Lab: 8 Network Address Translation

NAT

1

2

Practice

3

If you have more than one pc, you have repeat the last command as follow:

…….ip nat inside source static 192.1.1.2 5.1.1.20

4

5

Static NATStep1. Router Conf.

Router0, fastethernet 0/0 Router(config)#interface fastethernet 0/0 Router(config-if)#ip address 192.168.1.1 255.255.255.0 Router(config-if)#no sh

Router0, fastethernet 0/1 Router(config)#interface fastethernet 0/0 Router(config-if)#ip address 192.168.50.1 255.255.255.0 Router(config-if)#no sh

Router(config)#router ripRouter(config-router)#network 192.168.1.1Router(config-router)#network 192.168.50.1Router(config-router)#do wr

Step2. Router Static NAT configuration

Router(config-if)#interface FastEthernet0/0Router(config-if)#ip nat inside

Router(config-if)#interface FastEthernet0/1Router(config-if)#ip nat outideRouter(config-if)#exitRouter(config)#ip nat inside source static 192.168.1.2 192.168.50.10 Router(config)#ip nat inside source static 192.168.1.3 192.168.50.20Router(config)#exit

6

VerifyingRouter#sh run

Now, Send MSG from PC0 to PC3.Catch the MSG on router.

What do you notice?

Overload NAT

*** Delete NAT***Router(config-if)#int f0/0Router(config-if)#no ip nat insideRouter(config-if)#int f0/1Router(config-if)#no ip nat outsideRouter(config-if)#no ip nat inside source static 192.168.1.2 192.168.50.10 Router(config-if)#no ip nat inside source static 192.168.1.3 192.168.50.20Router(config-if)#***********************************

Overload NAT Conf.

Router(config)#in f0/0Router(config-if)#ip nat insideRouter(config-if)#int f 0/1Router(config-if)#ip nat outsideRouter(config-if)#exitRouter(config)#access-list 50 permit 192.168.1.0 0.0.0.255Router(config)#ip nat pool Alaflaj 192.168.50.50 192.168.50.50 netmask 255.255.255.0

7

Router(config)#ip nat inside source list 50 pool alaflaj overloadRouter(config)#exit

VerifyingRouter#sh run

Now, Send MSG from PC0 to PC3.Catch the MSG on router.

Your Notice??????

8