1）将内部地址10.1.1.11/24的80端口静态转换为公网地址200.1.1.11/28的80端口，以便被外网（Client2）访问；同时Server1和Client2可以互相ping通。

2）将内部地址10.1.1.12/24的21端口静态转换为公网地址200.1.1.12/28的21端口，以便被外网（Client2）访问。
搭建实验环境

实现此案例需要按照如下步骤进行。

int g0/0/1 
  nat server protocol tcp global 200.1.1.12 21 inside 10.1.1.12 21
  nat server protocol tcp global 200.1.1.11 80 inside 10.1.1.11 80

    
    

    
    
1
2
3

5）增加配置使Client2 ping通Server1

int g0/0/1 
  nat server protocol icmp global 200.1.1.11 inside 10.1.1.11

    
    

    
    
1
2

Server1也可以ping通Client2。

在路由器G0/0/1口抓包，源地址已做转换，如图 所示

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