在使用扩展身份验证的网络扩展模式下将 PIX 501/506 Easy VPN 远程客户端配置为 IOS 路由器

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已更新: 2008 年 9 月 26 日

文档 ID:23783

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简介

本文说明了，Cisco IOS®软件的最新版本中可用的Easy VPN服务器功能和PIX Easy VPN远程硬件客户端功能之间的IPSec配置。PIX的Easy VPN Remote功能被引入PIX版本6.2，也请参见硬件客户端/EzVPN客户端。当Easy VPN Remote连接到头端设备时，至少有五个安全关联(SA)，包括一个互联网密钥交换(IKE)和四个IPSec关联。当Easy VPN Remote连接到头端时，它始终会将两个IPSec SA与PIX外部接口的IP地址协商到VPN服务器后面的任何地址。这可用于管理目的，从 Cisco IOS 路由器后面的网络（通过Secure Shell [SSH]、用于 PIX 设备管理器 [PDM] 的安全 HTTP 或 Telnet）连接到 PIX 的外部接口。默认情况下，SA是在不进行任何配置的情况下创建的，另外两个SA是为PIX后的网络和Cisco IOS路由器之间的数据流量创建的。

有关 PIX 506 6.x 充当 Easy VPN Server 的类似方案的详细信息，请参阅 PIX 到 PIX 6.x：Easy VPN (NEM) 配置示例。

有关 PIX/ASA 7.x 充当 Easy VPN 服务器的类似情况的详细信息，请参阅 ASA 5500 作为服务器和 PIX 506E 作为客户端 (NEM) 情况下 PIX/ASA 7.x Easy VPN 的配置示例。

有关将 Cisco 871 路由器用作 Easy VPN Remote 的类似方案的详细信息，请参阅将 ASA 5500 用作服务器，将 Cisco 871 用作 Easy VPN Remote 的 PIX/ASA 7.x Easy VPN 配置示例。

有关 Cisco VPN 3000 集中器充当 Easy VPN Server 的类似方案的详细信息，请参阅使用 VPN 3000 集中器配置 PIX 501/506 系列安全设备上的 VPN 硬件客户端的示例。

先决条件

要求

本文档没有任何特定的要求。

使用的组件

本文档中的信息基于以下软件和硬件版本：

运行 6.3(5) 版软件的 PIX 防火墙

注意：PIX上的Easy VPN客户端功能在版本6.2中引入。
运行 12.4(4)T1 版软件的 Cisco 7200 系列 IOS 路由器

注意：Easy VPN服务器功能在版本12.2(8)T中引入。

本文档中的信息都是基于特定实验室环境中的设备编写的。本文档中使用的所有设备最初均采用原始（默认）配置。如果您使用的是真实网络，请确保您已经了解所有命令的潜在影响。

规则

有关文档规则的详细信息，请参阅 Cisco 技术提示规则。

配置

本部分提供有关如何配置本文档所述功能的信息。

注意：使用命令查找工具(仅限注册客户)可查找有关本文档中使用的命令的详细信息。

网络图

本文档使用以下网络设置：

配置

本文档使用以下配置：

Cisco IOS 路由器
PIX

Cisco IOS 路由器
ezvpn_server#show running-config Building configuration... Current configuration : 1894 bytes ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname ezvpn_server ! boot-start-marker boot system disk1:c7200-adventerprisek9-mz.124-4.T1.bin boot-end-marker ! ! !--- Enable the authentication, authorization, and accounting (AAA) !--- access control model. aaa new-model ! ! !--- Enable X-Auth for user authentication. aaa authentication login userauthen local !--- Enable group authorization. aaa authorization network groupauthor local ! aaa session-id common ! resource policy ! ip subnet-zero ip cef ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !--- For local authentication of the IPSec user, !--- create the user with password. username remoteuser1 password 0 remotepass username cisco password 0 cisco ! ! ! !--- Create an Internet Security Association and Key Management Protocol !--- (ISAKMP) policy for Phase 1 negotiations for the hardware client. crypto isakmp policy 10 hash md5 authentication pre-share group 2 ! !--- Create a group that will be used to specify the !--- Windows Internet Name Service (WINS) and Domain Name System (DNS) !--- servers' addresses to the hardware client for authentication. crypto isakmp client configuration group hwclient key test123 dns 172.22.1.101 wins 172.22.1.102 domain cisco.com pool ippool ! ! !--- Create the Phase 2 Policy for actual data encryption. crypto ipsec transform-set myset esp-des esp-md5-hmac ! !--- Create a dynamic map and apply the transform set that was created above. crypto dynamic-map dynmap 10 set transform-set myset ! ! !--- Create the actual crypto map, and apply !--- the aaa lists that were created earlier. crypto map clientmap client authentication list userauthen crypto map clientmap isakmp authorization list groupauthor crypto map clientmap client configuration address respond crypto map clientmap 10 ipsec-isakmp dynamic dynmap ! ! ! ! ! interface FastEthernet0/0 ip address 10.10.10.2 255.255.255.0 duplex half !--- Apply the crypto map on the outside interface. crypto map clientmap ! interface ATM2/0 no ip address shutdown no atm ilmi-keepalive ! interface FastEthernet4/0 no ip address shutdown duplex half ! interface Ethernet5/0 ip address 172.22.1.1 255.255.255.0 duplex half ! interface Ethernet5/1 no ip address shutdown duplex half ! interface Ethernet5/2 no ip address shutdown duplex half ! interface Ethernet5/3 no ip address shutdown duplex half ! !--- Create a pool of addresses to be assigned to the VPN Clients. ip local pool ippool 172.22.1.50 172.22.1.70 ip classless no ip http server no ip http secure-server ! ! ! logging alarm informational ! ! ! ! control-plane ! ! ! ! ! ! gatekeeper shutdown ! ! line con 0 stopbits 1 line aux 0 stopbits 1 line vty 0 4 ! ! end ezvpn_server#

Cisco IOS 路由器

ezvpn_server#show running-config
Building configuration...

Current configuration : 1894 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname ezvpn_server
!
boot-start-marker
boot system disk1:c7200-adventerprisek9-mz.124-4.T1.bin
boot-end-marker
!
!

!--- Enable the authentication, authorization, and accounting (AAA) !--- access control model.

aaa new-model
!
!

!--- Enable X-Auth for user authentication.

aaa authentication login userauthen local

!--- Enable group authorization.

aaa authorization network groupauthor local
!
aaa session-id common
!
resource policy
!
ip subnet-zero
ip cef
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!

!--- For local authentication of the IPSec user, !--- create the user with password.

username remoteuser1 password 0 remotepass
username cisco password 0 cisco
!
!
!

!--- Create an Internet Security Association and Key Management Protocol !--- (ISAKMP) policy for Phase 1 negotiations for the hardware client.

crypto isakmp policy 10
 hash md5
 authentication pre-share
 group 2
!

!--- Create a group that will be used to specify the !--- Windows Internet Name Service (WINS) and Domain Name System (DNS) !--- servers' addresses to the hardware client for authentication.

crypto isakmp client configuration group hwclient
 key test123
 dns 172.22.1.101
 wins 172.22.1.102
 domain cisco.com
 pool ippool
!
!

!--- Create the Phase 2 Policy for actual data encryption.

crypto ipsec transform-set myset esp-des esp-md5-hmac
!

!--- Create a dynamic map and apply the transform set that was created above.

crypto dynamic-map dynmap 10
 set transform-set myset
!
!

!--- Create the actual crypto map, and apply !--- the aaa lists that were created earlier.

crypto map clientmap client authentication list userauthen
crypto map clientmap isakmp authorization list groupauthor
crypto map clientmap client configuration address respond
crypto map clientmap 10 ipsec-isakmp dynamic dynmap
!
!
!
!
!
interface FastEthernet0/0
 ip address 10.10.10.2 255.255.255.0
 duplex half

!--- Apply the crypto map on the outside interface.

 crypto map clientmap
!
interface ATM2/0
 no ip address
 shutdown
 no atm ilmi-keepalive
!
interface FastEthernet4/0
 no ip address
 shutdown
 duplex half
!
interface Ethernet5/0
 ip address 172.22.1.1 255.255.255.0
 duplex half
!
interface Ethernet5/1
 no ip address
 shutdown
 duplex half
!
interface Ethernet5/2
 no ip address
 shutdown
 duplex half
!
interface Ethernet5/3
 no ip address
 shutdown
 duplex half
!

!--- Create a pool of addresses to be assigned to the VPN Clients.

ip local pool ippool 172.22.1.50 172.22.1.70
ip classless
no ip http server
no ip http secure-server
!
!
!
logging alarm informational
!
!
!
!
control-plane
!
!
!
!
!
!
gatekeeper
 shutdown
!
!
line con 0
 stopbits 1
line aux 0
 stopbits 1
line vty 0 4
!
!
end


ezvpn_server#

PIX
pix506#show running-config : Saved : PIX Version 6.3(5) !--- Specify speed and duplex settings. interface ethernet0 auto interface ethernet1 auto nameif ethernet0 outside security0 nameif ethernet1 inside security100 enable password WwXYvtKrnjXqGbu1 encrypted passwd 2KFQnbNIdI.2KYOU encrypted hostname pix506 domain-name cisco.com fixup protocol dns maximum-length 512 fixup protocol ftp 21 fixup protocol h323 h225 1720 fixup protocol h323 ras 1718-1719 fixup protocol http 80 fixup protocol rsh 514 fixup protocol rtsp 554 fixup protocol sip 5060 fixup protocol sip udp 5060 fixup protocol skinny 2000 fixup protocol smtp 25 fixup protocol sqlnet 1521 fixup protocol tftp 69 names pager lines 24 mtu outside 1500 mtu inside 1500 !--- Define IP addresses for the PIX's inside and outside interfaces. ip address outside 10.10.10.1 255.255.255.0 ip address inside 172.16.1.1 255.255.255.0 ip audit info action alarm ip audit attack action alarm pdm history enable arp timeout 14400 !--- Define the outside router as the default gateway. !--- Typically this is the IP address of your ISP's router. route outside 0.0.0.0 0.0.0.0 10.10.10.2 1 timeout xlate 3:00:00 timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h225 1:00:00 timeout h323 0:05:00 mgcp 0:05:00 sip 0:30:00 sip_media 0:02:00 timeout sip-disconnect 0:02:00 sip-invite 0:03:00 timeout uauth 0:05:00 absolute aaa-server TACACS+ protocol tacacs+ aaa-server TACACS+ max-failed-attempts 3 aaa-server TACACS+ deadtime 10 aaa-server RADIUS protocol radius aaa-server RADIUS max-failed-attempts 3 aaa-server RADIUS deadtime 10 aaa-server LOCAL protocol local no snmp-server location no snmp-server contact snmp-server community public no snmp-server enable traps floodguard enable telnet timeout 5 ssh timeout 5 console timeout 0 !--- Define the VPN peer IP address. vpnclient server 10.10.10.2 !--- Specify whether Client/PAT (Port Address Translation) mode !--- is to be used or whether Network Extension Mode (NEM) is to be used. vpnclient mode network-extension-mode !--- Define Easy VPN Remote parameters. !--- This is the pre-shared key used in IKE negotiation. vpnclient vpngroup hwclient password ******** !--- This is the extended authentication username and password. vpnclient username cisco password ******** !---This enables vpnclient on the PIX. vpnclient enable terminal width 80 Cryptochecksum:fdbd365f0b4cdc6707a50efeeeb8ed44 : end

PIX

pix506#show running-config
: Saved
:
PIX Version 6.3(5)


!--- Specify speed and duplex settings.

interface ethernet0 auto
interface ethernet1 auto
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password WwXYvtKrnjXqGbu1 encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
hostname pix506
domain-name cisco.com
fixup protocol dns maximum-length 512
fixup protocol ftp 21
fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719
fixup protocol http 80
fixup protocol rsh 514
fixup protocol rtsp 554
fixup protocol sip 5060
fixup protocol sip udp 5060
fixup protocol skinny 2000
fixup protocol smtp 25
fixup protocol sqlnet 1521
fixup protocol tftp 69
names
pager lines 24
mtu outside 1500
mtu inside 1500


!--- Define IP addresses for the PIX's inside and outside interfaces.

ip address outside 10.10.10.1 255.255.255.0
ip address inside 172.16.1.1 255.255.255.0
ip audit info action alarm
ip audit attack action alarm
pdm history enable
arp timeout 14400


!--- Define the outside router as the default gateway. !--- Typically this is the IP address of your ISP's router.

route outside 0.0.0.0 0.0.0.0 10.10.10.2 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h225 1:00:00
timeout h323 0:05:00 mgcp 0:05:00 sip 0:30:00 sip_media 0:02:00
timeout sip-disconnect 0:02:00 sip-invite 0:03:00
timeout uauth 0:05:00 absolute
aaa-server TACACS+ protocol tacacs+
aaa-server TACACS+ max-failed-attempts 3
aaa-server TACACS+ deadtime 10
aaa-server RADIUS protocol radius
aaa-server RADIUS max-failed-attempts 3
aaa-server RADIUS deadtime 10
aaa-server LOCAL protocol local
no snmp-server location
no snmp-server contact
snmp-server community public
no snmp-server enable traps
floodguard enable
telnet timeout 5
ssh timeout 5
console timeout 0


!--- Define the VPN peer IP address.

vpnclient server 10.10.10.2


!--- Specify whether Client/PAT (Port Address Translation) mode !--- is to be used or whether Network Extension Mode (NEM) is to be used.

vpnclient mode network-extension-mode


!--- Define Easy VPN Remote parameters. !--- This is the pre-shared key used in IKE negotiation.


vpnclient vpngroup hwclient password ********


!--- This is the extended authentication username and password.

vpnclient username cisco password ********


!---This enables vpnclient on the PIX.

vpnclient enable
terminal width 80
Cryptochecksum:fdbd365f0b4cdc6707a50efeeeb8ed44
: end

验证

PIX show 命令和示例输出

使用本部分可确认配置能否正常运行。

命令输出解释程序（仅限注册用户）(OIT) 支持某些 show 命令。使用 OIT 可查看对 show 命令输出的分析。

vpnclient enable 命令 - 启用 Easy VPN Remote 连接。在NEM中，即使没有要和头端Easy VPN服务器交换的触发数据流，隧道仍然是开启的。
```
pix506(config)#vpnclient enable
```

show crypto isakmp policy - 显示适用于每个 IKE 策略的参数。

pix506(config)#show crypto isakmp policy 

Default protection suite 
        encryption algorithm:  DES - Data Encryption Standard (56 bit keys). 
        hash algorithm:        Secure Hash Standard 
        authentication method: Rivest-Shamir-Adleman Signature 
        Diffie-Hellman group:  #1 (768 bit) 
        lifetime:              86400 seconds, no volume limit

本例显示启用硬件客户端之后 show crypto isakmp policy 命令的输出。

pix506(config)#show crypto isakmp policy 

Protection suite of priority 65001
       encryption algorithm: DES - Data Encryption Standard (56 bit keys).
       hash algorithm: Message Digest 5
       authentication method: Pre-Shared Key with XAUTH
       Diffie-Hellman group: #2 (1024 bit)
       lifetime: 86400 seconds, no volume limit
Protection suite of priority 65002
       encryption algorithm: DES - Data Encryption Standard (56 bit keys).
       hash algorithm: Message Digest 5
       authentication method: Pre-Shared Key
       Diffie-Hellman group: #2 (1024 bit)
       lifetime: 86400 seconds, no volume limit

show crypto ipsec transform - 显示当前的 IPSec 转换。
```
pix506(config)#show crypto ipsec transform
```
本例显示启用硬件客户端之后 show crypto ipsec transform 命令的输出。在使用 vpnclient enable 命令之前，只有一个默认的保护套件适用于 ISAKMP。发出此命令后，除了默认保护套件之外，Easy VPN Remote 还自动地生成四种方案。此外，在使用 enable 命令之前，没有任何 IPSec 转换集。发出此命令之后，将动态生成转换集。
```
pix506(config)#show crypto ipsec transform-set

Transform set _vpnc_tset_9: { esp-des esp-md5-hmac } 
will negotiate = { Tunnel, }, 

Transform set _vpnc_tset_10: { esp-null esp-md5-hmac } 
will negotiate = { Tunnel, }, 

Transform set _vpnc_tset_11: { esp-null esp-sha-hmac } 
will negotiate = { Tunnel, },
```

show crypto isakmp sa - 显示对等体上的所有当前 IKE SA。

pix506(config)#show crypto isakmp sa
Total     : 1
Embryonic : 0
        dst               src        state     pending     created
      10.10.10.2       10.10.10.1    QM_IDLE         0           2

show vpnclient - 显示 VPN 客户端或 Easy VPN Remote 设备的配置信息。

pix506(config)#show vpnclient

LOCAL CONFIGURATION
vpnclient server 10.10.10.2
vpnclient mode network-extension-mode
vpnclient vpngroup hwclient password ********
vpnclient username cisco password ********
vpnclient enable

DOWNLOADED DYNAMIC POLICY
Current Server                     : 10.10.10.2
Primary DNS                        : 172.22.1.101
Primary WINS                       : 172.22.1.102
Default Domain                     : cisco.com
PFS Enabled                        : No
Secure Unit Authentication Enabled : No
User Authentication Enabled        : No
Backup Servers                     : Deleted by order of the headend

show crypto ipsec sa - 显示对等体之间构建的 IPSec SA。

pix506(config)#show crypto ipsec sa 
interface: outside
    Crypto map tag: _vpnc_cm, local addr. 10.10.10.1

   local  ident (addr/mask/prot/port): (10.10.10.1/255.255.255.255/0/0)
   remote ident (addr/mask/prot/port): (0.0.0.0/0.0.0.0/0/0)
   current_peer: 10.10.10.2:500
     PERMIT, flags={origin_is_acl,}
    #pkts encaps: 3, #pkts encrypt: 3, #pkts digest 3
    #pkts decaps: 3, #pkts decrypt: 3, #pkts verify 3
    #pkts compressed: 0, #pkts decompressed: 0
    #pkts not compressed: 0, #pkts compr. failed: 0,
    #pkts decompress failed: 0
    #send errors 0, #recv errors 0

!--- As shown here, ping packets were successfully exchanged !--- between the Easy VPN Remote (PIX) and the Easy VPN Server (IOS).

local crypto endpt.: 10.10.10.1, remote crypto endpt.: 10.10.10.2
     path mtu 1500, ipsec overhead 56, media mtu 1500
     current outbound spi: 533f74a9

     inbound esp sas:
      spi: 0xad0984cc(2903082188)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Tunnel, }
        slot: 0, conn id: 4, crypto map: _vpnc_cm
        sa timing: remaining key lifetime (k/sec): (4607999/3001)
        IV size: 8 bytes
        replay detection support: Y


     inbound ah sas:


     inbound pcp sas:


     outbound esp sas:
      spi: 0x533f74a9(1396667561)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Tunnel, }
        slot: 0, conn id: 3, crypto map: _vpnc_cm
        sa timing: remaining key lifetime (k/sec): (4607999/3001)
        IV size: 8 bytes
        replay detection support: Y


     outbound ah sas:


     outbound pcp sas:



   local  ident (addr/mask/prot/port): (172.16.1.0/255.255.255.0/0/0)
   remote ident (addr/mask/prot/port): (0.0.0.0/0.0.0.0/0/0)
   current_peer: 10.10.10.2:500
     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 decompress failed: 0
    #send errors 0, #recv errors 0


!--- As shown here, ping packets were successfully exchanged !--- between hosts behind the Easy VPN Remote (PIX) and the Easy !--- VPN Server (IOS).

     local crypto endpt.: 10.10.10.1, remote crypto endpt.: 10.10.10.2
     path mtu 1500, ipsec overhead 56, media mtu 1500
     current outbound spi: 2eca448b

     inbound esp sas:
      spi: 0xc82c0695(3358328469)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Tunnel, }
        slot: 0, conn id: 2, crypto map: _vpnc_cm
        sa timing: remaining key lifetime (k/sec): (4607999/2997)
        IV size: 8 bytes
        replay detection support: Y


     inbound ah sas:


     inbound pcp sas:


     outbound esp sas:
      spi: 0x2eca448b(785007755)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Tunnel, }
        slot: 0, conn id: 1, crypto map: _vpnc_cm
        sa timing: remaining key lifetime (k/sec): (4607999/2988)
        IV size: 8 bytes
        replay detection support: Y


     outbound ah sas:


     outbound pcp sas:

show access-list - 显示访问列表的内容。

access-list cached ACL log flows: total 0, denied 0 (deny-flow-max 1024)
            alert-interval 300
access-list _vpnc_acl; 2 elements
access-list _vpnc_acl line 1 permit ip 172.16.1.0 255.255.255.0
 any (hitcnt=18)
access-list _vpnc_acl line 2 permit ip host 10.10.10.1
 any (hitcnt=6) 

!--- The above output shows the dynamically built access lists to identify !--- interesting traffic for encryption.

IOS show 命令和示例输出

show crypto isakmp sa - 显示对等体上的所有当前 IKE SA。

ezvpn_server#show crypto isakmp sa 
IPv4 Crypto ISAKMP SA
dst             src             state          conn-id slot status
10.10.10.2      10.10.10.1      QM_IDLE           1026    0 ACTIVE

show crypto ipsec sa - 显示对等体之间构建的 IPSec SA。

ezvpn_server#show crypto ipsec sa


!--- As shown above, ping packets were successfully exchanged !--- between the Easy VPN Remote (PIX) and the Easy VPN Server (IOS) !--- as well as hosts behind them.


interface: FastEthernet0/0
    Crypto map tag: clientmap, local addr 10.10.10.2

   protected vrf: (none)
   local  ident (addr/mask/prot/port): (0.0.0.0/0.0.0.0/0/0)
   remote ident (addr/mask/prot/port): (10.10.10.1/255.255.255.255/0/0)
   current_peer 10.10.10.1 port 500
     PERMIT, flags={}
    #pkts encaps: 3, #pkts encrypt: 3, #pkts digest: 3
    #pkts decaps: 3, #pkts decrypt: 3, #pkts verify: 3
    #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.: 10.10.10.2, remote crypto endpt.: 10.10.10.1
     path mtu 1500, ip mtu 1500
     current outbound spi: 0xAD0984CC(2903082188)

     inbound esp sas:
      spi: 0x533F74A9(1396667561)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Tunnel, }
        conn id: 21, flow_id: SW:21, crypto map: clientmap
        sa timing: remaining key lifetime (k/sec): (4470133/2836)
        IV size: 8 bytes
        replay detection support: Y
        Status: ACTIVE

     inbound ah sas:

     inbound pcp sas:

     outbound esp sas:
      spi: 0xAD0984CC(2903082188)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Tunnel, }
        conn id: 22, flow_id: SW:22, crypto map: clientmap
        sa timing: remaining key lifetime (k/sec): (4470133/2834)
        IV size: 8 bytes
        replay detection support: Y
        Status: ACTIVE

     outbound ah sas:

     outbound pcp sas:

   protected vrf: (none)
   local  ident (addr/mask/prot/port): (0.0.0.0/0.0.0.0/0/0)
   remote ident (addr/mask/prot/port): (172.16.1.0/255.255.255.0/0/0)
   current_peer 10.10.10.1 port 500
     PERMIT, flags={}
    #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 0, #recv errors 0

     local crypto endpt.: 10.10.10.2, remote crypto endpt.: 10.10.10.1
     path mtu 1500, ip mtu 1500
     current outbound spi: 0xC82C0695(3358328469)

     inbound esp sas:
      spi: 0x2ECA448B(785007755)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Tunnel, }
        conn id: 23, flow_id: SW:23, crypto map: clientmap
        sa timing: remaining key lifetime (k/sec): (4589382/2832)
        IV size: 8 bytes
        replay detection support: Y
        Status: ACTIVE

     inbound ah sas:

     inbound pcp sas:

     outbound esp sas:
      spi: 0xC82C0695(3358328469)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Tunnel, }
        conn id: 24, flow_id: SW:24, crypto map: clientmap
        sa timing: remaining key lifetime (k/sec): (4589382/2830)
        IV size: 8 bytes
        replay detection support: Y
        Status: ACTIVE

     outbound ah sas:

     outbound pcp sas:

故障排除

使用本部分可排除配置故障。

如果您按照本文描述已经设置了Easy VPN远程(PIX)和Easy VPN服务器(IOS)，但仍然存在问题，请从PIX和IOS中收集Debug输出，从show命令中收集输出，供思科技术支持中心(TAC)分析。请参见“排除已建立IPSec隧道上的PIX故障，以通过数据流量”，或者参见“IP安全故障排除--了解和使用debug命令。”在 PIX 上启用 IPsec 调试。

PIX debug 命令和示例输出

PIX debug 命令

注意：在使用debug命令之前，请参阅有关Debug命令的重要信息。

debug crypto ipsec - 显示第 2 阶段的 IPsec 协商。
debug crypto isakmp - 显示第 1 阶段的 ISAKMP 协商。

PIX 示例输出

ISAKMP (0): ID payload
next-payload : 13
type         : 11
protocol     : 17
port         : 0
length       : 12pix506(config)# 
ISAKMP (0): Total payload length: 16
ISAKMP (0:0): sending NAT-T vendor ID - rev 2 & 3
ISAKMP (0): beginning Aggressive Mode exchange
crypto_isakmp_process_block:src:10.10.10.2, dest:10.10.10.1 spt:500 dpt:500
OAK_AG exchange
ISAKMP (0): processing SA payload. message ID = 0


!--- The PIX checks the received proposal against !--- its dynamically generated policies looking for a match. 


ISAKMP (0): Checking ISAKMP transform 1 against priority 65001 policy
ISAKMP:      encryption DES-CBC
ISAKMP:      hash MD5
ISAKMP:      default group 2
ISAKMP:      extended auth pre-share (init)
ISAKMP:      life type in seconds
ISAKMP:      life duration (VPI) of  0x0 0x1 0x51 0x80 
ISAKMP (0): atts are not acceptable. Next payload is 0
ISAKMP (0): Checking ISAKMP transform 1 against priority 65002 policy
ISAKMP:      encryption DES-CBC
ISAKMP:      hash MD5
ISAKMP:      default group 2
ISAKMP:      extended auth pre-share (init)
ISAKMP:      life type in seconds
ISAKMP:      life duration (VPI) of  0x0 0x1 0x51 0x80 
ISAKMP (0): atts are not acceptable. Next payload is 0
ISAKMP (0): Checking ISAKMP transform 1 against priority 65003 policy
ISAKMP:      encryption DES-CBC
ISAKMP:      hash MD5
ISAKMP:      default group 2
ISAKMP:      extended auth pre-share (init)
ISAKMP:      life type in seconds
ISAKMP:      life duration (VPI) of  0x0 0x1 0x51 0x80 
ISAKMP (0): atts are not acceptable. Next payload is 0
ISAKMP (0): Checking ISAKMP transform 1 against priority 65004 policy
ISAKMP:      encryption DES-CBC
ISAKMP:      hash MD5
ISAKMP:      default group 2
ISAKMP:      extended auth pre-share (init)
ISAKMP:      life type in seconds
ISAKMP:      life duration (VPI) of  0x0 0x1 0x51 0x80 
ISAKMP (0): atts are not acceptable. Next payload is 0
ISAKMP (0): Checking ISAKMP transform 1 against priority 65005 policy
ISAKMP:      encryption DES-CBC
ISAKMP:      hash MD5
ISAKMP:      default group 2
ISAKMP:      extended auth pre-share (init)
ISAKMP:      life type in seconds
ISAKMP:      life duration (VPI) of  0x0 0x1 0x51 0x80 
ISAKMP (0): atts are not acceptable. Next payload is 0
ISAKMP (0): Checking ISAKMP transform 1 against priority 65006 policy
ISAKMP:      encryption DES-CBC
ISAKMP:      hash MD5
ISAKMP:      default group 2
ISAKMP:      extended auth pre-share (init)
ISAKMP:      life type in seconds
ISAKMP:      life duration (VPI) of  0x0 0x1 0x51 0x80 
ISAKMP (0): atts are not acceptable. Next payload is 0
ISAKMP (0): Checking ISAKMP transform 1 against priority 65007 policy
ISAKMP:      encryption DES-CBC
ISAKMP:      hash MD5
ISAKMP:      default group 2
ISAKMP:      extended auth pre-share (init)
ISAKMP:      life type in seconds
ISAKMP:      life duration (VPI) of  0x0 0x1 0x51 0x80 
ISAKMP (0): atts are not acceptable. Next payload is 0
ISAKMP (0): Checking ISAKMP transform 1 against priority 65008 policy
ISAKMP:      encryption DES-CBC
ISAKMP:      hash MD5
ISAKMP:      default group 2
ISAKMP:      extended auth pre-share (init)
ISAKMP:      life type in seconds
ISAKMP:      life duration (VPI) of  0x0 0x1 0x51 0x80 
ISAKMP (0): atts are not acceptable. Next payload is 0
ISAKMP (0): Checking ISAKMP transform 1 against priority 65009 policy
ISAKMP:      encryption DES-CBC
ISAKMP:      hash MD5
ISAKMP:      default group 2
ISAKMP:      extended auth pre-share (init)
ISAKMP:      life type in seconds
ISAKMP:      life duration (VPI) of  0x0 0x1 0x51 0x80 
ISAKMP (0): atts are acceptable. Next payload is 0
ISAKMP (0): processing vendor id payload

ISAKMP (0): processing vendor id payload

ISAKMP (0): remote peer supports dead peer detection

ISAKMP (0): processing vendor id payload

crypto_isakmp_process_block:src:10.10.10.2, dest:10.10.10.1 spt:500 dpt:500
crypto_isakmp_process_block:src:10.10.10.2, dest:10.10.10.1 spt:500 dpt:500
ISAKMP : attributes being requested

crypto_isakmp_process_block:src:10.10.10.2, dest:10.10.10.1 spt:500 dpt:500
ISAKMP (0): beginning Quick Mode exchange, M-ID of -582033986:dd4eddbeIPSEC
(key_engine): got a queue event...
IPSEC(spi_response): getting spi 0x61cf8d08(1640992008) for SA 
from      10.10.10.2 to      10.10.10.1 for prot 3

crypto_isakmp_process_block:src:10.10.10.2, dest:10.10.10.1 spt:500 dpt:500
OAK_QM exchange
oakley_process_quick_mode:
OAK_QM_IDLE
ISAKMP (0): processing SA payload. message ID = 3712933310

ISAKMP : Checking IPSec proposal 1

ISAKMP: transform 1, ESP_DES
ISAKMP:   attributes in transform:
ISAKMP:      encaps is 1
ISAKMP:      SA life type in seconds
ISAKMP:      SA life duration (basic) of 28800
ISAKMP:      SA life type in kilobytes
ISAKMP:      SA life duration (VPI) of  0x0 0x46 0x50 0x0 
ISAKMP:      authenticator is HMAC-MD5
ISAKMP (0): atts are acceptable.IPSEC(validate_proposal_request): proposal part #1,
  (key eng. msg.) dest= 10.10.10.2, src= 10.10.10.1, 
    dest_proxy= 0.0.0.0/0.0.0.0/0/0 (type=4), 
    src_proxy= 10.10.10.1/255.255.255.255/0/0 (type=1),
    protocol= ESP, transform= esp-des esp-md5-hmac , 
    lifedur= 0s and 0kb, 
    spi= 0x0(0), conn_id= 0, keysize= 0, flags= 0x4

ISAKMP (0): processing NONCE payload. message ID = 3712933310

ISAKMP (0): processing ID payload. message ID = 3712933310
ISAKMP (0): processing ID payload. message ID = 3712933310
ISAKMP (0): processing NOTIFY payload 24576 protocol 3
spi 1327036890, message ID = 3712933310
ISAKMP (0): processing responder lifetime
ISAKMP (0): responder lifetime of 3600s
ISAKMP (0): Creating IPSec SAs
        inbound SA from   10.10.10.2 to   10.10.10.1 (proxy 0.0.0.0 to 10.10.10.1)
        has spi 1640992008 and conn_id 1 and flags 4
        lifetime of 3600 seconds
        lifetime of 4608000 kilobytes
        outbound SA from  10.10.10.1 to   10.10.10.2 (proxy 10.10.10.1 to 0.0.0.0)
        has spi 1327036890 and conn_id 2 and flags 4
        lifetime of 3600 seconds
        lifetime of 4608000 kilobytesIPSEC(key_engine): got a queue event...
IPSEC(initialize_sas): ,
  (key eng. msg.) dest= 10.10.10.1, src= 10.10.10.2, 
    dest_proxy= 10.10.10.1/255.255.255.255/0/0 (type=1), 
    src_proxy= 0.0.0.0/0.0.0.0/0/0 (type=4),
    protocol= ESP, transform= esp-des esp-md5-hmac , 
    lifedur= 3600s and 4608000kb, 
    spi= 0x61cf8d08(1640992008), conn_id= 1, keysize= 0, flags= 0x4
IPSEC(initialize_sas): ,
  (key eng. msg.) src= 10.10.10.1, dest= 10.10.10.2, 
    src_proxy= 10.10.10.1/255.255.255.255/0/0 (type=1), 
    dest_proxy= 0.0.0.0/0.0.0.0/0/0 (type=4),
    protocol= ESP, transform= esp-des esp-md5-hmac , 
    lifedur= 3600s and 4608000kb, 
    spi= 0x4f18f9da(1327036890), conn_id= 2, keysize= 0, flags= 0x4


!--- The IPSec SAs shown above are for management purposes.


VPN Peer: IPSEC: Peer ip:10.10.10.2/500 Ref cnt incremented to:2 Total VPN Peers:1
VPN Peer: IPSEC: Peer ip:10.10.10.2/500 Ref cnt incremented to:3 Total VPN Peers:1
return status is IKMP_NO_ERROR
ISAKMP (0): beginning Quick Mode exchange, M-ID of -419501328:e6feeaf0IPSEC
(key_engine): got a queue event...
IPSEC(spi_response): getting spi 0xf3d52246(4090831430) for SA 
from      10.10.10.2 to      10.10.10.1 for prot 3

crypto_isakmp_process_block:src:10.10.10.2, dest:10.10.10.1 spt:500 dpt:500
OAK_QM exchange
oakley_process_quick_mode:
OAK_QM_IDLE
ISAKMP (0): processing SA payload. message ID = 3875465968

ISAKMP : Checking IPSec proposal 1

ISAKMP: transform 1, ESP_DES
ISAKMP:   attributes in transform:
ISAKMP:      encaps is 1
ISAKMP:      SA life type in seconds
ISAKMP:      SA life duration (basic) of 28800
ISAKMP:      SA life type in kilobytes
ISAKMP:      SA life duration (VPI) of  0x0 0x46 0x50 0x0 
ISAKMP:      authenticator is HMAC-MD5
ISAKMP (0): atts are acceptable.IPSEC(validate_proposal_request): proposal part #1,
  (key eng. msg.) dest= 10.10.10.2, src= 10.10.10.1, 
    dest_proxy= 0.0.0.0/0.0.0.0/0/0 (type=4), 
    src_proxy= 172.16.1.0/255.255.255.0/0/0 (type=4),
    protocol= ESP, transform= esp-des esp-md5-hmac , 
    lifedur= 0s and 0kb, 
    spi= 0x0(0), conn_id= 0, keysize= 0, flags= 0x4

ISAKMP (0): processing NONCE payload. message ID = 3875465968

ISAKMP (0): processing ID payload. message ID = 3875465968
ISAKMP (0): processing ID payload. message ID = 3875465968
ISAKMP (0): processing NOTIFY payload 24576 protocol 3
spi 465396864, message ID = 3875465968
ISAKMP (0): processing responder lifetime
ISAKMP (0): responder lifetime of 3600s
ISAKMP (0): Creating IPSec SAs
        inbound SA from   10.10.10.2 to 10.10.10.1 (proxy 0.0.0.0 to 172.16.1.0)
        has spi 4090831430 and conn_id 3 and flags 4
        lifetime of 3600 seconds
        lifetime of 4608000 kilobytes
        outbound SA from  10.10.10.1 to 10.10.10.2 (proxy 172.16.1.0 to 0.0.0.0)
        has spi 465396864 and conn_id 4 and flags 4
        lifetime of 3600 seconds
        lifetime of 4608000 kilobytesIPSEC(key_engine): got a queue event...
IPSEC(initialize_sas): ,
  (key eng. msg.) dest= 10.10.10.1, src= 10.10.10.2, 
    dest_proxy= 172.16.1.0/255.255.255.0/0/0 (type=4), 
    src_proxy= 0.0.0.0/0.0.0.0/0/0 (type=4),
    protocol= ESP, transform= esp-des esp-md5-hmac , 
    lifedur= 3600s and 4608000kb, 
    spi= 0xf3d52246(4090831430), conn_id= 3, keysize= 0, flags= 0x4
IPSEC(initialize_sas): ,
  (key eng. msg.) src= 10.10.10.1, dest= 10.10.10.2, 
    src_proxy= 172.16.1.0/255.255.255.0/0/0 (type=4), 
    dest_proxy= 0.0.0.0/0.0.0.0/0/0 (type=4),
    protocol= ESP, transform= esp-des esp-md5-hmac , 
    lifedur= 3600s and 4608000kb, 
    spi= 0x1bbd6480(465396864), conn_id= 4, keysize= 0, flags= 0x4


!--- The IPSec SAs shown above are for actual data traffic.


VPN Peer: IPSEC: Peer ip:10.10.10.2/500 Ref cnt incremented to:4 Total VPN Peers:1
VPN Peer: IPSEC: Peer ip:10.10.10.2/500 Ref cnt incremented to:5 Total VPN Peers:1

IOS debug 命令和示例输出

IOS debug 命令