From the Steam client, click on the "View" menu at the top and choose "Servers"
Click on the "Favorites" tab
Click on "ADD A SERVER" at the lower right
Type in the hostname (or IP) and portADD THIS ADDRESS TO FAVORITES
Click "Refresh" on your favorites tab
Select the new server and "CONNECT"You may have to do this a few times, something is weird
Enter the password and click "CONNECT"