Changing the port sshd listens on is a simple process; it’s just a matter of updating your sshd_config file and then reloading the new configuration.
Use the procedure below to change the port that sshd is listening on to 2995:
Warning: Incorrectly following this procedure may render your server unreachable through SSH. If by following this procedure you are locked out of your server, and you require Spry Support to reset SSHD, you may incur a support fee for resetting SSH on your server.
1. From your terminal session, edit /etc/ssh/sshd_config
Code:bash-2.05b# vi /etc/ssh/sshd_config
2. Look for the following line:
3. Change the line so it looks like this:
4. Save and close the file
5. Load the new configuration by using the RedHat service command
Code:bash-2.05b# service sshd reload
Note: you may immediately lose connectivity to your server on the open ssh session you are currently running.
6. Test the connection
Code:(tres@Ishmael)(~/Desktop) $ ssh firstname.lastname@example.org -p 2995
Take note of the -p 2995 flag used when connecting to the server. If you are using OS X or a Linux desktop system like Mandriva or Ubuntu, you’ll need to specify the port number when connecting. If you’re using PuTTy on Windows, you can specify the port number in the profile for you connection and then re-save the profile using the new port.