pat

基于端口的NAT

 

Router 0：
Router>enable
Router#configure terminal
Router(config)#interface fastEthernet 0/0
Router(config-if)#ip address 192.168.1.1 255.255.255.0
Router(config-if)#no shutdown
Router(config)#interface fastEthernet 0/1
Router(config-if)#ip address 192.168.2.1 255.255.255.0
Router(config-if)#no shutdown
Router(config-if)#ip route 0.0.0.0 0.0.0.0 fastEther 0/1
Router(config)#access-list 1 permit any
Router(config)#ip nat inside source list 1 interface fastEthernet 0/1 overload
Router(config)#interface fastEthernet 0/1
Router(config-if)#ip nat outside
Router(config-if)#interface fastEthernet 0/0
Router(config-if)#ip nat inside
 

Router 1：
Router>enable
Router#configure terminal
Router(config)#interface fastEthernet 0/0
Router(config-if)#ip address 192.168.2.2 255.255.255.0
Router(config-if)#no shutdown
Router(config-if)#exit
Router(config)#interface fastEthernet 0/1
Router(config-if)#ip address 192.168.3.1 255.255.255.0
Router(config-if)#no shutdown

 

 

 

 

 

 

PAT（多对一）

#access-list 1 permit any(标准型控制列表1准许所有通过)
#ip nat inside source list 1 infterface fastEthernet 0/1 overload(设置PAT+过载设置)
#ip route 0.0.0.0 0.0.0.0 f0/1(设置为默认路由器)
#in f0/0
#ip nat inside(设置f0/0为内网)
#in f0/1
#ip nat outside(设置f0/1为外网)