CounterStrike server port problem

[pappo]

I am running Hoary and I created a dedicated server for CounterStrike Source.

I can see the server from my other PC's on the home lan, but I my son could not see the server (port 27015) until I made the Ubuntu server a DMZ, on my DLink router.

I am using a cable modem, into a DLink router which acts as my gateway (192.160.0.1).

I don't want to make my Ubuntu server a DMZ because it will always be seen by the internet.
Does anyone know why Ubuntu is denying access to the 27015 port from my router/gateway, but is allowing access to the port from any other computer on my home (192.168.0.X) network ?

I am not running DHCP. All four home PC's have a static IP.
The network consists of the Ubuntu machine, two WinXP's, and one Win2000Pro machines.

Thanks.
Phil

[Ctrl]

Guessing by your question. DMZ in router works. Then its the router and not Ubuntu
thats need a config.
What you need to do is a portforwarding. Think its called virtual server in the router settings.

I dont know what model of Dlink router you have but there are plenty sites that describe how to do it.
http://portforward.com/routers.htm should be able to help you.

[pappo]

Ctrl - Thanks for the reply.
I do have a virtual server setup forwarding port 27015 to the Ubuntu machines IP address. I had that before I used the DMZ option.
Yes, with DMZ set to my Ubuntu machine, outside people can see my CS server, but just using Virtual Server they cannot.