Need to rcon your Left 4 Dead server remotely? Half Life Server Watch (HLSW) is just what you need …
Once it is installed you will need to register an email address and password.
Once HLSW is running simply enter the IP of your server with the port:
Type in the Rcon password and click Test. You should see Status: OK.
Click the Console tab and then type in your Rcon command in the field above and then click Send.