Well, the meta server seems to be up again my problem is solved!

@DinoSteve: Here, let me resummarize my situation because I think its not clarified enough: I have bought the game DEFCON from a site called Direct2Drive.com (btw the site is legal!). Now I have a code for the game. I have it installed on two computers; my desktop (the one i mainly play defcon from)...

yes!!!!!!!!

I have officially attempted everything in the support page, and every trick up my sleeve (from Port Fowarding to DMZ to direct connection to clean reinstall of defcon to all ports and connections WIDE OPEN). The only things I could come up with now is that the Metaserver is doing maintenence (if it ...

It may seem strange, but trying to view a Dedcon file might help in troubleshooting. If it doesn't show up on the metaserver, you can try connecting directly with the IP method, via the filter in Defcon

Where could I find this "Dedcon" File?

The unknown authentication status means that you are not connecting to the metaserver. Thus, either the metaserver is down, or there is something wrong with your internet connection. Either of these problems would also prevent you from joining games. Check your firewall settings, and perhaps try en...

Did you try reading this, then this? If yes and you still have a problem after that, then: What version of Windows are you using? Steam or non-Steam version of Defcon? Full or demo version of Defcon? Has your network set-up changed recently? Describe your local network i.e what wireless router, wha...

I have defcon installed on my machine. For some reason now, I can't seem to connect to any game servers now and its saying at the bottom, Authentication Key Unknown. What is this problem, how do I fix it, and how can I prevent it from happening again?