As alot of you know I have a server setup but when I plug it into the router it does not work because the router blocks it and I have tried everything opening ports and all and it still blocks it. So what I was wanting to do since I can't fix it is buy a new network card so I can have to network adapters or connections one on the motherboard and one on pci. I was wondering if with the two if I could take one from the dsl modem and hook it up to the pc and then use the other port and hook it to the router and still be able to have the internet on my pc and everyone through the router after can anyone help me thanks!!!

 The computer that is configured for DMZ(de-militarized zone=battlefield!!!danger) will be completely vulnerable on the Internet,and as you know as was said this can be a big problem if not dealt with correctly, so I wouldsuggest that you try opening ports from the Virtual Server or Firewall settings before using DMZ if Im understanding what it is your trying to do,(gamer) I think I would try this first although you may still have to take another route!!!!
Microwave©

no it shoudn't expose my pc because u have norton iternet security and more.

but as far as I know with the DMZ's on the "el-cheapo" home routers, they are not "true-dmz's" where the computer is actually isolated from the other segments in your home.

Generally when you configure a dirty-DMZ in a corporate environment, the server may be on the 192.168.1.x network, while the rest of your machines will be on the 192.168.2.x network. and the router has the routes setup in such a way that the hosts on the DMZ cannot initiate connections to anywhere.

Now with these home routers, there is only a single DHCP scope, meaning you can't setup 192.168.1.x and 192.168.2.x...because the router inside interface (where all hosts reside) is going to be 192.168.1.1...or the first useable address in the DHCP scope defined.

Using *real* network equipment, you can setup a virtual interface on the router, so that the single *inside* interface is not only 192.168.1.1 but also 192.168.2.1, then you could have multiple computers hooked into the same switch with different addresses and in order for them to talk they'd have to traverse the router.

In other words...as far as I can tell the DMZ feature on the home routers is crap.  Setup port forwarding to port 80 on that server and use IPSEC rules or a firewall to stop the server from talking to other hosts on your network.  It would also be a good idea to setup personal firewalls on the other computers just to prevent them from being attacked in the event the server is compromised.

Alternatively you could look at taking an old computer and loading astaro on it, which will give you 3 interfaces on your router, which is what you really need to seperate the server from the other hosts.

Another possibility would be getting another el-cheapo router and plugging that in behind your existing router and setup a different address scheme.

Good I fooled you.  I just like to throw out key buzz words and form intelligent sounding sentences.

Microwave,

I usually do my best to toss in words that let me off the hook in case I'm way off base and have no idea what I am talking about...these include but are not limited to: "as far as I know, generally, as far as I can tell, possibility...etc. etc"

I've been playing around with computers for awhile now, and one thing I've learned is...when you think you know a thing or two, you don't know $hit.  

I recently did a phone interview with Microsoft for a job...and the guy on the other end was asking me some of the wildest questions...like what is a gratuitous arp?  Which I had no clue on whatsoever...but those who are wondering, when a computer fires up its' IP Stack it sends out a message asking for its own IP address to see if there's a duplicate address on the line.