ietf-ipsec-nat-t-ike-02\n
vendor ID
May 24 20:02:48 localhost charon: 10[IKE] 172.16.10.1 is initiating a Main Mode IKE_SA
May 24 20:02:48 localhost charon: 10[IKE] 172.16.10.1 is initiating a Main Mode IKE_SA
May 24 20:02:48 localhost charon: 10[ENC] generating ID_PROT response 0 [ SA V V V ]
May 24 20:02:48 localhost charon: 10[NET] sending packet: from 172.16.10.2[500] to
172.16.10.1[500] (140 bytes)
May 24 20:02:48 localhost charon: 11[NET] received packet: from 172.16.10.1[500] to
172.16.10.2[500] (348 bytes)
May 24 20:02:48 localhost charon: 11[ENC] parsed ID_PROT request 0
[ KE No V V V NAT-D NAT-D ]
May 24 20:02:48 localhost charon: 11[ENC] generating ID_PROT response 0
[ KE No NAT-D NAT-D ]
May 24 20:02:48 localhost charon: 11[NET] sending packet: from 172.16.10.2[500]
to 172.16.10.1[500] (308 bytes)
May 24 20:02:48 localhost charon: 12[NET] received packet: from 172.16.10.1[500]
to 172.16.10.2[500] (108 bytes)
May 24 20:02:48 localhost charon: 12[ENC] parsed ID_PROT request 0
[ ID HASH N(INITIAL_CONTACT) ]
May 24 20:02:48 localhost charon: 12[CFG] looking for pre-shared key peer configs
matching 172.16.10.2...172.16.10.1[172.16.10.1]
May 24 20:02:48 localhost charon: 12[CFG] selected peer config "ciscoios"
May 24 20:02:48 localhost charon: 12[IKE] IKE_SA ciscoios[2] established between
172.16.10.2[172.16.10.2]...172.16.10.1[172.16.10.1]

May 24 20:02:48 localhost charon: 12[IKE] IKE_SA ciscoios[2] established between
172.16.10.2[172.16.10.2]...172.16.10.1[172.16.10.1]

May 24 20:02:48 localhost charon: 12[IKE] scheduling reauthentication in 3289s
May 24 20:02:48 localhost charon: 12[IKE] maximum IKE_SA lifetime 3469s
May 24 20:02:48 localhost charon: 12[ENC] generating ID_PROT response 0 [ ID HASH ]
May 24 20:02:48 localhost charon: 12[NET] sending packet: from 172.16.10.2[500] to
172.16.10.1[500] (76 bytes)
May 24 20:02:48 localhost charon: 14[NET] received packet: from 172.16.10.1[500] to
172.16.10.2[500] (188 bytes)
May 24 20:02:48 localhost charon: 14[ENC] parsed QUICK_MODE request 2605730229
[ HASH SA No ID ID ]
May 24 20:02:48 localhost charon: 14[IKE] received 3600s lifetime, configured 1200s
May 24 20:02:48 localhost charon: 14[IKE] received 4608000000 lifebytes, configured 0
May 24 20:02:48 localhost charon: 14[ENC] generating QUICK_MODE response 2605730229
[ HASH SA No ID ID ]
May 24 20:02:48 localhost charon: 14[NET] sending packet: from 172.16.10.2[500] to
172.16.10.1[500] (188 bytes)
May 24 20:02:48 localhost charon: 15[NET] received packet: from 172.16.10.1[500] to
172.16.10.2[500] (60 bytes)
May 24 20:02:48 localhost charon: 15[ENC] parsed QUICK_MODE request 2605730229 [ HASH ]
May 24 20:02:48 localhost charon: 15[IKE] CHILD_SA ciscoios{2} established with SPIs
c72072c6_i 4c0d0ef0_o and TS 192.168.2.0/24 === 192.168.1.0/24

May 24 20:02:48 localhost charon: 15[IKE] CHILD_SA ciscoios{2} established with SPIs
c72072c6_i 4c0d0ef0_o and TS 192.168.2.0/24 === 192.168.1.0/24

May 24 20:02:48 localhost vpn: + 172.16.10.1 192.168.1.0/24 == 172.16.10.1 --
172.16.10.2 == 192.168.2.0/24

両方のフェーズが起動します。 192.168.2.0/24 と 192.168.1.0/24 間のトラフィックを保護する正しい SPI がネゴシエートされます。

strongSwan: IPsec 接続の状態の確認

pluton ~ # ipsec statusall
Status of IKE charon daemon (strongSwan 5.0.4, Linux 3.2.12-gentoo, x86_64):
  uptime: 4 minutes, since May 24 20:02:15 2013
  malloc: sbrk 393216, mmap 0, used 274064, free 119152
  worker threads: 8 of 16 idle, 7/1/0/0 working, job queue: 0/0/0/0, scheduled: 4
  loaded plugins: charon mysql sqlite aes des sha1 sha2 md5 random nonce x509
revocation constraints pubkey pkcs1 pkcs8 pgp dnskey pem openssl gcrypt fips-prf
gmp xcbc cmac hmac attr kernel-netlink resolve socket-default stroke updown
eap-identity eap-sim eap-aka eap-aka-3gpp2 eap-simaka-pseudonym eap-simaka-reauth
eap-md5 eap-gtc eap-mschapv2 eap-radius xauth-generic
Listening IP addresses:
  10.0.0.100
  192.168.10.1
  172.16.10.2
  192.168.2.1
Connections:
    ciscoios:  172.16.10.2...172.16.10.1  IKEv1
    ciscoios:   local:  [172.16.10.2] uses pre-shared key authentication
    ciscoios:   remote: [172.16.10.1] uses pre-shared key authentication
    ciscoios:   child:  192.168.2.0/24 === 192.168.1.0/24 TUNNEL
Security Associations (1 up, 0 connecting):
    ciscoios[2]: ESTABLISHED 4 minutes ago, 172.16.10.2[172.16.10.2]...
172.16.10.1[172.16.10.1]
    ciscoios[2]: IKEv1 SPIs: 278f22e3c3e5f606_i dbb5a27f3e0eccd1_r*,
pre-shared key reauthentication in 50 minutes
    ciscoios[2]: IKE proposal: AES_CBC_128/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_1536
    ciscoios{2}:  INSTALLED, TUNNEL, ESP SPIs: c72072c6_i 4c0d0ef0_o
    ciscoios{2}:  AES_CBC_128/HMAC_SHA1_96, 10000 bytes_i (100 pkts, 255s ago),
10000 bytes_o (100 pkts, 255s ago), rekeying in 11 minutes
    ciscoios{2}:   192.168.2.0/24 === 192.168.1.0/24

 ネゴシエートされた ISAKMP および IPsec パラメータの詳細情報を使用できます。

strongSwan: IPsec ポリシーの確認

pluton ~ # ip -s xfrm policy
src 192.168.1.0/24 dst 192.168.2.0/24 uid 0
        dir fwd action allow index 258 priority 1859 share any flag  (0x00000000)
        lifetime config:
          limit: soft (INF)(bytes), hard (INF)(bytes)
          limit: soft (INF)(packets), hard (INF)(packets)
          expire add: soft 0(sec), hard 0(sec)
          expire use: soft 0(sec), hard 0(sec)
        lifetime current:
          0(bytes), 0(packets)
          add 2013-05-24 20:02:48 use -
        tmpl src 172.16.10.1 dst 172.16.10.2
                proto esp spi 0x00000000(0) reqid 2(0x00000002) mode tunnel
                level required share any
                enc-mask ffffffff auth-mask ffffffff comp-mask ffffffff
src 192.168.1.0/24 dst 192.168.2.0/24 uid 0
        dir in action allow index 248 priority 1859 share any flag  (0x00000000)
        lifetime config:
          limit: soft (INF)(bytes), hard (INF)(bytes)
          limit: soft (INF)(packets), hard (INF)(packets)
          expire add: soft 0(sec), hard 0(sec)
          expire use: soft 0(sec), hard 0(sec)
        lifetime current:
          0(bytes), 0(packets)
          add 2013-05-24 20:02:48 use 2013-05-24 20:02:56
        tmpl src 172.16.10.1 dst 172.16.10.2
                proto esp spi 0x00000000(0) reqid 2(0x00000002) mode tunnel
                level required share any
                enc-mask ffffffff auth-mask ffffffff comp-mask ffffffff
src 192.168.2.0/24 dst 192.168.1.0/24 uid 0
        dir out action allow index 241 priority 1859 share any flag  (0x00000000)
        lifetime config:
          limit: soft (INF)(bytes), hard (INF)(bytes)
          limit: soft (INF)(packets), hard (INF)(packets)
          expire add: soft 0(sec), hard 0(sec)
          expire use: soft 0(sec), hard 0(sec)
        lifetime current:
          0(bytes), 0(packets)
          add 2013-05-24 20:02:48 use 2013-05-24 20:02:56
        tmpl src 172.16.10.2 dst 172.16.10.1
                proto esp spi 0x00000000(0) reqid 2(0x00000002) mode tunnel
                level required share any
                enc-mask ffffffff auth-mask ffffffff comp-mask ffffffff

前述の詳細情報には、内部ポリシー テーブルが含まれています。

Cisco IOS と strongSwan 間での IKEv2

Cisco IOS

R1#ping 192.168.2.1 source e0/1 repeat 1

Cisco IOS によってトリガーされるトンネルの確立

*May 24 19:14:10.485: IPSEC(sa_request): ,
  (key eng. msg.) OUTBOUND local= 172.16.10.1:500, remote= 172.16.10.2:500,
    local_proxy= 192.168.1.0/255.255.255.0/256/0,
    remote_proxy= 192.168.2.0/255.255.255.0/256/0,
    protocol= ESP, transform= esp-aes esp-sha-hmac  (Tunnel),
    lifedur= 3600s and 4608000kb,
    spi= 0x0(0), conn_id= 0, keysize= 128, flags= 0x0
*May 24 19:14:10.486: IKEv2:% Getting preshared key from profile keyring keys
*May 24 19:14:10.486: IKEv2:% Matched peer block 'strongswan'
*May 24 19:14:10.486: IKEv2:Searching Policy with fvrf 0, local address 172.16.10.1
*May 24 19:14:10.486: IKEv2:Found Policy 'ikev2policy'
*May 24 19:14:10.486: IKEv2:(SA ID = 1):[IKEv2 -> Crypto Engine] Computing DH public
key, DH Group 5
*May 24 19:14:10.486: IKEv2:(SA ID = 1):[Crypto Engine -> IKEv2] DH key Computation
PASSED
*May 24 19:14:10.486: IKEv2:(SA ID = 1):Request queued for computation of DH key
*May 24 19:14:10.486: IKEv2:IKEv2 initiator - no config data to send in IKE_SA_INIT exch
*May 24 19:14:10.486: IKEv2:(SA ID = 1):Generating IKE_SA_INIT message
*May 24 19:14:10.486: IKEv2:(SA ID = 1):IKE Proposal: 1, SPI size: 0
(initial negotiation),
Num. transforms: 4
   AES-CBC   SHA1   SHA96   DH_GROUP_1536_MODP/Group 5

*May 24 19:14:10.486: IKEv2:(SA ID = 1):Sending Packet [To 172.16.10.2:500/From
172.16.10.1:500/VRF i0:f0]
Initiator SPI : 9FFC38791FFEF212 - Responder SPI : 0000000000000000 Message id: 0
IKEv2 IKE_SA_INIT Exchange REQUEST
Payload contents:
 SA KE N VID VID NOTIFY(NAT_DETECTION_SOURCE_IP) NOTIFY(NAT_DETECTION_DESTINATION_IP)

*May 24 19:14:10.486: IKEv2:(SA ID = 1):Insert SA

*May 24 19:14:10.495: IKEv2:(SA ID = 1):Received Packet [From 172.16.10.2:500/To
172.16.10.1:500/VRF i0:f0]
Initiator SPI : 9FFC38791FFEF212 - Responder SPI : 6CDC17F5B0B10C1A Message id: 0
IKEv2 IKE_SA_INIT Exchange RESPONSE
Payload contents:
 SA KE N NOTIFY(NAT_DETECTION_SOURCE_IP) NOTIFY(NAT_DETECTION_DESTINATION_IP)
NOTIFY(Unknown - 16404)
          
*May 24 19:14:10.495: IKEv2:(SA ID = 1):Processing IKE_SA_INIT message
*May 24 19:14:10.495: IKEv2:(SA ID = 1):Verify SA init message
*May 24 19:14:10.495: IKEv2:(SA ID = 1):Processing IKE_SA_INIT message
*May 24 19:14:10.495: IKEv2:(SA ID = 1):Checking NAT discovery
*May 24 19:14:10.495: IKEv2:(SA ID = 1):NAT not found
*May 24 19:14:10.495: IKEv2:(SA ID = 1):[IKEv2 -> Crypto Engine] Computing DH
secret key, DH Group 5
*May 24 19:14:10.504: IKEv2:(SA ID = 1):[Crypto Engine -> IKEv2] DH key Computation
PASSED
*May 24 19:14:10.504: IKEv2:(SA ID = 1):Request queued for computation of DH secret
*May 24 19:14:10.504: IKEv2:(SA ID = 1):[IKEv2 -> Crypto Engine] Calculate SKEYSEED
and create rekeyed IKEv2 SA
*May 24 19:14:10.504: IKEv2:(SA ID = 1):[Crypto Engine -> IKEv2] SKEYSEED
calculation and creation of
rekeyed IKEv2 SA PASSED
*May 24 19:14:10.504: IKEv2:(SA ID = 1):Completed SA init exchange
*May 24 19:14:10.504: IKEv2:(SA ID = 1):Check for EAP exchange
*May 24 19:14:10.504: IKEv2:(SA ID = 1):Generate my authentication data
*May 24 19:14:10.504: IKEv2:(SA ID = 1):Use preshared key for id 172.16.10.1,
key len 5
*May 24 19:14:10.504: IKEv2:[IKEv2 -> Crypto Engine] Generate IKEv2 authentication
data
*May 24 19:14:10.504: IKEv2:[Crypto Engine -> IKEv2] IKEv2 authentication data
generation PASSED

*May 24 19:14:10.504: IKEv2:(SA ID = 1):Get my authentication method
*May 24 19:14:10.504: IKEv2:(SA ID = 1):My authentication method is 'PSK'
*May 24 19:14:10.504: IKEv2:(SA ID = 1):Check for EAP exchange
*May 24 19:14:10.504: IKEv2:(SA ID = 1):Generating IKE_AUTH message
*May 24 19:14:10.504: IKEv2:(SA ID = 1):Constructing IDi payload: '172.16.10.1'
of type 'IPv4 address'
*May 24 19:14:10.504: IKEv2:(SA ID = 1):ESP Proposal: 1, SPI size: 4
(IPSec negotiation),
Num. transforms: 3
   AES-CBC   SHA96   Don't use ESN
*May 24 19:14:10.504: IKEv2:(SA ID = 1):Building packet for encryption.  
Payload contents:
 VID IDi AUTH SA TSi TSr NOTIFY(INITIAL_CONTACT) NOTIFY(SET_WINDOW_SIZE)
NOTIFY(ESP_TFC_NO_SUPPORT) NOTIFY(NON_FIRST_FRAGS)

*May 24 19:14:10.505: IKEv2:(SA ID = 1):Sending Packet
[To 172.16.10.2:500/From 172.16.10.1:500/VRF i0:f0]
Initiator SPI : 9FFC38791FFEF212 - Responder SPI : 6CDC17F5B0B10C1A Message id: 1
IKEv2 IKE_AUTH Exchange REQUEST
Payload contents:
 ENCR     
 

*May 24 19:14:10.522: IKEv2:(SA ID = 1):Received Packet
[From 172.16.10.2:500/To 172.16.10.1:500/VRF i0:f0]
Initiator SPI : 9FFC38791FFEF212 - Responder SPI : 6CDC17F5B0B10C1A Message id: 1
IKEv2 IKE_AUTH Exchange RESPONSE
Payload contents:
 IDr AUTH SA TSi TSr NOTIFY(Unknown - 16403)

*May 24 19:14:10.522: IKEv2:(SA ID = 1):Process auth response notify
*May 24 19:14:10.522: IKEv2:(SA ID = 1):Searching policy based on peer's
identity '172.16.10.2' of type 'IPv4 address'
*May 24 19:14:10.522: IKEv2:Searching Policy with fvrf 0, local address 172.16.10.1
*May 24 19:14:10.522: IKEv2:Found Policy 'ikev2policy'
*May 24 19:14:10.522: IKEv2:(SA ID = 1):Verify peer's policy
*May 24 19:14:10.522: IKEv2:(SA ID = 1):Peer's policy verified
*May 24 19:14:10.522: IKEv2:(SA ID = 1):Get peer's authentication method
*May 24 19:14:10.522: IKEv2:(SA ID = 1):Peer's authentication method is 'PSK'
*May 24 19:14:10.522: IKEv2:(SA ID = 1):Get peer's preshared key for 172.16.10.2
*May 24 19:14:10.522: IKEv2:(SA ID = 1):Verify peer's authentication data
*May 24 19:14:10.522: IKEv2:(SA ID = 1):Use preshared key for id 172.16.10.2, key len 5
*May 24 19:14:10.522: IKEv2:[IKEv2 -> Crypto Engine] Generate IKEv2 authentication data
*May 24 19:14:10.522: IKEv2:[Crypto Engine -> IKEv2] IKEv2 authentication data
generation PASSED

*May 24 19:14:10.522: IKEv2:(SA ID = 1):Verification of peer's authenctication data
PASSED

*May 24 19:14:10.522: IKEv2:(SA ID = 1):Check for EAP exchange
*May 24 19:14:10.522: IKEv2:(SA ID = 1):Processing IKE_AUTH message
*May 24 19:14:10.522: IKEv2:KMI/verify policy/sending to IPSec:
         prot: 3 txfm: 12 hmac 2 flags 8177 keysize 128 IDB 0x0
*May 24 19:14:10.522: IPSEC(validate_proposal_request): proposal part #1
*May 24 19:14:10.522: IPSEC(validate_proposal_request): proposal part #1,
  (key eng. msg.) INBOUND local= 172.16.10.1:0, remote= 172.16.10.2:0,
    local_proxy= 192.168.1.0/255.255.255.0/256/0,
    remote_proxy= 192.168.2.0/255.255.255.0/256/0,
    protocol= ESP, transform= NONE  (Tunnel),
    lifedur= 0s and 0kb,
    spi= 0x0(0), conn_id= 0, keysize= 128, flags= 0x0
*May 24 19:14:10.522: Crypto mapdb : proxy_match
        src addr     : 192.168.1.0
        dst addr     : 192.168.2.0
        protocol     : 0
        src port     : 0
        dst port     : 0
*May 24 19:14:10.522: IKEv2:(SA ID = 1):IKEV2 SA created; inserting SA into database.
SA lifetime timer (86400 sec) started
*May 24 19:14:10.522: IKEv2:(SA ID = 1):Session with IKE ID PAIR
(172.16.10.2, 172.16.10.1) is UP
*May 24 19:14:10.522: IKEv2:IKEv2 MIB tunnel started, tunnel index 1
*May 24 19:14:10.522: IKEv2:(SA ID = 1):Load IPSEC key material
*May 24 19:14:10.522: IKEv2:(SA ID = 1):[IKEv2 -> IPsec] Create IPsec SA into
IPsec database
*May 24 19:14:10.522: IKEv2:(SA ID = 1):Asynchronous request queued

*May 24 19:14:10.522: IKEv2:(SA ID = 1):
*May 24 19:14:10.523: IPSEC(key_engine): got a queue event with 1 KMI message(s)
*May 24 19:14:10.523: Crypto mapdb : proxy_match
        src addr     : 192.168.1.0
       dst addr     : 192.168.2.0
        protocol     : 256
        src port     : 0
        dst port     : 0
*May 24 19:14:10.523: IPSEC(crypto_ipsec_create_ipsec_sas): Map found cmap
*May 24 19:14:10.523: IPSEC(crypto_ipsec_sa_find_ident_head): reconnecting with
the same proxies and peer 172.16.10.2
*May 24 19:14:10.523: IPSEC(create_sa): sa created,
  (sa) sa_dest= 172.16.10.1, sa_proto= 50,
    sa_spi= 0xDF405365(3745534821),
    sa_trans= esp-aes esp-sha-hmac , sa_conn_id= 6
    sa_lifetime(k/sec)= (4608000/3600)
*May 24 19:14:10.523: IPSEC(create_sa): sa created,
  (sa) sa_dest= 172.16.10.2, sa_proto= 50,
    sa_spi= 0xC0CC116C(3234599276),
    sa_trans= esp-aes esp-sha-hmac , sa_conn_id= 5
    sa_lifetime(k/sec)= (4608000/3600)
*May 24 19:14:10.523: IPSEC: Expand action denied, notify RP
*May 24 19:14:10.523: IKEv2:(SA ID = 1):[IPsec -> IKEv2] Creation of IPsec
SA into IPsec database PASSED

IKEv2 セッションが起動し、192.168.1.0/24 と 192.168.2.0/24 間のトラフィックを保護する IPsec SA が作成されています。

Cisco IOS: IPsec カウンタを確認

R1#show crypto session detail 
Crypto session current status

Code: C - IKE Configuration mode, D - Dead Peer Detection     
K - Keepalives, N - NAT-traversal, T - cTCP encapsulation     
X - IKE Extended Authentication, F - IKE Fragmentation

Interface: Ethernet0/0
Uptime: 00:00:09
Session status: UP-ACTIVE     
Peer: 172.16.10.2 port 500 fvrf: (none) ivrf: (none)
      Phase1_id: 172.16.10.2
      Desc: (none)
  IKEv2 SA: local 172.16.10.1/500 remote 172.16.10.2/500 Active
          Capabilities:(none) connid:1 lifetime:23:59:51
  IPSEC FLOW: permit ip 192.168.1.0/255.255.255.0 192.168.2.0/255.255.255.0
        Active SAs: 2, origin: crypto map
        Inbound:  #pkts dec'ed 0 drop 0 life (KB/Sec) 4375820/3590
        Outbound: #pkts enc'ed 0 drop 0 life (KB/Sec) 4375820/3590


100 個のパケットの送信後:

R1#ping 192.168.2.1 source 192.168.1.1 repeat 100
Type escape sequence to abort.
Sending 100, 100-byte ICMP Echos to 192.168.2.1, timeout is 2 seconds:
Packet sent with a source address of 192.168.1.1
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Success rate is 100 percent (100/100), round-trip min/avg/max = 1/4/5 ms
R1#


R1#show crypto session detail                      
Crypto session current status

Code: C - IKE Configuration mode, D - Dead Peer Detection     
K - Keepalives, N - NAT-traversal, T - cTCP encapsulation     
X - IKE Extended Authentication, F - IKE Fragmentation

Interface: Ethernet0/0
Uptime: 00:00:15
Session status: UP-ACTIVE     
Peer: 172.16.10.2 port 500 fvrf: (none) ivrf: (none)
      Phase1_id: 172.16.10.2
      Desc: (none)
  IKEv2 SA: local 172.16.10.1/500 remote 172.16.10.2/500 Active
          Capabilities:(none) connid:1 lifetime:23:59:45
  IPSEC FLOW: permit ip 192.168.1.0/255.255.255.0 192.168.2.0/255.255.255.0
        Active SAs: 2, origin: crypto map
        Inbound:  #pkts dec'ed 100 drop 0 life (KB/Sec) 4375803/3585
        Outbound: #pkts enc'ed 100 drop 0 life (KB/Sec) 4375803/3585

カウンタが 100 増加しています。

Cisco IOS: IKEv2 および IPSec パラメータの確認

Cisco IOS には IKEv2 セッションのための非常に優れた統計情報および詳細情報があります。

R1#show crypto ikev2 sa detailed 
 IPv4 Crypto IKEv2  SA

Tunnel-id Local                 Remote                fvrf/ivrf            Status
1         172.16.10.1/500       172.16.10.2/500       none/none            READY  
      Encr: AES-CBC, keysize: 128, Hash: SHA96, DH Grp:5, Auth sign: PSK, Auth verify: PSK
      Life/Active Time: 86400/152 sec
      CE id: 1019, Session-id: 3
      Status Description: Negotiation done
      Local spi: 9FFC38791FFEF212       Remote spi: 6CDC17F5B0B10C1A
      Local id: 172.16.10.1
      Remote id: 172.16.10.2
      Local req msg id:  2              Remote req msg id:  0         
      Local next msg id: 2              Remote next msg id: 0         
      Local req queued:  2              Remote req queued:  0         
      Local window:      5              Remote window:      1         
      DPD configured for 0 seconds, retry 0
      Fragmentation not configured.
      Extended Authentication not configured.
      NAT-T is not detected  
      Cisco Trust Security SGT is disabled
      Initiator of SA : Yes

 IPv6 Crypto IKEv2  SA


R1#show crypto ipsec sa

interface: Ethernet0/0
    Crypto map tag: cmap, local addr 172.16.10.1

   protected vrf: (none)
   local  ident (addr/mask/prot/port): (192.168.1.0/255.255.255.0/0/0)
   remote ident (addr/mask/prot/port): (192.168.2.0/255.255.255.0/0/0)
   current_peer 172.16.10.2 port 500
     PERMIT, flags={origin_is_acl,}
    #pkts encaps: 100, #pkts encrypt: 100, #pkts digest: 100
    #pkts decaps: 100, #pkts decrypt: 100, #pkts verify: 100
    #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.: 172.16.10.1, remote crypto endpt.: 172.16.10.2
     plaintext mtu 1438, path mtu 1500, ip mtu 1500, ip mtu idb Ethernet0/0
     current outbound spi: 0xC0CC116C(3234599276)
     PFS (Y/N): N, DH group: none

     inbound esp sas:
      spi: 0xDF405365(3745534821)
        transform: esp-aes esp-sha-hmac ,
        in use settings ={Tunnel, }
        conn id: 6, flow_id: SW:6, sibling_flags 80000040, crypto map: cmap
        sa timing: remaining key lifetime (k/sec): (4375803/3442)
        IV size: 16 bytes
        replay detection support: Y
        Status: ACTIVE(ACTIVE)

     inbound ah sas:

     inbound pcp sas:

     outbound esp sas:
      spi: 0xC0CC116C(3234599276)
        transform: esp-aes esp-sha-hmac ,
        in use settings ={Tunnel, }
        conn id: 5, flow_id: SW:5, sibling_flags 80000040, crypto map: cmap
        sa timing: remaining key lifetime (k/sec): (4375803/3442)
        IV size: 16 bytes
        replay detection support: Y
        Status: ACTIVE(ACTIVE)

     outbound ah sas:
          
     outbound pcp sas:    

strongSwan: トンネルの確立

May 24 21:14:10 localhost charon: 08[NET] received packet: from 172.16.10.1[500] 
to 172.16.10.2[500]
(400 bytes)
May 24 21:14:10 localhost charon: 08[ENC] parsed IKE_SA_INIT request 0
[ SA KE No V V N(NATD_S_IP) N(NATD_D_IP) ]
May 24 21:14:10 localhost charon: 08[ENC] received unknown vendor
ID: 43:49:53:43:4f:2d:44:45:4c:45:54:45:2d:52:45:41:53:4f:4e
May 24 21:14:10 localhost charon: 08[ENC] received unknown vendor ID:
46:4c:45:58:56:50:4e:2d:53:55:50:50:4f:52:54:45:44
May 24 21:14:10 localhost charon: 08[IKE] 172.16.10.1 is initiating an IKE_SA
May 24 21:14:10 localhost charon: 08[IKE] 172.16.10.1 is initiating an IKE_SA
May 24 21:14:10 localhost charon: 08[ENC] generating IKE_SA_INIT response 0
[ SA KE No N(NATD_S_IP) N(NATD_D_IP) N(MULT_AUTH) ]
May 24 21:14:10 localhost charon: 08[NET] sending packet: from 172.16.10.2[500]
to 172.16.10.1[500] (376 bytes)
May 24 21:14:10 localhost charon: 07[NET] received packet: from 172.16.10.1[500]
to 172.16.10.2[500] (284 bytes)
May 24 21:14:10 localhost charon: 07[ENC] parsed IKE_AUTH request 1 [ V IDi AUTH
SA TSi TSr N(INIT_CONTACT) N(SET_WINSIZE) N(ESP_TFC_PAD_N) N(NON_FIRST_FRAG) ]
May 24 21:14:10 localhost charon: 07[CFG] looking for peer configs matching
172.16.10.2[%any]...172.16.10.1[172.16.10.1]
May 24 21:14:10 localhost charon: 07[CFG] selected peer config 'ciscoios'
May 24 21:14:10 localhost charon: 07[IKE] authentication of '172.16.10.1' with
pre-shared key successful

May 24 21:14:10 localhost charon: 07[IKE] received ESP_TFC_PADDING_NOT_SUPPORTED,
not using ESPv3 TFC padding
May 24 21:14:10 localhost charon: 07[IKE] authentication of '172.16.10.2' (myself)
with pre-shared key

May 24 21:14:10 localhost charon: 07[IKE] IKE_SA ciscoios[2] established between
172.16.10.2[172.16.10.2]...172.16.10.1[172.16.10.1]

May 24 21:14:10 localhost charon: 07[IKE] IKE_SA ciscoios[2] established between
172.16.10.2[172.16.10.2]...172.16.10.1[172.16.10.1]

May 24 21:14:10 localhost charon: 07[IKE] scheduling reauthentication in 3247s
May 24 21:14:10 localhost charon: 07[IKE] maximum IKE_SA lifetime 3427s
May 24 21:14:10 localhost charon: 07[IKE] CHILD_SA ciscoios{2} established with
SPIs c0cc116c_i df405365_o and TS 192.168.2.0/24 === 192.168.1.0/24
May 24 21:14:10 localhost charon: 07[IKE] CHILD_SA ciscoios{2} established with
SPIs c0cc116c_i df405365_o and TS 192.168.2.0/24 === 192.168.1.0/24
May 24 21:14:10 localhost vpn: + 172.16.10.1 192.168.1.0/24 == 172.16.10.1 --
172.16.10.2 == 192.168.2.0/24

トンネルの確立の詳細は、IKEv1 と少し似ています。

strongSwan: IPsec 接続の状態の確認

pluton ~ # ipsec statusall
Status of IKE charon daemon (strongSwan 5.0.4, Linux 3.2.12-gentoo, x86_64):
  uptime: 2 minutes, since May 24 21:13:27 2013
  malloc: sbrk 393216, mmap 0, used 274864, free 118352
  worker threads: 8 of 16 idle, 7/1/0/0 working, job queue: 0/0/0/0, scheduled: 4
  loaded plugins: charon mysql sqlite aes des sha1 sha2 md5 random nonce x509
revocation constraints pubkey pkcs1 pkcs8 pgp dnskey pem openssl gcrypt
fips-prf gmp xcbc cmac hmac attr kernel-netlink resolve socket-default
stroke updown eap-identity eap-sim eap-aka eap-aka-3gpp2 eap-simaka-pseudonym
eap-simaka-reauth eap-md5 eap-gtc eap-mschapv2 eap-radius xauth-generic
Listening IP addresses:
  10.0.0.100
  192.168.10.1
  192.168.2.1
  172.16.10.2
Connections:
    ciscoios:  172.16.10.2...172.16.10.1  IKEv2
    ciscoios:   local:  [172.16.10.2] uses pre-shared key authentication
    ciscoios:   remote: [172.16.10.1] uses pre-shared key authentication
    ciscoios:   child:  192.168.2.0/24 === 192.168.1.0/24 TUNNEL
Security Associations (1 up, 0 connecting):
    ciscoios[2]: ESTABLISHED 116 seconds ago, 172.16.10.2[172.16.10.2]...
172.16.10.1[172.16.10.1]
    ciscoios[2]: IKEv2 SPIs: 12f2fe1f7938fc9f_i 1a0cb1b0f517dc6c_r*,
pre-shared key reauthentication in 52 minutes
    ciscoios[2]: IKE proposal: AES_CBC_128/HMAC_SHA1_96/PRF_HMAC_SHA1/MODP_1536
    ciscoios{2}:  INSTALLED, TUNNEL, ESP SPIs: c0cc116c_i df405365_o
    ciscoios{2}:  AES_CBC_128/HMAC_SHA1_96, 10000 bytes_i (100 pkts, 102s ago),
10000 bytes_o (100 pkts, 102s ago), rekeying in 12 minutes
    ciscoios{2}:   192.168.2.0/24 === 192.168.1.0/24

strongSwan: IPsec ポリシーの確認

pluton ~ # ip -s xfrm policy
src 192.168.1.0/24 dst 192.168.2.0/24 uid 0
        dir fwd action allow index 1154 priority 1859 share any flag  (0x00000000)
        lifetime config:
          limit: soft (INF)(bytes), hard (INF)(bytes)
          limit: soft (INF)(packets), hard (INF)(packets)
          expire add: soft 0(sec), hard 0(sec)
          expire use: soft 0(sec), hard 0(sec)
        lifetime current:
          0(bytes), 0(packets)
          add 2013-05-24 21:14:10 use -
        tmpl src 172.16.10.1 dst 172.16.10.2
                proto esp spi 0x00000000(0) reqid 2(0x00000002) mode tunnel
                level required share any
                enc-mask ffffffff auth-mask ffffffff comp-mask ffffffff
src 192.168.1.0/24 dst 192.168.2.0/24 uid 0
        dir in action allow index 1144 priority 1859 share any flag  (0x00000000)
        lifetime config:
          limit: soft (INF)(bytes), hard (INF)(bytes)
          limit: soft (INF)(packets), hard (INF)(packets)
          expire add: soft 0(sec), hard 0(sec)
          expire use: soft 0(sec), hard 0(sec)
        lifetime current:
          0(bytes), 0(packets)
          add 2013-05-24 21:14:10 use 2013-05-24 21:14:23
        tmpl src 172.16.10.1 dst 172.16.10.2
                proto esp spi 0x00000000(0) reqid 2(0x00000002) mode tunnel
                level required share any
                enc-mask ffffffff auth-mask ffffffff comp-mask ffffffff
src 192.168.2.0/24 dst 192.168.1.0/24 uid 0
        dir out action allow index 1137 priority 1859 share any flag  (0x00000000)
        lifetime config:
          limit: soft (INF)(bytes), hard (INF)(bytes)
          limit: soft (INF)(packets), hard (INF)(packets)
          expire add: soft 0(sec), hard 0(sec)
          expire use: soft 0(sec), hard 0(sec)
        lifetime current:
          0(bytes), 0(packets)
          add 2013-05-24 21:14:10 use 2013-05-24 21:14:23
        tmpl src 172.16.10.2 dst 172.16.10.1
                proto esp spi 0x00000000(0) reqid 2(0x00000002) mode tunnel
                level required share any
                enc-mask ffffffff auth-mask ffffffff comp-mask ffffffff

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Document ID: 117258