标签:全局 access NAT网络地址转换 code add ip add 复用 net 应用
动态NAT地址转换sw#conf t
sw(config)#no ip routing //关闭路由功能
sw(config)#int f1/0
sw(config-if)#speed 100 //配置速率
sw(config-if)#dup full //配置全双工模式
R1#conf t ##全局模式
R1(config)#int f0/0 ##进入接口
R1(config-if)#ip add 192.168.100.1 255.255.255.0 ##配置接口的地址网关
R1(config-if)#no shut ##开启
R1(config-if)#int f0/1
R1(config-if)#ip add 12.0.0.1 255.255.255.0
R1(config-if)#no shut
R1(config-if)#ex
R1(config)#access-list 1 permit 192.168.100.0 0.0.0.255 //设定内部地址转化范围
R1(config)#ip nat pool test 12.0.0.10 12.0.0.100 netmask 255.255.255.0 ////设定外部地址转化范围
R1(config)#ip nat inside source list 1 pool test //调用ip地址池
R1(config)#int f0/0
R1(config-if)#ip nat inside //将NAT应用于内部端口
R1(config-if)#int f0/1
R1(config-if)#ip nat outside //将NAT应用于外部端口
R1(config-if)#end
PC1> ip 192.168.100.10 192.168.100.1 ##配置pc1的ip地址
Checking for duplicate address...
PC1 : 192.168.100.10 255.255.255.0 gateway 192.168.100.1
PC2> ip 192.168.100.20 192.168.100.1
Checking for duplicate address...
PC1 : 192.168.100.20 255.255.255.0 gateway 192.168.100.1
PC3> ip 12.0.0.12 12.0.0.1
Checking for duplicate address...
PC1 : 12.0.0.12 255.255.255.0 gateway 12.0.0.1
测试全网互通性
PC1> ping 12.0.0.12
84 bytes from 12.0.0.12 icmp_seq=1 ttl=63 time=31.244 ms
84 bytes from 12.0.0.12 icmp_seq=2 ttl=63 time=31.282 ms
84 bytes from 12.0.0.12 icmp_seq=3 ttl=63 time=46.897 ms
84 bytes from 12.0.0.12 icmp_seq=4 ttl=63 time=46.834 ms
84 bytes from 12.0.0.12 icmp_seq=5 ttl=63 time=31.210 ms
PC2> ping 12.0.0.12
84 bytes from 12.0.0.12 icmp_seq=1 ttl=63 time=46.864 ms
84 bytes from 12.0.0.12 icmp_seq=2 ttl=63 time=46.864 ms
84 bytes from 12.0.0.12 icmp_seq=3 ttl=63 time=31.242 ms
84 bytes from 12.0.0.12 icmp_seq=4 ttl=63 time=31.273 ms
84 bytes from 12.0.0.12 icmp_seq=5 ttl=63 time=31.208 ms
debug功能查看地址转换的过程
R1#debug ip nat
IP NAT debugging is on
R1#
*Mar 1 00:15:21.287: NAT*: s=192.168.100.10->12.0.0.10, d=12.0.0.12 [55463]
*Mar 1 00:15:21.295: NAT*: s=12.0.0.12, d=12.0.0.10->192.168.100.10 [55463]
//PC1 地址转换成功
R1#
*Mar 1 00:19:12.139: NAT*: s=192.168.100.20->12.0.0.11, d=12.0.0.12 [55693]
*Mar 1 00:19:12.159: NAT*: s=12.0.0.12, d=12.0.0.11->192.168.100.20 [55693]
//PC2 地址转换成功
sw#conf t
sw(config)#no ip routing //关闭路由功能
sw(config)#int f1/0
sw(config-if)#speed 100 //配置速率
sw(config-if)#dup full //配置全双工模式
sw(config-if)#ex
R1#conf t
R1(config)#int f0/0
R1(config-if)#ip add 192.168.100.1 255.255.255.0
R1(config-if)#no shut
R1(config-if)#int f0/1
R1(config-if)#ip add 12.0.0.1 255.255.255.0
R1(config-if)#no shut
R1(config-if)#ex
R1(config)#access-list 1 permit 192.168.100.0 0.0.0.255
//定义内部访问列表
R1(config)#ip nat inside source list 1 interface fastEthernet 0/1 overload
//设置复用动态IP地址转换于外部接口
R1(config)#int f0/0
R1(config-if)#ip nat inside
R1(config-if)#int f0/1
R1(config-if)#ip nat outside
R1(config-if)#end
PC1> ip 192.168.100.10 192.168.100.1
Checking for duplicate address...
PC1 : 192.168.100.10 255.255.255.0 gateway 192.168.100.1
PC2> ip 192.168.100.20 192.168.100.1
Checking for duplicate address...
PC1 : 192.168.100.20 255.255.255.0 gateway 192.168.100.1
PC3> ip 12.0.0.12 12.0.0.1
Checking for duplicate address...
PC1 : 12.0.0.12 255.255.255.0 gateway 12.0.0.1
PC1> ping 12.0.0.12
84 bytes from 12.0.0.12 icmp_seq=1 ttl=63 time=31.242 ms
84 bytes from 12.0.0.12 icmp_seq=2 ttl=63 time=46.864 ms
84 bytes from 12.0.0.12 icmp_seq=3 ttl=63 time=31.280 ms
84 bytes from 12.0.0.12 icmp_seq=4 ttl=63 time=31.241 ms
84 bytes from 12.0.0.12 icmp_seq=5 ttl=63 time=31.241 ms
R1#debug ip nat
IP NAT debugging is on
R1#
*Mar 1 00:32:57.215: NAT*: s=192.168.100.10->12.0.0.1, d=12.0.0.12 [59174]
*Mar 1 00:32:57.219: NAT*: s=12.0.0.12, d=12.0.0.1->192.168.100.10 [59174]
...
//私网地址192.168.100.10已转换成功公网地址12.0.0.1,并接收到来自公网主机的回复信息
PC2> ping 12.0.0.12
84 bytes from 12.0.0.12 icmp_seq=1 ttl=63 time=31.242 ms
84 bytes from 12.0.0.12 icmp_seq=2 ttl=63 time=31.245 ms
84 bytes from 12.0.0.12 icmp_seq=3 ttl=63 time=31.244 ms
84 bytes from 12.0.0.12 icmp_seq=4 ttl=63 time=31.213 ms
84 bytes from 12.0.0.12 icmp_seq=5 ttl=63 time=31.246 ms
R1#
*Mar 1 00:35:15.595: NAT*: s=192.168.100.20->12.0.0.1, d=12.0.0.12 [59312]
*Mar 1 00:35:15.607: NAT*: s=12.0.0.12, d=12.0.0.1->192.168.100.20 [59312]
...
////私网地址192.168.100.20已转换成功公网地址12.0.0.1,并接收到来自公网主机的回复信息
NAT网络地址转换——动态地址转换,PAT端口多路复用(实操!!)
标签:全局 access NAT网络地址转换 code add ip add 复用 net 应用
原文地址:https://blog.51cto.com/14080162/2444278