在两个路由器和 Cisco VPN 客户端 4.x 之间配置 IPSec

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已更新: 2007 年 5 月 10 日

文档 ID:20982

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简介

本文档展示如何在两个 Cisco 路由器与 Cisco VPN 客户端 4.x 之间配置 IPsec。Cisco IOS® 软件版本 12.2(8)T 及更高版本支持从 Cisco VPN 客户端 3.x 及更高版本进行连接。

请参阅配置 IPsec 路由器动态 LAN-to-LAN 对等体和 VPN 客户端，了解更多有关 L2L 隧道的一端由另一端动态分配 IP 地址的场景的信息。

配置

本部分提供用于配置本文档所述功能的信息。

网络图

本文档使用此网络设置。

注意：本示例中的IP地址在全局Internet中不可路由，因为它们是实验网络中的私有IP地址。

配置

配置 Cisco 2611 路由器

Cisco 2611 路由器
vpn2611#show run Building configuration... Current configuration : 2265 bytes ! version 12.2 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname vpn2611 ! !--- Enable AAA for user authentication !--- and group authorization. aaa new-model ! ! !--- In order to enable X-Auth for user authentication, !--- enable the aaa authentication* commands.* aaa authentication login userauthen local !--- In order to enable group authorization, enable !--- the aaa authorization* commands.* aaa authorization network groupauthor local aaa session-id common ! !--- For local authentication of the IPSec user, !--- create the user with a password. username cisco password 0 cisco ip subnet-zero ! ! ! ip audit notify log ip audit po max-events 100 ! !--- Create an Internet Security Association and !--- Key Management Protocol (ISAKMP) !--- policy for Phase 1 negotiations for the VPN 3.x Clients. crypto isakmp policy 3 encr 3des authentication pre-share group 2 ! !--- Create an ISAKMP policy for Phase 1 !--- negotiations for the LAN-to-LAN tunnels. crypto isakmp policy 10 hash md5 authentication pre-share !--- Specify the PreShared key for the LAN-to-LAN tunnel. !--- Make sure that you use the !--- no-xauth* parameter with your ISAKMP key.* crypto isakmp key cisco123 address 172.18.124.199 no-xauth ! !--- Create a group that is used to !--- specify the WINS, DNS servers' address !--- to the client, along with the pre-shared !--- key for authentication. crypto isakmp client configuration group 3000client key cisco123 dns 10.10.10.10 wins 10.10.10.20 domain cisco.com pool ippool ! ! !--- Create the Phase 2 Policy for actual data encryption. crypto ipsec transform-set myset esp-3des esp-md5-hmac ! !--- Create a dynamic map and apply !--- the transform set that was created earlier. crypto dynamic-map dynmap 10 set transform-set myset ! ! !--- Create the actual crypto map, and !--- apply the AAA lists that were created !--- earlier. Also create a new instance for your !--- LAN-to-LAN tunnel. Specify the peer IP address, !--- transform set, and an Access Control List (ACL) for this !--- instance. crypto map clientmap client authentication list userauthen crypto map clientmap isakmp authorization list groupauthor crypto map clientmap client configuration address respond crypto map clientmap 1 ipsec-isakmp set peer 172.18.124.199 set transform-set myset match address 100 crypto map clientmap 10 ipsec-isakmp dynamic dynmap ! ! fax interface-type fax-mail mta receive maximum-recipients 0 ! ! !--- Apply the crypto map* on the outside interface.* interface Ethernet0/0 ip address 172.18.124.159 255.255.255.0 half-duplex crypto map clientmap ! interface Serial0/0 no ip address shutdown ! interface Ethernet0/1 ip address 10.10.10.1 255.255.255.0 no keepalive half-duplex ! ! !--- Create a pool of addresses to be !--- assigned to the VPN Clients. ip local pool ippool 14.1.1.100 14.1.1.200 ip classless ip route 0.0.0.0 0.0.0.0 172.18.124.1 ip http server ip pim bidir-enable ! ! !--- Create an ACL for the traffic !--- to be encrypted. In this example, !--- the traffic from 10.10.10.0/24 to 10.10.20.0/24 !--- is encrypted. access-list 100 permit ip 10.10.10.0 0.0.0.255 10.10.20.0 0.0.0.255 ! ! snmp-server community foobar RO call rsvp-sync ! ! mgcp profile default ! dial-peer cor custom ! ! line con 0 exec-timeout 0 0 line aux 0 line vty 0 4 ! ! end

Cisco 2611 路由器

vpn2611#show run
Building configuration...

Current configuration : 2265 bytes
!
version 12.2
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname vpn2611
!

!--- Enable AAA for user authentication !--- and group authorization.

aaa new-model
!
!

!--- In order to enable X-Auth for user authentication, !--- enable the aaa authentication commands.

aaa authentication login userauthen local

!--- In order to enable group authorization, enable !--- the aaa authorization commands.

aaa authorization network groupauthor local
aaa session-id common
!

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

username cisco password 0 cisco
ip subnet-zero
!
!
!
ip audit notify log
ip audit po max-events 100
!

!--- Create an Internet Security Association and !--- Key Management Protocol (ISAKMP) !--- policy for Phase 1 negotiations for the VPN 3.x Clients.

crypto isakmp policy 3
encr 3des
authentication pre-share
group 2
!

!--- Create an ISAKMP policy for Phase 1 !--- negotiations for the LAN-to-LAN tunnels.

crypto isakmp policy 10
hash md5
authentication pre-share

!--- Specify the PreShared key for the LAN-to-LAN tunnel. !--- Make sure that you use the !--- no-xauth parameter with your ISAKMP key.

crypto isakmp key cisco123 address 172.18.124.199 no-xauth
!

!--- Create a group that is used to !--- specify the WINS, DNS servers' address !--- to the client, along with the pre-shared !--- key for authentication.

crypto isakmp client configuration group 3000client
key cisco123
dns 10.10.10.10
wins 10.10.10.20
domain cisco.com
pool ippool
!
!

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

crypto ipsec transform-set myset esp-3des esp-md5-hmac
!

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

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

!--- Create the actual crypto map, and !--- apply the AAA lists that were created !--- earlier. Also create a new instance for your !--- LAN-to-LAN tunnel. Specify the peer IP address, !--- transform set, and an Access Control List (ACL) for this !--- instance.

crypto map clientmap client authentication list userauthen
crypto map clientmap isakmp authorization list groupauthor
crypto map clientmap client configuration address respond
crypto map clientmap 1 ipsec-isakmp
set peer 172.18.124.199
set transform-set myset
match address 100
crypto map clientmap 10 ipsec-isakmp dynamic dynmap
!
!
fax interface-type fax-mail
mta receive maximum-recipients 0
!
!

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

interface Ethernet0/0
ip address 172.18.124.159 255.255.255.0
half-duplex
crypto map clientmap
!
interface Serial0/0
no ip address
shutdown
!
interface Ethernet0/1
ip address 10.10.10.1 255.255.255.0
no keepalive
half-duplex
!
!

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

ip local pool ippool 14.1.1.100 14.1.1.200
ip classless
ip route 0.0.0.0 0.0.0.0 172.18.124.1
ip http server
ip pim bidir-enable
!
!

!--- Create an ACL for the traffic !--- to be encrypted. In this example, !--- the traffic from 10.10.10.0/24 to 10.10.20.0/24 !--- is encrypted.

access-list 100 permit ip 10.10.10.0 0.0.0.255 10.10.20.0 0.0.0.255
!
!
snmp-server community foobar RO
call rsvp-sync
!
!
mgcp profile default
!
dial-peer cor custom
!
!
line con 0
exec-timeout 0 0
line aux 0
line vty 0 4
!
!
end

配置 3640 路由器

Cisco 3640 路由器
vpn3640#show run Building configuration... Current configuration : 1287 bytes ! ! Last configuration change at 13:47:37 UTC Wed Mar 6 2002 ! version 12.2 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname vpn3640 ! ! ip subnet-zero ip cef ! !--- Create an ISAKMP policy for Phase 1 !--- negotiations for the LAN-to-LAN tunnels. crypto isakmp policy 10 hash md5 authentication pre-share !--- Specify the PreShared key for the LAN-to-LAN !--- tunnel. You do not have to add the !--- X-Auth* parameter, as this !--- router does not do Cisco Unity Client IPsec !--- authentication.* crypto isakmp key cisco123 address 172.18.124.159 ! ! !--- Create the Phase 2 Policy for actual data encryption. crypto ipsec transform-set myset esp-3des esp-md5-hmac ! !--- Create the actual crypto map. Specify !--- the peer IP address, transform !--- set, and an ACL for this instance. crypto map mymap 10 ipsec-isakmp set peer 172.18.124.159 set transform-set myset match address 100 ! call RSVP-sync ! ! ! !--- Apply the crypto map on the outside interface. interface Ethernet0/0 ip address 172.18.124.199 255.255.255.0 half-duplex crypto map mymap ! interface Ethernet0/1 ip address 10.10.20.1 255.255.255.0 half-duplex ! ip classless ip route 0.0.0.0 0.0.0.0 172.18.124.1 ip http server ip pim bidir-enable ! !--- Create an ACL for the traffic to !--- be encrypted. In this example, !--- the traffic from 10.10.20.0/24 to 10.10.10.0/24 !--- is encrypted. access-list 100 permit ip 10.10.20.0 0.0.0.255 10.10.10.0 0.0.0.255 snmp-server community foobar RO ! dial-peer cor custom ! ! line con 0 exec-timeout 0 0 line aux 0 line vty 0 4 login ! end

Cisco 3640 路由器

vpn3640#show run
Building configuration...

Current configuration : 1287 bytes
!
! Last configuration change at 13:47:37 UTC Wed Mar 6 2002
!
version 12.2
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname vpn3640
!
!
ip subnet-zero
ip cef
!

!--- Create an ISAKMP policy for Phase 1 !--- negotiations for the LAN-to-LAN tunnels.

crypto isakmp policy 10
hash md5
authentication pre-share


!--- Specify the PreShared key for the LAN-to-LAN !--- tunnel. You do not have to add the !--- X-Auth parameter, as this !--- router does not do Cisco Unity Client IPsec !--- authentication.

crypto isakmp key cisco123 address 172.18.124.159
!
!


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

crypto ipsec transform-set myset esp-3des esp-md5-hmac 
!


!--- Create the actual crypto map. Specify !--- the peer IP address, transform !--- set, and an ACL for this instance.

crypto map mymap 10 ipsec-isakmp 
set peer 172.18.124.159
set transform-set myset 
match address 100
!
call RSVP-sync
!
!
!


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

interface Ethernet0/0
ip address 172.18.124.199 255.255.255.0
half-duplex
crypto map mymap
!
interface Ethernet0/1
ip address 10.10.20.1 255.255.255.0
half-duplex
!
ip classless
ip route 0.0.0.0 0.0.0.0 172.18.124.1
ip http server
ip pim bidir-enable
!


!--- Create an ACL for the traffic to !--- be encrypted. In this example, !--- the traffic from 10.10.20.0/24 to 10.10.10.0/24 !--- is encrypted.

access-list 100 permit ip 10.10.20.0 0.0.0.255 10.10.10.0 0.0.0.255
snmp-server community foobar RO
!
dial-peer cor custom
!
!
line con 0
exec-timeout 0 0
line aux 0
line vty 0 4
login
!
end

配置 VPN 客户端 4.x

请按照下面的步骤配置 Cisco VPN 客户端 4.x。

启动 VPN 客户端，然后单击 New 以创建新连接。
输入必要信息，完成后单击 Save。
右键单击最近创建的连接条目，然后单击 Connect 以连接到路由器。
在 IPSec 协商期间，系统提示输入用户名和口令。
窗口将显示“Negotiating security profiles”和“Your link is now secure”消息。

验证

本部分提供可帮助您确认配置是否正常运行的信息。

命令输出解释程序工具（仅限注册用户）支持某些 show 命令，使用此工具可以查看对 show 命令输出的分析。

Cisco VPN 2611

vpn2611#show crypto isakmp sa
dst src state conn-id slot
172.18.124.159 172.18.124.199 QM_IDLE 5 0    

!--- For the LAN-to-LAN tunnel peer.

172.18.124.159 64.102.55.142 QM_IDLE 6 0     

!--- For the Cisco Unity Client tunnel peer.



vpn2611#show crypto ipsec sa

interface: Ethernet0/0
Crypto map tag: clientmap, local addr. 172.18.124.159

protected vrf:
local ident (addr/mask/prot/port): (10.10.10.0/255.255.255.0/0/0)
remote ident (addr/mask/prot/port): (10.10.20.0/255.255.255.0/0/0)
current_peer: 172.18.124.199:500		

!--- For the LAN-to-LAN tunnel peer.

PERMIT, flags={origin_is_acl,}
#pkts encaps: 4, #pkts encrypt: 4, #pkts digest 4
#pkts decaps: 4, #pkts decrypt: 4, #pkts verify 4
#pkts compressed: 0, #pkts decompressed: 0
#pkts not compressed: 0, #pkts compr. failed: 0, #pkts decompress 
failed: 0
#send errors 0, #recv errors 0

local crypto endpt.: 172.18.124.159, remote crypto endpt.: 
172.18.124.199
path mtu 1500, media mtu 1500
current outbound spi: 892741BC

inbound esp sas:
spi: 0x7B7B2015(2071666709)
transform: esp-3des esp-md5-hmac ,
in use settings ={Tunnel, }
slot: 0, conn id: 2000, flow_id: 1, crypto map: clientmap
sa timing: remaining key lifetime (k/sec): (4607999/1182)
IV size: 8 bytes
replay detection support: Y

inbound ah sas:

inbound pcp sas:

outbound ESP sas:
spi: 0x892741BC(2301051324)
transform: esp-3des esp-md5-hmac ,
in use settings ={Tunnel, }
slot: 0, conn id: 2001, flow_id: 2, crypto map: clientmap
sa timing: remaining key lifetime (k/sec): (4607999/1182)
IV size: 8 bytes
replay detection support: Y

outbound ah sas:

outbound PCP sas:

protected vrf:
local ident (addr/mask/prot/port): (172.18.124.159/255.255.255.255/0/0)
remote ident (addr/mask/prot/port): (14.1.1.106/255.255.255.255/0/0)
current_peer: 64.102.55.142:500		

!--- For the Cisco Unity Client tunnel peer.

PERMIT, flags={}
#pkts encaps: 0, #pkts encrypt: 0, #pkts digest 0
#pkts decaps: 0, #pkts decrypt: 0, #pkts verify 0
#pkts compressed: 0, #pkts decompressed: 0
#pkts not compressed: 0, #pkts compr. Failed: 0, #pkts decompress 
failed: 0
#send errors 0, #recv errors 0

local crypto endpt.: 172.18.124.159, remote crypto endpt.: 
64.102.55.142
path mtu 1500, media mtu 1500
current outbound spi: 81F39EFA

inbound ESP sas:
spi: 0xC4483102(3293065474)
transform: esp-3des esp-md5-hmac ,
in use settings ={Tunnel, }
slot: 0, conn id: 2002, flow_id: 3, crypto map: clientmap
sa timing: remaining key lifetime (k/sec): (4608000/3484)
IV size: 8 bytes
replay detection support: Y

inbound ah sas:

inbound PCP sas:

outbound ESP sas:
spi: 0x81F39EFA(2180226810)
transform: esp-3des esp-md5-hmac ,
in use settings ={Tunnel, }
slot: 0, conn id: 2003, flow_id: 4, crypto map: clientmap
sa timing: remaining key lifetime (k/sec): (4608000/3484)
IV size: 8 bytes
replay detection support: Y

outbound ah sas:

outbound PCP sas:

protected vrf:
local ident (addr/mask/prot/port): (0.0.0.0/0.0.0.0/0/0)
remote ident (addr/mask/prot/port): (14.1.1.106/255.255.255.255/0/0)
current_peer: 64.102.55.142:500		

!--- For the Cisco Unity Client tunnel peer.

PERMIT, flags={}
#pkts encaps: 4, #pkts encrypt: 4, #pkts digest 4
#pkts decaps: 20, #pkts decrypt: 20, #pkts verify 20
#pkts compressed: 0, #pkts decompressed: 0
#pkts not compressed: 0, #pkts compr. Failed: 0, #pkts decompress 
failed: 0
#send errors 0, #recv errors 0

local crypto endpt.: 172.18.124.159, remote crypto endpt.: 
64.102.55.142
path mtu 1500, media mtu 1500
current outbound spi: B7F84138

inbound ESP sas:
spi: 0x5209917C(1376358780)
transform: esp-3des esp-md5-hmac ,
in use settings ={Tunnel, }
slot: 0, conn id: 2004, flow_id: 5, crypto map: clientmap
sa timing: remaining key lifetime (k/sec): (4607998/3474)
IV size: 8 bytes
replay detection support: Y
spi: 0xDE6C99C0(3731659200)
transform: esp-3des esp-md5-hmac ,
in use settings ={Tunnel, }
slot: 0, conn id: 2006, flow_id: 7, crypto map: clientmap
sa timing: remaining key lifetime (k/sec): (4607998/3493)
IV size: 8 bytes
replay detection support: Y

inbound ah sas:

inbound PCP sas:

outbound ESP sas:
spi: 0x58886878(1485334648)
transform: esp-3des esp-md5-hmac ,
in use settings ={Tunnel, }
slot: 0, conn id: 2005, flow_id: 6, crypto map: clientmap
sa timing: remaining key lifetime (k/sec): (4608000/3474)
IV size: 8 bytes
replay detection support: Y
spi: 0xB7F84138(3086500152)
transform: esp-3des esp-md5-hmac ,
in use settings ={Tunnel, }
slot: 0, conn id: 2007, flow_id: 8, crypto map: clientmap
sa timing: remaining key lifetime (k/sec): (4607999/3486)
IV size: 8 bytes
replay detection support: Y

outbound ah sas:

outbound PCP sas:



vpn2611#show crypto engine connection active
ID Interface IP-Address State Algorithm Encrypt Decrypt
5 Ethernet0/0 172.18.124.159 set HMAC_MD5+DES_56_CB 0 0
6 Ethernet0/0 172.18.124.159 set HMAC_SHA+3DES_56_C 0 0
2000 Ethernet0/0 172.18.124.159 set HMAC_MD5+3DES_56_C 0 4
2001 Ethernet0/0 172.18.124.159 set HMAC_MD5+3DES_56_C 4 0
2002 Ethernet0/0 172.18.124.159 set HMAC_MD5+3DES_56_C 0 0
2003 Ethernet0/0 172.18.124.159 set HMAC_MD5+3DES_56_C 0 0
2004 Ethernet0/0 172.18.124.159 set HMAC_MD5+3DES_56_C 0 9
2005 Ethernet0/0 172.18.124.159 set HMAC_MD5+3DES_56_C 0 0
2006 Ethernet0/0 172.18.124.159 set HMAC_MD5+3DES_56_C 0 79
2007 Ethernet0/0 172.18.124.159 set HMAC_MD5+3DES_56_C 4 0
vpn2611#

Cisco VPN 3640

vpn3640#show crypto isakmp sa
 DST src state conn-id slot
 172.18.124.159 172.18.124.199 QM_IDLE 4 0        

 !--- For the LAN-to-LAN tunnel peer.

 
 vpn3640#show crypto ipsec sa
 
 interface: Ethernet0/0
 Crypto map tag: mymap, local addr. 172.18.124.199
 
protected vrf:
 local ident (addr/mask/prot/port): (10.10.20.0/255.255.255.0/0/0)
 remote ident (addr/mask/prot/port): (10.10.10.0/255.255.255.0/0/0)
 current_peer: 172.18.124.159:500            
 
!--- For the LAN-to-LAN tunnel peer.

 PERMIT, flags={origin_is_acl,}
 #pkts encaps: 4, #pkts encrypt: 4, #pkts digest 4
 #pkts decaps: 4, #pkts decrypt: 4, #pkts verify 4
 #pkts compressed: 0, #pkts decompressed: 0
 #pkts not compressed: 0, #pkts compr. Failed: 0, #pkts decompress failed: 0
 #send errors 11, #recv errors 0
 
 local crypto endpt.: 172.18.124.199, remote crypto endpt.: 172.18.124.159
 path mtu 1500, media mtu 1500
 current outbound spi: 7B7B2015
 
 inbound ESP sas:
 spi: 0x892741BC(2301051324)
 transform: esp-3des esp-md5-hmac ,
 in use settings ={Tunnel, }
 slot: 0, conn id: 940, flow_id: 1, crypto map: mymap
 sa timing: remaining key lifetime (k/sec): (4607998/1237)
 IV size: 8 bytes
 replay detection support: Y
 
 inbound ah sas:
 
 inbound PCP sas:
 
 outbound ESP sas:
 spi: 0x7B7B2015(2071666709)
 transform: esp-3des esp-md5-hmac ,
 in use settings ={Tunnel, }
 slot: 0, conn id: 941, flow_id: 2, crypto map: mymap
 sa timing: remaining key lifetime (k/sec): (4607999/1237)
 IV size: 8 bytes
 replay detection support: Y
 
 outbound ah sas:
 
 outbound PCP sas:
 
 
 vpn3640# show crypto engine connection active
 
 ID Interface IP-Address State Algorithm Encrypt Decrypt
 4 
      
       
       
         set HMAC_MD5+DES_56_CB 0 0 
        
      
940 Ethernet0/0 172.18.124.199 set HMAC_MD5+3DES_56_C 0 4
 941 Ethernet0/0 172.18.124.199 set HMAC_MD5+3DES_56_C 4 0

验证加密映射序列号

如果在同一加密映射中配置了静态和动态对等体，则加密映射条目的顺序非常重要。动态加密映射条目的序列号必须高于其他所有静态加密映射条目。如果静态条目编号高于动态条目，则与这些对等体的连接将发生故障。

以下是一个正确编号的加密映射示例，其中包含一个静态条目和一个动态条目。请注意，动态条目具有最高的序列号，并且已留下空间以便添加其他静态条目：

crypto dynamic-map dynmap 10
set transform-set myset 
crypto map clientmap 1 ipsec-isakmp 
set peer 172.18.124.199
set transform-set myset 
match address 100
crypto map clientmap 10 ipsec-isakmp dynamic dynmap

故障排除

本部分提供帮助对配置进行故障排除的信息。

故障排除命令

命令输出解释程序工具（仅限注册用户）支持某些 show 命令，使用此工具可以查看对 show 命令输出的分析。

注：在发出debug命令之前，请参阅有关Debug命令的重要信息。

debug crypto ipsec — 显示 IPSec 事件。该命令前面加上 no 表示禁止调试输出。
debug crypto isakmp — 显示关于 IKE 事件的消息。该命令前面加上 no 表示禁止调试输出。
debug crypto engine — 显示关于加密引擎的信息，如 Cisco IOS 软件进行加密或解密操作时。

在两个路由器和 Cisco VPN 客户端 4.x 之间配置 IPSec

下载选项

非歧视性语言

关于此翻译

目录

简介

先决条件

要求

使用的组件

规则

配置

网络图

配置

配置 Cisco 2611 路由器

配置 3640 路由器

配置 VPN 客户端 4.x

验证

Cisco VPN 2611

Cisco VPN 3640

验证加密映射序列号

故障排除

故障排除命令

相关信息

修订历史记录

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