Hi: I try to disable all p2p softwares and messenger service in my office. Are there any software I can block p2p and messenger services? Here is my server layout Internet -> Server(win2003) -> Router -> Clients I plan to use the server to block it because all server connection must pass thought the server.

ISA 2006 But I wouldn't load it on your server if it's doing other server functions on your network. It should be on a dedicated server. Also, bad idea that your main server according to the above is directly connected to the internet instead of the router. "Enough, enough bowing down to disillusion! Hats off & applause to rogues & evolution! The ripple effect is too good not to mention. If you’re not affected, you’re not paying attention!"

Oh actually that is a subserver for 1 department. I just try to layout the department structure.

Any Windows server other than a firewall shouldn't be directly connected to the internet without a firewall in front. Honestly, any server period shouldn't be directly exposed to the internet without a firewall device in front. "Enough, enough bowing down to disillusion! Hats off & applause to rogues & evolution! The ripple effect is too good not to mention. If you’re not affected, you’re not paying attention!"

www.packeteer.com wow, server facing the internet .. not good. I would do it this way. Internet -> Firewall -> (perhaps ISA) -> Server(win2003) -> Router -> Clients ISA is a nice firewall, but more or less ment as a extra layor .. not as a primary facing firewall. Let your applience do the bulk of the filtering, ISA will do the layer 6/7 stuff.