See also sslh. (Or sshl, I forget which way round it goes.) Which claims some ssh clients are eager (sending a greeting without waiting for the ssh server greet

See also sslh. (Or sshl, I forget which way round it goes.) Which claims some ssh clients are eager (sending a greeting without waiting for the ssh server greeting). I was once unable to connect to my sshd on port 443 when I was using the free wifi in a pub. The firewall appeared to be blocking the connection: presumably it was checking whether the connection was really ssl or not.