cisco NAT 的配置例子

version 12.0

service timestamps debug uptime

service timestamps log uptime

no service password-encryption

!

hostname nat-r1

!

enable secret 5 $1$FEQr$INhRecYBeCb.UqTQ3b9mY0

!

ip subnet-zero

!

 !

 !

 !

 interface Ethernet0

 ip address 172.18.150.150 255.255.0.0

 no ip directed-broadcast

 ip nat inside            /* 定义此为网络的内部端口 */

!

interface Serial0

 ip address 192.1.1.161 255.255.255.252

 no ip directed-broadcast

 ip nat outside    /*  定义此为网络的外部端口 */

 no ip mroute-cache

 no fair-queue

!

interface Serial1

 no ip address

 no ip directed-broadcast

 shutdown

!        /* 定义从ISP那里申请到的IP在企业内部的分配策阅 */

ip nat pool tech 192.1.1.100 192.1.1.120 netmask 255.255.255.0

ip nat pool deve 192.1.1.121 192.1.1.150 netmask 255.255.255.0

ip nat pool manager 192.1.1.180 192.1.1.200 netmask 255.255.255.0

ip nat pool soft-1 192.1.1.170 192.1.1.179 netmask 255.255.255.0

ip nat pool soft-2 192.1.1.151 192.1.1.159 netmask 255.255.255.0

ip nat pool temp-user 192.1.1.160 192.1.1.160 netmask 255.255.255.0

        /* 将访问列表与地址池对应，以下为动态地址转换*/

ip nat inside source list 1 pool tech

ip nat inside source list 2 pool deve

ip nat inside source list 3 pool manager

ip nat inside source list 4 pool soft-1

ip nat inside source list 5 pool soft-2

             /*   将访问列表与地址池对应，以下为复用动态地址转换*/

ip nat inside source list 6 pool temp-user overload

             /*   将访问列表与地址池对应，以下为静态地址转换*/     

ip nat inside source static 172.18.100.168 192.1.1.168

ip nat inside source static 172.18.100.169 192.1.1.169

ip classless 

ip route 0.0.0.0 0.0.0.0 Serial0       /* 设置一个缺省路由 */

!            /* 内部网访问地址表，他指出内部网络能访问外部网的地址段，

分别定义是为了对应

                     不同的地址池  */

access-list 1 permit 172.18.107.0 0.0.0.255

access-list 2 permit 172.18.101.0 0.0.0.255

access-list 3 permit 172.18.108.0 0.0.0.255

access-list 4 permit 172.18.103.0 0.0.0.255

access-list 4 permit 172.18.102.0 0.0.0.255

access-list 4 permit 172.18.104.0 0.0.0.255

access-list 5 permit 172.18.105.0 0.0.0.255

access-list 5 permit 172.18.106.0 0.0.0.255

access-list 6 permit 172.18.111.0 0.0.0.255

!

line con 0

 transport input none

line 1 16

line aux 0

line vty 0 4

 login

!

end