配置 Cisco 827 上带VPN IPSec NAT 超载的PPPoE

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亲筵袁
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1 配置 Cisco 827 上带 VPN IPSec NAT 超载的 PPPoE 目录简介开始使用前规则先决条件使用的组件配置网络图配置验证故障排除故障排除命令相关信息简介 Cisco 827 路由器通常是 DSL 客户端前置设备 (CPE) 在此示例配置中, 思科 827 配置用于以太网点对点协议 (PPPoE 的 ), 用作使用思科 3600 路由器的 LAN-to-LAN IPSec 隧道中的对端 Cisco 827 还会执行网络地址转换 (NAT) 过载以便为其内部网络提供 Internet 连接开始使用前规则有关文档规则的详细信息, 请参阅 Cisco 技术提示规则先决条件当考虑此配置时, 请牢记下列各项为 Cisco 827 中的 IPSec VPN 添加配置之前, 确保 PPPoe 正在运行要在 Cisco 827 上调试 PPPoE 客户端, 必须考虑协议堆栈应按以下顺序排除故障 DSL 物理层 ATM 层以太网层 PPP 层在此示例配置中,Cisco 827 具有一个静态 IP 地址如果您的 Cisco 827 具有一个动态 IP 地址, 请参阅通过 NAT 配置路由器间动态到静态 IPSec 以及本文使用的组件

本文档中的信息基于以下软件和硬件版本 Cisco 827 12.1(5)YB4 Cisco 3600 12.1(5)T8 Cisco 6400 12.

2 本文档中的信息基于以下软件和硬件版本 Cisco (5)YB4 Cisco (5)T8 Cisco (1)DC1 本文档中的信息都是基于特定实验室环境中的设备创建的本文档中使用的所有设备最初均采用原始 ( 默认 ) 配置如果您是在真实网络上操作, 请确保您在使用任何命令前已经了解其潜在影响配置本部分提供有关如何配置本文档所述功能的信息网络图本文档使用下图所示的网络设置配置本文档使用如下所示的配置 Cisco 827 (CPE) 路由器灯注意 : 要查找本文档所用命令的其他信息, 请使用命令查找工具 ( 仅限注册用户 ) Cisco 827 (CPE) version 12.1 no service single-slot-reload-enable no service pad service timestamps debug uptime service timestamps log uptime no service password-encryption hostname 827 logging rate-limit console 10 except errors ip subnet-zero

3 no ip finger no ip dhcp-client network-discovery vpdn enable no vpdn logging vpdn-group pppoe request-dialin protocol pppoe crypto isakmp policy 20 encr 3des authentication pre-share group 2 crypto isakmp key sharedkey address crypto ipsec transform-set dsltest esp-3des esp-md5-hmac crypto map test 10 ipsec-isakmp set peer set transform-set dsltest match address 101 interface Ethernet0 ip address ip nat inside interface ATM0 no ip address no atm ilmi-keepalive bundle-enable dsl operating-mode ansi-dmt interface ATM0.1 point-to-point pvc 0/ This is usually provided by the ISP. protocol pppoe pppoe-client dial-pool-number 1 interface Dialer1 ip address This is provided by the ISP. --- Another variation is ip address negotiated. ip mtu 1492 ip Nat outside encapsulation ppp no ip route-cache no ip mroute-cache dialer pool 1 ppp authentication chap callin ppp chap hostname testuser ppp chap password A A545C crypto map test ip classless ip route Dialer1 no ip http server ip Nat inside source route-map nonat interface Dialer1 overload access-list 1 permit access-list 101 permit ip

4 access-list 105 deny ip access-list 105 permit ip any route-map nonat permit 10 match ip address 105 line con 0 transport input none stopbits 1 line vty 0 4 login scheduler max-task-time 5000 end 路由器灯 version 12.1 no service single-slot-reload-enable no service pad service timestamps debug uptime service timestamps log uptime no service password-encryption hostname 827 logging rate-limit console 10 except errors ip subnet-zero no ip finger no ip dhcp-client network-discovery vpdn enable no vpdn logging vpdn-group pppoe request-dialin protocol pppoe crypto isakmp policy 20 encr 3des authentication pre-share group 2 crypto isakmp key sharedkey address crypto ipsec transform-set dsltest esp-3des esp-md5-hmac crypto map test 10 ipsec-isakmp set peer set transform-set dsltest match address 101 interface Ethernet0 ip address ip nat inside

5 interface ATM0 no ip address no atm ilmi-keepalive bundle-enable dsl operating-mode ansi-dmt interface ATM0.1 point-to-point pvc 0/ This is usually provided by the ISP. protocol pppoe pppoe-client dial-pool-number 1 interface Dialer1 ip address This is provided by the ISP. --- Another variation is ip address negotiated. ip mtu 1492 ip Nat outside encapsulation ppp no ip route-cache no ip mroute-cache dialer pool 1 ppp authentication chap callin ppp chap hostname testuser ppp chap password A A545C crypto map test ip classless ip route Dialer1 no ip http server ip Nat inside source route-map nonat interface Dialer1 overload access-list 1 permit access-list 101 permit ip access-list 105 deny ip access-list 105 permit ip any route-map nonat permit 10 match ip address 105 line con 0 transport input none stopbits 1 line vty 0 4 login scheduler max-task-time 5000 end 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 命令输出的分析注意 : 要正确地了解以下 show 命令显示了什么, 请参见 IP 安全故障排除 - 了解和使用 debug 命令

6 show crypto isakmp sa - 显示对等体之间建立的 Internet 安全关联管理协议 (ISAKMP) 安全关联 (SA) show crypto ipsec sa - 显示对等体之间建立的 IPSec SA show crypto engine connections active - 显示已建立的每个阶段 2 SA 和已发送的流量 Router IPSec Good show 命令 show crypto isakmp sacisco 827 (CPE) 路由器灯 show crypto engine connections activecisco 827 (CPE) 路由器灯 show crypto ipsec sa 827#show crypto ipsec sa interface: Dialer1 Crypto map tag: test, local addr local ident (addr/mask/prot/port): ( / /0/0) remote ident (addr/mask/prot/port): ( / /0/0) current_peer: PERMIT, flags={origin_is_acl,} #pkts encaps: 208, #pkts encrypt: 208, #pkts digest 208 #pkts decaps: 208, #pkts decrypt: 208, #pkts verify 208 #pkts compressed: 0, #pkts decompressed: 0 #pkts not compressed: 0, #pkts compr. failed: 0, #pkts decompress failed: 0 #send errors 2, #recv errors 0 local crypto endpt.: , remote crypto endpt.: path mtu 1500, media mtu 1500 current outbound spi: 4FE59EF2 inbound esp sas: spi: 0x3491ACD6( ) transform: esp-3des esp-md5-hmac, in use settings ={Tunnel, } slot: 0, conn id: 2000, flow_id: 1, crypto map: test sa timing: remaining key lifetime (k/sec): ( /3301) IV size: 8 bytes replay detection support: Y inbound ah sas: inbound pcp sas: outbound esp sas: spi: 0x4FE59EF2( ) transform: esp-3des esp-md5-hmac, in use settings ={Tunnel, } slot: 0, conn id: 2001, flow_id: 2, crypto map: test sa timing: remaining key lifetime (k/sec): ( /3301) IV size: 8 bytes replay detection support: Y outbound ah sas: outbound pcp sas: interface: Virtual-Access1 Crypto map tag: test, local addr

7 local ident (addr/mask/prot/port): ( / /0/0) remote ident (addr/mask/prot/port): ( / /0/0) current_peer: PERMIT, flags={origin_is_acl,} #pkts encaps: 208, #pkts encrypt: 208, #pkts digest 208 #pkts decaps: 208, #pkts decrypt: 208, #pkts verify 208 #pkts compressed: 0, #pkts decompressed: 0 #pkts not compressed: 0, #pkts compr. failed: 0, #pkts decompress failed: 0 #send errors 2, #recv errors 0 local crypto endpt.: , remote crypto endpt.: path mtu 1500, media mtu 1500 current outbound spi: 4FE59EF2 inbound esp sas: spi: 0x3491ACD6( ) transform: esp-3des esp-md5-hmac, in use settings ={Tunnel, } slot: 0, conn id: 2000, flow_id: 1, crypto map: test sa timing: remaining key lifetime (k/sec): ( /3301) IV size: 8 bytes replay detection support: Y inbound ah sas: inbound pcp sas: outbound esp sas: spi: 0x4FE59EF2( ) transform: esp-3des esp-md5-hmac, in use settings ={Tunnel, } slot: 0, conn id: 2001, flow_id: 2, crypto map: test sa timing: remaining key lifetime (k/sec): ( /3301) IV size: 8 bytes replay detection support: Y outbound ah sas: outbound pcp sas: 故障排除本部分提供的信息可用于对配置进行故障排除故障排除命令注意 : 在发出 debug 命令之前, 请参阅关于 debug 命令和 IP 安全故障排除的重要信息 - 了解和使用 debug 命令 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 debug crypto engine - 显示加密的流量 ping - 通过 VPN 隧道显示连接, 并且可与 debug and show 命令配合使用 827#ping Protocol [ip]: Target IP address: Repeat count [5]: 100

8 Datagram size [100]: 1600 Timeout in seconds [2]: Extended commands [n]: y Source address or interface: 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 100, 1600-byte ICMP Echos to , timeout is 2 seconds: Success rate is 100 percent (100/100), round-trip min/avg/max = 264/266/276 ms 相关信息 IPSec 支持页 IP 路由支持页 IPSec 加密简介 Cisco 827 路由器故障排除技术支持 - Cisco Systems

PIX 6.x ：在静态寻址IOS路由器和动态地寻址的带有NAT的PIX防火墙之间的动态IPSec配置示例

PIX 6.x ：在静态寻址IOS路由器和动态地寻址的带有NAT的PIX防火墙之间的动态IPSec配置示例 PIX 6.x : 在静态寻址 IOS 路由器和动态地寻址的带有 NAT 的 PIX 防火墙之间的动态 IPSec 配置示例 Contents Introduction Prerequisites Requirements Components Used Conventions Configure Network Diagram 配置 Verify Troubleshoot 故障排除命令 Related