nat to let internet access internal devices

[Richy]

http://www.cisco.com/warp/public/556/12.html#topic6 All I want to do is run a web server behind the nat router. I turned on nat and mapped the outside ip to the ip of the web server.Do I have to use access lists or do I have to let internal users access the internet to get the return packets through nat?

[marvin]

The nat will allow the web server to be accessed by external users with the external translated address. Internal users should be able to access using the inside address (the address of the web server).