freechat/docs/content/overview/connections.md

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Connections	conns	7

Most servers will likely run on one of three ports, 80 for basic HTTP, 443 for secure HTTP traffic, or 4536 for most others. If using a special port then servers should expect user applications to specify the port.

For connections over SSH or other protocols it really is up to server owners to let new users know about this important detail. SSH based servers are not discouraged, in fact they are highly encouraged to exist and operate :^)