Windows Server Standard 2008 with TS, TS Remote App, TS Gateway, TS Web Access and IIS roles/services running
Works great from the internal network and I can access and authenticate the TS Web Access page from the outside using our public IP and https without any issues. On the Web Remote Access site under RemoteApp Programs, when I click on calculator or any apps it goes through the authentication and then it gives me the following error"This computer can't connect to the remote computer because the Terminal Services Gateway server address is unreachable or incorrect. Type a valid server address." I haved "googled" this issue for almost 2 mths without any success and I am under pressure to complete this ASAP and need any direct assistance. Also on the Web Remote Access under Remote Desktop if I try connecting to any computer under the same domain I get the following error"This computer can't connect to the remote computer. Remote Desktop cannot find the remote computer. Type the computer name or IP address again, and then try connecting. If the problem continues, contact the owner of the remote computer or your network administrator."
I have check TS Gateway policies and groups and all check OK. I have followed all steps by Microsoft TechNet guides to the letter... I am stump! Windows firewall is disabled and NAT has been configured to resolved my TS Server IP to the public IP. We are using Sonic Firewall on the outside.
Services are all running.... There are no GPO's enabled. Out of the box /default setting for most services as specified by MS TechNet documentation