Step 1 – Connect to your server using SSH. If you are using Windows you can use the program Putty or if you are using iOS simply use the terminal.

Step 2 – Now find the below line in the sshd_config file:

This line indicates which port you are using for SSH.

Step 3 – Remove the # symbol to uncomment the line. This can be done by hitting the X key whilst the cursor is over the # symbol. Edit the number “22” to your desired port value, the valid range for the port is 0 to 65535. Press ESC and type :wq, this exits you out from edit mode.
W stands for write and Q for quit. In this example i have chosen to use port 57343.

Step 4 – Now we need to update the firewall rules. Enter the command below.

Step 5 – Save the new settings using the command below

Step 6 – We need to test whether our new SSH port working or not. But before that disable the firewall temporarily.

Step 7 – Type the following command to reload SSHD service:

Step 8 – You can verify the new port settings using the command below.

Step 9 – If we see that the new port is working fine, we will start firewall using the commands:

Step 10 – Without closing this session, try and connect using your new port. If you are successful then please enter the below command to drop port 22 from the SSH access list.