My work friends and I have played on FAF for a few years but can no longer log in from the office. It seems the new client (0.10.5-beta) is trying to use a new port (8001) which would be blocked on our firewall. Since we can't just go unblocking random ports on the company firewall, are any alternative ports on the server open for connection? It seems the second default of 15000 in the login screen (the hidden bit where you put in URLs and port numbers) is not active.
I don't know what port FAF Client used to use, but I'm assuming it changed as that is where the problem is now occurring.