I have configured Citrix clients (through IE 5.5) to connect to a remote citrix system. Ports used are 80, 1494 and 11494 (custom port). Ports 1494 and 11494 work fine, port 80 doesn't. Method of testing is to telnet to ts3.e-servicing.nl 80, on port 1494 and 11494 I get ICA ICA ICA replies, on port 80 however I get no reply at all. Telnetting to these ports without going through the ISA server does gove the right restults on all 3 ports. I think because port 80 is also the default listener port on ISA is causing the problem. Does anybody out there know of a fix for this problem? Johan Geugies