I'd like to ask for an advice - I've setup new Windows Server 2008 and this machine is behind ISA firewall.
Customer's network specialist configured on ISA server opened ports 80 and 443 for web access and port 3399 for remote administration via RDP (I don't know why 3399 instead of 3389, maybe to not use the default port number which could attract potential hacker's attention).
I installed Terminal Services together with TS Web Access and TS RemoteApps. Everything works fine through LAN and WAN except one thing: When I open TS Web Access from the Internet, I can see the page with published RemoteApps, but can not start any of them. There appears an error message stating something like "can not connect to remote server".
So I guess that RemoteApps communicate via port 3389, but I have no idea if this is correct information and if there are some additional ports in use, that must be enabled to allow RemoteApps to the Internet.
Thank you very much in advance