I can't get connected from behind my firewall - what ports need to be open?

Currently, CrossBrowserTesting communicates via port 6020-6100 from a single IP (crossbrowsertesting.com). The connection is initiated from your pc via the built in java vnc client, so for most firewalls they will automatically allow the response. If it is not, you will need to configure it to allow return traffic for connections through ports 6020-6040. This is VNC traffic running over TCP protocol.

Note: This range was increased from 6020-6040 to 6020-6100 on July 11th, 2010 to accommodate the additional volume of sessions we were seeing. If you had to alter your firewall to allow access to CrossBrowserTesting, please increase the range to allow ports 6020-6100.