I am the admin of one of our proxys. Personally i dont got a teamviewer license so i cant open a supportticket but some of our external supporter use this tool to help us with some internal applications.
for 1 year now everything was working fine and we were able to connect to teamviewer.
But for 2 months now the teamviewer isnt working anymore (10, 11 and 12 all 3 verions)
I tested this on 2008R2 , Win 7
Our Porxy is a squid connected with our main company parent proxy (parent only let us connect through 80 and 443 so we cant use the 5938 teamviewer port but this was never a problem..)
In our proxy log I see, that teamviewer connections are allowed and the parent is only a scanner proxy there is no deny rule.
The version 10 of teamviewer quickly changes state from connected to not connected
11 and 12 I got the message that they cant connect to the teamviewer servers.