思科PAT
把PC的私有地址转换成 120.1.1.100，不是R1出接口的子网段内的地址，也希望能够通信PC地址配置https://upload-images.jianshu.io/upload_images/24325874-2bf41776af6345f5.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240
server配置
https://upload-images.jianshu.io/upload_images/24325874-0a174ae423663b07.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240
R1(config)#int e0/0R1(config-if)#ip add 192.168.10.254 255.255.255.0R1(config-if)#no shutdownR1(config-if)ip nat inside把内网接口定义为内网接口
https://upload-images.jianshu.io/upload_images/24325874-6541af289b587eca.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240
R1(config-if)#int e0/1R1(config-if)#ip add 12.1.1.1 255.255.255.0R1(config-if)#no shutdownR1(config-if)ip nat outside把外网接口定义为 外网接口
https://upload-images.jianshu.io/upload_images/24325874-826e2b422b69d645.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240
ISP(config)#int e0/1ISP(config-if)#ip add 12.1.1.2 255.255.255.0ISP(config-if)#no shutdownISP(config-if)#exISP(config)#int e0/0ISP(config-if)#ip add 100.1.1.254 255.255.255.0ISP(config-if)#no shutdown
R1(config)#ip access-list standard 10启用ACL 10R1(config-std-nacl)#permit 192.168.10.0 0.0.0.255抓取IP地址
https://upload-images.jianshu.io/upload_images/24325874-12641994f2130e46.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240
启用多对一的映射机制R1(config)#ip nat pool R1 12.1.1.1 12.1.1.1 prefix-length 24创建地址池 可以为接口地址R1(config)#ip nat inside source list 10 pool R1 overload 为启用多对一的映射机制
https://upload-images.jianshu.io/upload_images/24325874-cd08712a71ae6d33.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240
测试
https://upload-images.jianshu.io/upload_images/24325874-cd2735e47def083d.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240
R1#show ip nat translations
https://upload-images.jianshu.io/upload_images/24325874-bbbca897f291a435.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240
实验完成
大佬
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