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Can I use Glance solutions behind a firewall or HTTP proxy server?

In most cases, yes. When you start a session, Glance attempts to connect to our servers using TCP/IP to destination port 5500. If it cannot connect to this port, Glance attempts to "tunnel" through the firewall via HTTP to destination port 80.  

Glance automatically chooses the best of several web browser technologies to help guests connect to sessions. Guests either connect to destination port 5500 or tunnel HTTP to destination port 80. 

We're constantly improving our ability to connect immediately and reliably. If you encounter a problem connecting, please let us know.