SSH Port 202 not working after changing /etc/ssh/sshd_config

[archos]

Hi everyone,

Yesterday, I reinstalled and restored my server, and everything went smoothly without any issues. After the installation, I tried to change the SSH port to 202 in the /etc/ssh/sshd_config file. I added the following line:

Port 202   # Do not use any other port. Only this port is not blocked by the Cloudron firewall

Then, I restarted SSH using:

systemctl restart ssh

(I noticed that older documents suggest systemctl restart sshd, but that doesn't seem to work anymore). However, I still can't connect via port 202. I have to use the default connection command:

ssh user@ip_server

I'm running Ubuntu 24.04.01 LTS. Is this method still valid for Cloudron, or did I miss something?

Thanks for your help!

[matix131997]

After changing the port, then you have to connect this way:

ssh user@ip_server -p 202

[archos]

@matix131997 I tried connecting with the following command:

ssh -p 202 root@ip

But it fails with the error:

Connection refused

It seems like port 22 is still open, and port 202 doesn't work. I was expecting that after the restart, port 22 would be closed and I would only be able to connect through port 202.

[msbt]

Ran into the same issue, apparently Ubuntu 24 requires an edit in /lib/systemd/system/ssh.socket as well, you need to adjust the ListenStream to 202 and trigger a systemctl daemon-reload - after that it should be listening on port 202.

[necrevistonnezr]

This should be in the Cloudron docs…

[girish]

So, I didn't have to change /lib/systemd/system/ssh.socket at all. But I did have to reboot the server since a simple systemctl restart ssh did not work. Curiously, after reboot the socket file still has ListenStream as 22 but I can connect only to 202.

[girish]

I added a note to reboot in the docs.

[matix131997]

I was about to write a long time ago that the parameter for resetting SSH has changed:

sudo systemctl restart ssh.socket