Firewalls and Proxies

Glance Screen Share automatically senses and works with most proxy server and firewall configurations, without needing adjustments by technical staff and by identifying the best protocol for each participant's network environment.

Each participant reaches the Glance Screen Share service with an outward-bound connection, using TLS to port 5501. If that attempt is denied or times out, Glance Screen Share tunnels HTTPS to the standard port 443. Since TLS is more efficient than HTTPS, a company that blocks port 5501 might consider adding a rule to their firewall policy that allows outbound connections to those ports at the glance.net servers. The IP address blocks are listed here.

Glance Cobrowse and Glance Video session servers use secure https and WebSocket connections to communicate with browsers.

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