- Login to the game control panel
- Click the 'Commandline Manager' button.
- Click 'New'
- Check off (enable) the applicable checkboxes to enable them.
- Enter your passwords as desired.
- Save the command line.
- Click "Select" on the right hand side of the page.
Note: If you are having trouble joining a server with a password, please try entering it from within the game and not the Steam browser.