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I was reading more about erlang:is_port/1 so I decided to test it with several values.
I saw that with normal sockets it replies true if the socket is up and false otherwise (i.e. socket is down).
Can is_port/1 be used also with ssl sockets? I tried but it always returns false.
If you refer to a SSL Socket as the returned value from (for example)
ssl:connect/2,3, then the answer is “no”. The SSL Sockets in the context of the SSL application are of asslsocket()type, which, according to the documentation are opaque to the user and definitely not a port. Specifically, they are records: