Can you surf normally from the Exch server? Does it resolve names at all? What happens if you try to do an nslookup on various names? Also, the packet filters in ISA are usually there to allow computers to talk to the ISA server, and allow the ISA server to talk to other computers - and don't really have any baring on whether or not a packet gets forwarded thru the ISA server. Matt -----Original Message----- From: geraint.bowcott@xxxxxxxxxxxxxxxx [mailto:geraint.bowcott@xxxxxxxxxxxxxxxx] Sent: Wednesday, May 01, 2002 3:07 AM To: [ISAserver.org Discussion List] Subject: [isalist] Exch 2000 ISA Resolving ISP smart host http://www.ISAserver.org Can anyone help please? We are implementing Exch 2000 and ISA and have the problem that the Exch server can not resolve the name of the smarthost server (ISP) through ISA server. They are both on diff servers. The name can be resolved on the ISA server but not Exch server? The Exch server is set to point to External DNS servers of the ISP and also has the ISA server internal card set as it's default gateway. I've also set a port 53/TCP allow filter on ISA but no joy. Any suggestions please? TIA Geraint Bowcott ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: matt.walkowiak@xxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')