Is there any standard alternative HTTPS port?

Question

HTTP has some well-known alternative ports, like 8080, etc.

If I need to deploy any service which is served through secure HTTP, or maybe I need to assign any port to a HTTPS service on my local machine, but I already have another HTTPS service handling the 443 port, is there any convention about which port to use?

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Side note: this question was posted for reference means since the answer was already posted to a question, but that question was not asking exactly that - anyway the answer was collecting lots of positive votes.

Answer 1

There is no standard about that, but port 8443 is sometimes known as the http-alt, and it seems the only one being popularly used as alternative HTTPS port.

It may have become popular because of mod_nss (an HTTPD module alternative to mod_ssl) using it on its default configuration.