SSH is still listening on port 22 after change to a new port?

boyla · 04-06-2011, 09:18 PM

Hello,

I edited "sshd_config" file and changed port 22 to a new port. After I restart ssh, it listens on port 22 and the new port.
How can I disable SSH to listen on port 22? I'm using Debian.

kirukan · 04-06-2011, 11:22 PM

What port number you used to change? before change the port just confirm whether the port assigned to any other service on /etc/services. I think you have to use the port number above 1024.

gilead · 04-06-2011, 11:58 PM

Can you post your sshd_config file so we can see the changes you made please?

boyla · 04-07-2011, 02:31 AM

I changed to port 2567.
What I did is:

nano /etc/ssh/sshd_config

change Port 22 to 2567 -> save sshd_config

/etc/init.d/ssh restart

After that I try to access the server via port 22 and 2567. Both ports work! I don't know why sshd is still listening on port 22?

Reuti · 04-07-2011, 05:53 AM

Often I find it more reliable to stop and start a service instead of using reload or restart. What daemons do you see running with:

Code:

ps -e f

(f w/o -). Is there one or two sshd processes?

jschiwal · 04-07-2011, 06:23 AM

Did you remove the # at the beginning of the line? If not, the default will be still used.

Did you have an active session when you restarted the ssh service? Port 22 may be open from a connection made before the the change.

Do you have more than one "Port ..." lines in the configuration. I don't know what would happen if you did.

Is sshd an xinetd service?

Is there a router you are going though that is changing port numbers?

chrism01 · 04-08-2011, 01:26 AM

As per post #3, don't just tell us what you thought you did, always best to post the current sshd_config file content.