I did mention that the Linksys should be taken out of the equation. The ISP cable modem should be connected directly to the external interface of the ISA server. Elliott, you said enabled the External adapter and made it the gateway. Made it a gateway on what? ISA at that point is doing the routing from the Internal to the External and visa versa. The only change I make, is enabling the External adapter (12.249.21.225) and making it the default gateway while removing the gateway address from the Internal adapter. When I do that, I lose the ability to receive email from TZO. And John, we use the Linksys, it forwards port 25 to 192.168.1.xx to create a DMZ with a public web server that is off the SBS2000 server. What do you mean by off of? You have a public web server on a private IP address on port 25 on a separate subnet off the Linksys? That is why I asked earlier what your network is. It seems you are kind of doing things the hard way. Why not have the web server behind the ISA and have ISA do its work. If you can, please draw out your network so we can clearly understand your scenario. John Tolmachoff MCSE, CSSA IT Manager, Network Engineer RelianceSoft, Inc. Fullerton, CA 92835 www.reliancesoft.com