linux 静态nat配置,NAT静态和端口映射配置实验

一、静态NAT配置图

e552d272b4ffaf70e92a25632743e2fa.png

1、配置主机地址:

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 : 13.0.0.13 255.255.255.0 gateway 13.0.0.1

2、配置R1路由

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)#int f0/1

R1(config-if)#ip add 12.0.0.1 255.255.255.0

R1(config-if)#no shut

3、关闭sw路由功能

no ip routing

4、配置主机地址

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

5、互联互通测试

PC1> ping 192.168.100.20

84 bytes from 192.168.100.20 icmp_seq=1 ttl=64 time=0.000 ms

84 bytes from 192.168.100.20 icmp_seq=2 ttl=64 time=0.000 ms

84 bytes from 192.168.100.20 icmp_seq=3 ttl=64 time=0.000 ms

84 bytes from 192.168.100.20 icmp_seq=4 ttl=64 time=0.000 ms

84 bytes from 192.168.100.20 icmp_seq=5 ttl=64 time=0.000 ms

PC1> ping 12.0.0.12

13.0.0.13 icmp_seq=1 timeout

13.0.0.13 icmp_seq=2 timeout

84 bytes from 12.0.0.12 icmp_seq=3 ttl=62 time=62.485 ms

84 bytes from 12.0.0.12 icmp_seq=4 ttl=62 time=69.039 ms

84 bytes from 12.0.0.12 icmp_seq=5 ttl=62 time=69.046 ms

6、配置静态NAT列表

R1(config)#ip nat inside source static 192.168.100.10 12.0.0.10

R1(config)#ip nat inside source static 192.168.100.20 12.0.0.20

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

R1#debug ip nat

IP NAT debugging is on

7、测试连通性

PC1> ping 12.0.0.12

13.0.0.13 icmp_seq=1 timeout

13.0.0.13 icmp_seq=2 timeout

84 bytes from 12.0.0.12 icmp_seq=3 ttl=62 time=84.698 ms

84 bytes from 12.0.0.12 icmp_seq=4 ttl=62 time=85.265 ms

84 bytes from 12.0.0.12 icmp_seq=5 ttl=62 time=69.205 ms

*Mar 1 00:23:50.619: NAT*: s=192.168.100.10 -> 12.0.0.10,d=12.0.0.12[5464]

*Mar 1 00:23:51.831: NAT*: s=192.168.100.10->12.0.0.10, d=12.0.0.12 [5465]

#将目标地址12.0.0.10转换成192.168.100.10,这个就是静态地址转换的过程

二、NAT静态端口映射配置

1、实验环境

Linux搭建的一台Web服务器,局域网地址为192.168.100.100,默认端口号80。局域网的网关192.168.100.1,映射地址:192.168.100.100:80—>12.0.0.100:8080。

别人只能看到公网IP地址,私网地址不能被直接访问。

2、实验目的

广域网的客户机无法直接访问100.100地址,如果想访问的话就需要做端口映射。

3、实验图

044b6e9aec1959719da8bc3ae8d8b070.png

4、在Linux中安装httpd的服务软件包,并开启httpd服务,写测试网页等

[root@localhost ~]# yum install httpd -y

[root@localhost ~]# vim /var/www/html/index.html //写测试网页

this is inside web

[root@localhost ~]# systemctl start httpd

[root@localhost ~]# systemctl stop firewalld.service

[root@localhost ~]# setenforce 0

5、配置网关地址

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)#ex

R1(config)#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

6、通过centos中的浏览器可看到测试页面(ping 192.168.100.100或127.0.0.1都行)

8af388c055158f9da91d4ba5f1f2d424.png

7、给Linux绑定VMnet1网卡,给Host绑定VMnet2网卡,配置静态地址

8、访问对方192.168.100.100,此时是可以访问的,但是真实情况下是无法直接访问对方私有地址的

83a908fcbd0caa17132357eaebb67862.png

9、静态端口映射配置

R1(config)# ip nat inside source static tcp 192.168.100.100 80 12.0.0.100 8080 extendable

R1(config)#int f0/0

R1(config-if)#ip nat inside

R1(config-if)#int f0/1

R1(config-if)#ip nat outsid

R1(config-if)#end

R1#debug ip nat

IP NAT debugging is on

*Mar 1 00:36:59.327: NAT*: TCP s=49160, d=8080->80

*Mar 1 00:36:59.327: NAT*: s=12.0.0.12, d=12.0.0.100->192.168.100.100 [364]

# 端口和地址都进行了转换

10、再次尝试使用公网地址在win7进行访问,此时可以成功,实验成功!

7418e7f3c56e7af643745f3740b21859.png