Windows 2003 Shared Hosting

How can we share Internet(more than 30 host ) from windows 2003 domain enviroment ? what is SSL?
Senario: small network only 40 to 50 host and server win xp 2003 domail enviroment :

If you're in charge of a domain based network of 40-50 PCs surely you know enough about Win2003 Server and routers to set it up to share the internet ?

Please advise how to share internet (host – ms server 2003 / client – xp (proff)?
We are using windows server 2003 for Ms. Exchange, network users are concocted with local domin. Please advise how to share internet from windows server ?

For better control of your user community use proxy server software in your exchange server.There are bunch of free proxy servers available in Internet. You can use windows based squid proxy.with this you will not have any hassels of local domain or whatever.