I have server 2003 and I have to share internet on. So what are the services I need to configure on server side as well as on client side.
Thanks

Insufficient information. Not only that, but if you have a copy of Server 2003 and you don't even know how to set up a shared internet connection, it sounds like maybe you SHOULDN'T have a copy of Server 2003. Use XP. It's simpler, easier, and in your case, probably legal.