I hope that this is just a stupid question, I probably haven't read the correct bit of the docs. We have sucessfully published a website from a client m/c behind an ISA server. Works great. But on the same machine we have another server running that publishes on port 8081 (rather than 80) I've set up (I think !) ip filters and protocol rules for tcp 8081 but still get refused access Any thoughts TIA Richard