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this post was submitted on 10 Nov 2023
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That all sounds correct to me. The random port you're seeing in the logs is a high port, often referred to as an ephemeral port, and it is common for source ports. All good there.
Ok, thanks - so if I understand correctly then, it is listening on port 22 as a default, and not accepting traffic on any port.
That brings of the question: wouldn't I be better off changing the SSH-port? And is that so easy as to uncomment the
#Port 22line in the config file and changing the port number to something random, and saving that somewhere? Would I then be able to connect by runningssh myuser@mydomain.com:, or would I need to do anything else to successfully connect?It’s recommended you keep the default port because as soon as your IP is known it takes less than 5 minutes to scan every port for an ssh port
Fair point! I first thought that would be good, as it would discourage all those random connections. My guess is that they won't bother spending 5 minutes on each server, and instead just move on to the next when they fail. But then I realized that I don't really care about those anyway as they're not getting anywhere with their root:mypassword login attempts.