Configure cisco Router 2811 and Configure Natting with Two ethernet ports

Configure cisco Router 2811 and Configure Natting with Two ethernet ports

Here we are going to confgure cisco router 2811/2611 with the ISP connection and create natting .

telnet 192.168.0.1 (Router Ip)

Enter passwd - xyz

step 1 :-

hostname>en - enable to login to router configuration
passwd - abc

hostname# sh run - to see running configuration

hostname# config t - To configure terminal

step 2 :-

hostname(config)#ip name-server 203.148.202.3
hostname(config)#ip name-server 203.148.202.4

where 203.148.202.3 and 203.148.202.4 are all the available dns server ip

step 3 :-


hostname(config)#interface FastEthernet0/0

hostname(config-if)#ip address 58.68.30.130 255.255.255.0

Ip 58.68.30.130 is the public Ip provided by the ISP and this ip will be natted with your complete network.I mean your network will have 192.168.0.1,2,3 series but outside this will be your main nattimg IP

hostname(config-if)ip nat outside
hostname(config-if)duplex auto
hostname(config-if)speed auto

hostname(config-if)control+Z - save configuration

hostname#wr - write the changes


step 4 :-

hostname#config t
hostname(config)# interface FastEthernet0/1
hostname(config-if)#ip address 192.168.0.2 255.255.255.0

This will be Ip series you can use in your network now

hostname(config-if)#ip nat inside
hostname(config-if)#duplex auto
hostname(config-if)#speed auto

hostname(config-if)control+Z - save configuration

hostname#wr - write the changes

step 5 :-

hostname#config t

hostname(config)#ip classless
hostname(config)#ip route 0.0.0.0 0.0.0.0 FastEthernet0/0

hostname(config)#ip http server
hostname(config)#ip nat inside source list 1 interface FastEthernet0/0 overload
hostname(config)#access-list 1 permit 192.168.0.0 0.0.0.255

This last step is very important and while to get any error in above steps just ignore because some router come with this configuration already set

hostname(config)#control+Z
hostname#wr - save the changes

Restart the router 1 or 2 times and your router is ready configured and natting is also done


Thanks
Naveen