| R1： no ip routing（不做路由协议了，可以把R1看成是一台电脑） interface Serial0 ip address 192.168.10.1 255.255.255.0 ip default-gateway 192.168.10.5 【NAT配置实例】 R2: interface Serial0 ip address 192.168.10.5 255.255.255.0 ip nat inside（定义内部端口） clockrate 64000 interface Serial1 ip address 23.1.1.2 255.255.255.0 ip nat outside（定义外部端口） clockrate 64000 ip nat pool ABC 23.1.1.2 23.1.1.2 netmask 255.255.255.0（告诉路由器外网地址范围） access-list 1 permit 192.168.10.0 0.0.0.255（告诉路由器内网地址范围） ip nat inside source list 1 pool ABC overload（将内网地址和外网地址做转换）（注意：“overload”，其转换方式是复用动态地址转换） ip route 0.0.0.0 0.0.0.0 23.1.1.3（做默认路由指向外网） R3: interface Loopback1 ip address 2.2.2.2 255.0.0.0 interface Serial1 ip address 23.1.1.3 255.255.255.0 R1#ping 2.2.2.2 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 64/65/72 ms R2#sh ip nat trans Pro Inside globalInside localOutside localOutside global icmp 23.1.1.2:3896192.168.10.1:38962.2.2.2:38962.2.2.2:3896 icmp 23.1.1.2:3897192.168.10.1:38972.2.2.2:38972.2.2.2:3897 icmp 23.1.1.2:3898192.168.10.1:38982.2.2.2:38982.2.2.2:3898 icmp 23.1.1.2:3899192.168.10.1:38992.2.2.2:38992.2.2.2:3899 icmp 23.1.1.2:3900192.168.10.1:39002.2.2.2:39002.2.2.2:3900 出自 51CTO.COM博客 |
