3.
Designate the HTTPS port number to be used for [HTTPS – HTTPS port].
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Available port number: 1 - 65535
The following port numbers are unavailable since they are already in use.
20, 21, 23, 25, 42, 53, 67, 68, 69, 80, 110, 123, 161, 162, 554, 995, 10669, 10670, 59000 - 61000