[botmeister]

Since your router IP is 84.65.111.53, you will be able to ping it from outside your LAN via the internet. You cannot however ping anything inside your LAN from the internet which is why a ping of 192.168.7.1 or .2 will not work.

You have to enable port forwarding on the router (84.65.111.53) so that it forwards packets based on the HLDS server port to the correct LAN ip (192.168.7.1).

Basically, you have to tell the router to forward all requests for port 27015 (that's the default for HLDS, but you may be using something different) to go to local IP 192.168.7.2 (which is where your server resides).

You also have to tell HLDS to use the router IP 84.65.111.53 by setting the CVAR "ip 84.65.111.53" so that server queries can determine what the correct IP for your server is (otherwise they will see the local LAN ip which is not assessible).

Finally, you have to make sure that your local server can communicate with the internet through the router (of course).