I have an application that communicates via SSL, however, Port 443 is already in use by an IIS instance on that same server. Can I use another port other than 443 for SSL communication?
65.4k 7 7 gold badges 113 113 silver badges 168 168 bronze badges asked Aug 1, 2014 at 13:28 dandaman12 dandaman12 927 1 1 gold badge 6 6 silver badges 9 9 bronze badgesSSL is in no way tied to a single port value; in fact, as a protocol, it can be used over any transport medium, as long as that medium provides a bidirectional stream for arbitrary bytes.
In a Web context, you can use any port other than 443, provided that you specify it in the URL: https://www.example.com:7342/foobar.html
Note that there are some networks (especially some free WiFi access points) that don't allow traffic over other ports than 443 or 80; which means that using a port other than 443, though perfectly standard and supported, may imply some practical usage restrictions.