修改的端口

Router#configure terminal
Enter configuration commands, one per line.End with CNTL/Z.
Router(config)#access-list 19 permit192.168.55.5
Router(config)#ip nat service list 19 ftptcp port 8021
Router(config)#ip nat service list 19 ftptcp port 21
Router(config)#end
Router#

注释 在12.2(4)T后思科引入了no-payload关键词来防止对数据包载荷的地址信息进行修改

Router#configure terminal
Enter configuration commands, one per line.End with CNTL/Z.
Router(config)#interface FastEthernet0/0
Router(config-if)#ip address 172.16.1.5255.255.255.252
Router(config-if)#ip nat outside
Router(config-if)#exit
Router(config)#interface FastEthernet0/1
Router(config-if)#ip address 192.168.1.1255.255.255.0
Router(config-if)#ip nat inside
Router(config-if)#exit
Router(config)#ip nat inside source static192.168.1.10 172.16.1.5 no-payload
Router(config)#end
Router#