We have a new 4.5 server in it's own farm, on server 2003. I can connect internally using a custom ICA connection or quick launch but cannot connect from the Internet (we don't have WI for this system installed yet.) When I try to connect via Quick launch over the Internet I get a protocol driver error, from a custom ica connection I get XenApp server not available. Telnetting to port 1494 (get ICA) and 2598 work, as does connecting via rdp. From inside the network I can connect via ICA fine, but only using the internal name. On our 4.0 servers, I can connect using either. Anyone have any suggestions? NOTICE: This electronic mail transmission from the law firm of Dinsmore & Shohl may constitute an attorney-client communication that is privileged at law. It is not intended for transmission to, or receipt by, any unauthorized persons. If you have received this electronic mail transmission in error, please delete it from your system without copying it, and notify the sender by reply e-mail, so that our address record can be corrected.