IP NAT on 2620

[fkseow]

Hi anyone please help to explain the difference between "ip nat inside" and "ip nat outside".

If I have one server with internal IP 172.18.18.20 need to be published with Public IP of 202.184.98.20, so in terms of Cisco router command, what should we type then ? Any sample configuration ?

Please help out.

Thank you.

[steve.barlow · Accepted solution]

This link should help explain:

http://www.cisco.com/warp/public/556/12.html

In your example:

s0 (internet interface)

ip nat outside

e0 (internal network)

ip nat inside

ip nat inside source static 172.18.18.20 202.184.98.20

(this will translate 172.18.18.20 into the 202.184.98.20 address).

Hope that helps

Steve