That already has a (brutal) solution now - sslh https://www.rutschle.net/tech/sslh/README.html https://www.rutschle.net/tech/sslh/README.html - the current vers

That already has a (brutal) solution now - sslh https://www.rutschle.net/tech/sslh/README.html https://www.rutschle.net/tech/sslh/README.html - the current version is more sophisticated, but it was originally just a perl script that would send the connection to sshd or the https web server, based on regex matching on an initial string (and I probably timing out and going to sshd if it didn't see one? Something like that, I haven't dug out the old code to check.)