I have a user that cannot connect to our TFS 2012 server. When she tries to connect via Visual Studio she gets this mesage:
Team Foundation services are not available from server XXXXXXX.
Technical information (for administrator):
The server committed a protocol violation.
Section=ResponseStatusLine Retry
This user can connect from other machines, so it is not an issue with permissions in TFS. The server is definitely up and running as no other user is complaining. Connecting to the web ui of TFS with the urlhttp://XXXXXX:8080/tfs prompts for a userid and password which does not authenticate. The user is remote and accessing via a VPN. Using a different machine via the VPN does not have an issue. All indications are there is something on the machine that is causing the issue.