在两个有叠加专用网络的IOS路由器之间的IPSec配置示例

在本例中， Site_A路由器进行一个双向转换，以便两个专用LAN能在IPSec隧道通信。转换意味着Private_LAN1 “看到” Private_LAN2作为10.10.10.0/24通过IPSec隧道，并且Private_LAN2 “看到” Private_LAN1作为10.5.5.0/24通过IPSec隧道。

配置

本文档使用以下配置：

Site_A路由器SDM配置
Site_A路由器CLI配置
Site_B路由器配置

Site_A路由器SDM配置

注意： 本文假设，路由器配置与基本设置类似接口配置使用SDM欲知更多信息，等等参考的基本路由器配置。

NAT 配置

完成这些步骤为了使用NAT配置在Site_A路由器的SDM ：

选择配置> NAT > Edit NAT配置，并且点击指定NAT接口为了定义委托和不信任的接口如显示。
单击 Ok。
单击添加为了配置NAT转换从里向外方向如显示。
单击 Ok。
再次，请单击添加为了配置NAT转换从外向里方向如显示。

单击 Ok。

注意： 这是等同CLI配置：

等效 CLI 配置
interface Loopback0 ip nat inside interface Ethernet0/0 ip nat inside ip nat inside source static network 192.168.1.0 10.5.5.0 /24 ip nat outside source static network 192.168.1.0 10.10.10.0 /24

VPN 配置

完成这些步骤为了使用VPN配置在Site_A路由器的SDM ：

如此镜像所显示，选择配置> VPN > VPN组件>IKE > IKE策略>Add为了定义IKE策略。

单击 Ok。

注意： 这是等同CLI配置：

等效 CLI 配置
crypto isakmp policy 10 encr des hash md5 authentication pre-share group1

选择配置> VPN > VPN组件>IKE >预先共享密钥>Add为了设置Pre-Shared Key值与对端IP地址。

单击 Ok。

注意： 这是等同CLI配置：

等效 CLI 配置
crypto isakmp key 6 L2L12345 address 172.16.1.2 255.255.255.0

如此镜像所显示，选择配置> VPN > VPN组件> IPSec >转换集>Add为了创建转换集合myset。
单击 Ok。

注意： 这是等同CLI配置：
等效 CLI 配置
crypto ipsec transform-set myset esp-des esp-md5-hmac
选择配置> VPN > VPN组件> IPSec > IPSec规则(ACLs) >Add为了创建crypto Access Control List(ACL) 101。

等效 CLI 配置
crypto ipsec transform-set myset esp-des esp-md5-hmac

单击 Ok。

注意： 这是等同CLI配置：

等效 CLI 配置
access-list 101 permit ip 10.5.5.0 0.0.0.255 192.168.1.0 0.0.0.255

在创建cryto地图mymap的奥得河选择配置> VPN > VPN组件> IPSec > IPSec策略>Add如此镜像所显示。

单击 Add。

点击常规选项卡并且保留默认设置。
点击对等体信息选项卡为了添加对端IP地址172.16.1.2。
点击转换集选项卡为了选择希望的转换集合myset。
点击IPSec规则选项卡为了选择现有crypto ACL 101。

单击 Ok。

注意： 这是等同CLI配置：

等效 CLI 配置
crypto map mymap 10 ipsec-isakmp set peer 172.16.1.2 set transform-set myset match address 101

选择配置> VPN >站点到站点VPN > Edit站点到站点VPN >Add为了应用加密映射mymap到接口Ethernet0/0。
单击 Ok。

注意： 这是等同CLI配置：
等效 CLI 配置
interface Ethernet0/0 crypto map mymap

等效 CLI 配置
interface Ethernet0/0 crypto map mymap

Site_A路由器CLI配置

Site_A路由器
Site_A#show running-config Sep 25 21:15:58.954: %SYS-5-CONFIG_I: Configured from console by console Building configuration... Current configuration : 1545 bytes ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Site_A ! boot-start-marker boot-end-marker ! ! no aaa new-model ! resource policy ! ! ! ip cef ! ! crypto isakmp policy 10 hash md5 authentication pre-share* !--- Defines ISAKMP policy. crypto isakmp key 6 L2L12345 address 172.16.1.2 255.255.255.0 !--- Defines pre-shared secret used for IKE authentication ! ! crypto ipsec transform-set myset esp-des esp-md5-hmac !--- Defines IPSec encryption and authentication algorithms. ! crypto map mymap 10 ipsec-isakmp set peer 172.16.1.2 set transform-set myset match address 101 !--- Defines crypto map. ! ! ! ! interface Loopback0 ip address 192.168.1.1 255.255.255.0 ip nat inside ip virtual-reassembly ! interface Ethernet0/0 ip address 10.1.1.2 255.255.255.0 ip nat outside ip virtual-reassembly half-duplex crypto map mymap !--- Apply crypto map on the outside interface. ! ! !--- Output Suppressed ! ip http server no ip http secure-server ! ip route 0.0.0.0 0.0.0.0 10.1.1.1 ! ip nat inside source static network 192.168.1.0 10.5.5.0 /24 !--- Static translation defined to translate Private_LAN1 !--- from 192.168.1.0/24 to 10.5.5.0/24. !--- Note that this translation is used for both !--- VPN and Internet traffic from Private_LAN1. !--- A routable global IP address range, or an extra NAT !--- at the ISP router (in front of Site_A router), is !--- required if Private_LAN1 also needs internal access. ip nat outside source static network 192.168.1.0 10.10.10.0 /24 !--- Static translation defined to translate Private_LAN2 !--- from 192.168.1.0/24 to 10.10.10.0/24. ! access-list 101 permit ip 10.5.5.0 0.0.0.255 192.168.1.0 0.0.0.255 !--- Defines IPSec interesting traffic. !--- Note that the host behind Site_A router communicates !--- to Private_LAN2 using 10.10.10.0/24. !--- When the packets arrive at the Site_A router, they are first !--- translated to 192.168.1.0/24 and then encrypted by IPSec. ! ! control-plane ! ! line con 0 line aux 0 line vty 0 4 ! ! end Site_A#

Site_A路由器

Site_A#show running-config
*Sep 25 21:15:58.954: %SYS-5-CONFIG_I: Configured from console by console
Building configuration...

Current configuration : 1545 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Site_A
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
!
resource policy
!
!
!
ip cef
!
!
crypto isakmp policy 10
 hash md5
 authentication pre-share

!--- Defines ISAKMP policy.


crypto isakmp key 6 L2L12345 address 172.16.1.2 255.255.255.0


!--- Defines pre-shared secret used for IKE authentication

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

!--- Defines IPSec encryption and authentication algorithms.

!
crypto map mymap 10 ipsec-isakmp
 set peer 172.16.1.2
 set transform-set myset
 match address 101

!--- Defines crypto map.

!
!
!
!
interface Loopback0
 ip address 192.168.1.1 255.255.255.0
 ip nat inside
 ip virtual-reassembly
!
interface Ethernet0/0
 ip address 10.1.1.2 255.255.255.0
 ip nat outside
 ip virtual-reassembly
 half-duplex
 crypto map mymap

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

!
!

!--- Output Suppressed

!
ip http server
no ip http secure-server
!
ip route 0.0.0.0 0.0.0.0 10.1.1.1
!
ip nat inside source static network 192.168.1.0 10.5.5.0 /24


!--- Static translation defined to translate Private_LAN1 !--- from 192.168.1.0/24 to 10.5.5.0/24. !--- Note that this translation is used for both !--- VPN and Internet traffic from Private_LAN1. !--- A routable global IP address range, or an extra NAT !--- at the ISP router (in front of Site_A router), is !--- required if Private_LAN1 also needs internal access.


ip nat outside source static network 192.168.1.0 10.10.10.0 /24


!--- Static translation defined to translate Private_LAN2 !--- from 192.168.1.0/24 to 10.10.10.0/24.

!
access-list 101 permit ip 10.5.5.0 0.0.0.255 192.168.1.0 0.0.0.255


!--- Defines IPSec interesting traffic. !--- Note that the host behind Site_A router communicates !--- to Private_LAN2 using 10.10.10.0/24. !--- When the packets arrive at the Site_A router, they are first !--- translated to 192.168.1.0/24 and then encrypted by IPSec.

!
!
control-plane
!
!
line con 0
line aux 0
line vty 0 4
!
!
end
Site_A#

Site_B路由器CLI配置

Site_B路由器
Site_B#show running_config Building configuration... Current configuration : 939 bytes ! version 12.2 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname Site_B ! ! ip subnet-zero ! ! crypto isakmp policy 10 hash md5 authentication pre-share crypto isakmp key L2L12345 address 10.1.1.2 255.255.255.0 ! ! crypto ipsec transform-set myset esp-des esp-md5-hmac ! crypto map mymap 10 ipsec-isakmp set peer 10.1.1.2 set transform-set myset match address 101 ! ! ! ! interface Ethernet0 ip address 192.168.1.1 255.255.255.0 ! interface Ethernet1 ip address 172.16.1.2 255.255.255.0 crypto map mymap ! !--- Output Suppressed ! ip classless ip route 0.0.0.0 0.0.0.0 172.16.1.1 ip http server ! access-list 101 permit ip 192.168.1.0 0.0.0.255 10.5.5.0 0.0.0.255 ! line con 0 line aux 0 line vty 0 4 ! end Site_B#

Site_B路由器

Site_B#show running_config
Building configuration...

Current configuration : 939 bytes
!
version 12.2
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Site_B
!
!
ip subnet-zero
!
!
crypto isakmp policy 10
 hash md5
 authentication pre-share
crypto isakmp key L2L12345 address 10.1.1.2 255.255.255.0
!
!
crypto ipsec transform-set myset esp-des esp-md5-hmac
!
crypto map mymap 10 ipsec-isakmp
 set peer 10.1.1.2
 set transform-set myset
 match address 101
!
!
!
!
interface Ethernet0
 ip address 192.168.1.1 255.255.255.0
!
interface Ethernet1
 ip address 172.16.1.2 255.255.255.0
 crypto map mymap
!

!--- Output Suppressed

!
ip classless
ip route 0.0.0.0 0.0.0.0 172.16.1.1
ip http server
!
access-list 101 permit ip 192.168.1.0 0.0.0.255 10.5.5.0 0.0.0.255
!
line con 0
line aux 0
line vty 0 4
!
end

Site_B#

验证

本部分所提供的信息可用于确认您的配置是否正常工作。

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。

show crypto isakmp sa -显示所有当前在对等端的互联网密钥交换(IKE)安全关联(SAs)。

Site_A#show crypto isakmp sa
dst             src             state          conn-id slot status
172.16.1.2      10.1.1.2        QM_IDLE              1    0 ACTIVE

show crypto isakmp sa详细信息—显示所有当前IKE SAS详细信息在对等体。

Site_A#show cryto isakmp sa detail
Codes: C - IKE configuration mode, D - Dead Peer Detection
       K - Keepalives, N - NAT-traversal
       X - IKE Extended Authentication
       psk - Preshared key, rsig - RSA signature
       renc - RSA encryption

C-id  Local           Remote          I-VRF    Status Encr Hash Auth DH Lifetime
 Cap.
1     10.1.1.2        172.16.1.2               ACTIVE des  md5  psk  1  23:59:42

       Connection-id:Engine-id =  1:1(software)

show crypto ipsec sa - 显示当前 SA 使用的设置。

Site_A#show crypto ipsec sa

interface: Ethernet0/0
    Crypto map tag: mymap, local addr 10.1.1.2

   protected vrf: (none)
   local  ident (addr/mask/prot/port): (10.5.5.0/255.255.255.0/0/0)
   remote ident (addr/mask/prot/port): (192.168.1.0/255.255.255.0/0/0)
   current_peer 172.16.1.2 port 500
     PERMIT, flags={origin_is_acl,}
    #pkts encaps: 2, #pkts encrypt: 2, #pkts digest: 2
    #pkts decaps: 2, #pkts decrypt: 2, #pkts verify: 2
    #pkts compressed: 0, #pkts decompressed: 0
    #pkts not compressed: 0, #pkts compr. failed: 0
    #pkts not decompressed: 0, #pkts decompress failed: 0
    #send errors 3, #recv errors 0

     local crypto endpt.: 10.1.1.2, remote crypto endpt.: 172.16.1.2
     path mtu 1500, ip mtu 1500, ip mtu idb Ethernet0/0
     current outbound spi: 0x1A9CDC0A(446487562)

     inbound esp sas:
      spi: 0x99C7BA58(2580003416)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Tunnel, }
        conn id: 2002, flow_id: SW:2, crypto map: mymap
        sa timing: remaining key lifetime (k/sec): (4478520/3336)
        IV size: 8 bytes
        replay detection support: Y
        Status: ACTIVE

     inbound ah sas:

     inbound pcp sas:

     outbound esp sas:
      spi: 0x1A9CDC0A(446487562)
        transform: esp-des esp-md5-hmac ,
        in use settings ={Tunnel, }
        conn id: 2001, flow_id: SW:1, crypto map: mymap
        sa timing: remaining key lifetime (k/sec): (4478520/3335)
        IV size: 8 bytes
        replay detection support: Y
        Status: ACTIVE

     outbound ah sas:

     outbound pcp sas:
Site_A#

show ip nat translations —显示转换插槽信息。

Site_A#show ip nat translations
Pro Inside global      Inside local       Outside local      Outside global
--- ---                ---                10.10.10.1         192.168.1.1
--- ---                ---                10.10.10.0         192.168.1.0
--- 10.5.5.1           192.168.1.1        ---                ---
--- 10.5.5.0           192.168.1.0        ---                ---

show ip nat statistics —显示关于转换的静态信息。

Site_A#show ip nat statistics
Total active translations: 4 (2 static, 2 dynamic; 0 extended)
Outside interfaces:
  Ethernet0/0
Inside interfaces:
  Loopback0
Hits: 42  Misses: 2
CEF Translated packets: 13, CEF Punted packets: 0
Expired translations: 7
Dynamic mappings:
Queued Packets: 0
Site_A#

完成这些步骤为了验证连接：
1. 在SDM，请选择Tools> Ping为了设立有来源IP作为192.168.1.1和目的地IP的IPSec VPN通道作为10.10.10.1。
2. 如此镜像所显示，点击测验通道为了检查IPSec VPN通道设立。
3. 单击开始。

故障排除

本部分提供的信息可用于对配置进行故障排除。

Site_A#debug ip packet
IP packet debugging is on
Site_A#ping
Protocol [ip]:
Target IP address: 10.10.10.1
Repeat count [5]:
Datagram size [100]:
Timeout in seconds [2]:
Extended commands [n]: y
Source address or interface: 192.168.1.1
Type of service [0]:
Set DF bit in IP header? [no]:
Validate reply data? [no]:
Data pattern [0xABCD]:
Loose, Strict, Record, Timestamp, Verbose[none]:
Sweep range of sizes [n]:
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.1, timeout is 2 seconds:
Packet sent with a source address of 192.168.1.1
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 40/45/52 ms
Site_A#
*Sep 30 18:08:10.601: IP: tableid=0, s=192.168.1.1 (local), d=10.10.10.1 (Ethern
et0/0), routed via FIB
*Sep 30 18:08:10.601: IP: s=192.168.1.1 (local), d=10.10.10.1 (Ethernet0/0), len
 100, sending
*Sep 30 18:08:10.641: IP: tableid=0, s=10.10.10.1 (Ethernet0/0), d=192.168.1.1 (
Loopback0), routed via RIB
*Sep 30 18:08:10.641: IP: s=10.10.10.1 (Ethernet0/0), d=192.168.1.1, len 100, rc
vd 4
*Sep 30 18:08:10.645: IP: tableid=0, s=192.168.1.1 (local), d=10.10.10.1 (Ethern
et0/0), routed via FIB
*Sep 30 18:08:10.645: IP: s=192.168.1.1 (local), d=10.10.10.1 (Ethernet0/0), len
 100, sending
*Sep 30 18:08:10.685: IP: tableid=0, s=10.10.10.1 (Ethernet0/0), d=192.168.1.1 (
Loopback0), routed via RIB
*Sep 30 18:08:10.685: IP: s=10.10.10.1 (Ethernet0/0), d=192.168.1.1, len 100, rc
vd 4
*Sep 30 18:08:10.685: IP: tableid=0, s=192.168.1.1 (local), d=10.10.10.1 (Ethern
et0/0), routed via FIB
*Sep 30 18:08:10.689: IP: s=192.168.1.1 (local), d=10.10.10.1 (Ethernet0/0), len
 100, sending
*Sep 30 18:08:10.729: IP: tableid=0, s=10.10.10.1 (Ethernet0/0), d=192.168.1.1 (
Loopback0), routed via RIB
*Sep 30 18:08:10.729: IP: s=10.10.10.1 (Ethernet0/0), d=192.168.1.1, len 100, rc
vd 4
*Sep 30 18:08:10.729: IP: tableid=0, s=192.168.1.1 (local), d=10.10.10.1 (Ethern
et0/0), routed via FIB
*Sep 30 18:08:10.729: IP: s=192.168.1.1 (local), d=10.10.10.1 (Ethernet0/0), len
 100, sending
*Sep 30 18:08:10.769: IP: tableid=0, s=10.10.10.1 (Ethernet0/0), d=192.168.1.1 (
Loopback0), routed via RIB
*Sep 30 18:08:10.769: IP: s=10.10.10.1 (Ethernet0/0), d=192.168.1.1, len 100, rc
vd 4
*Sep 30 18:08:10.773: IP: tableid=0, s=192.168.1.1 (local), d=10.10.10.1 (Ethern
et0/0), routed via FIB
*Sep 30 18:08:10.773: IP: s=192.168.1.1 (local), d=10.10.10.1 (Ethernet0/0), len
 100, sending
*Sep 30 18:08:10.813: IP: tableid=0, s=10.10.10.1 (Ethernet0/0), d=192.168.1.1 (
Loopback0), routed via RIB
*Sep 30 18:08:10.813: IP: s=10.10.10.1 (Ethernet0/0), d=192.168.1.1, len 100, rc
vd 4

在两个有叠加专用网络的IOS路由器之间的IPSec配置示例

下载选项

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

Site_A路由器SDM配置

Site_A路由器CLI配置

Site_B路由器CLI配置

验证

故障排除

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