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How do I configure my SonicWALL (Enhanced OS) for Steam / Modern Warfare 2

I work at a small company that uses a sonicwall firewall. I was able to connect to steam and play modern warfare 2 online, but I could not get in a lobby with a friend. It always says NAT status: Strict in the game.

We have several WAN IP's and I've setup several different rules trying to get this to work. I looked up the ports for steam and modern warfare 2, and these are the ones I found:
27000-27030 UDP
27014-27030 TCP
28960 UDP
3101 UDP
3005 UDP
1500 UDP

Infinity Ward has a page (http://www.infinityward.com/nat) that is supposed to help with this, but all it says is to enable upnp which sonicwall and business firewalls do not support.

Any ideas on how to configure the rules for the sonicwall to allow traffic to a set of pcs for steam and mw2?
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1 Solution
Honestly, the purpose of the Sonic Wall is to Protect Critical Info and resist network attacks.

If you are just going to open a lot of ports, might as well put your PS3 / xBOX / PC on a DMZ port.

After you place in DMZ mode, use the SonicWall packet sniffer to what what other open ports you need for the MW2 to function after you remove it from DMZ.
If DMZ mode does not work at all, try a direct connection to your ISP.

If that fails, you may have to place Router Device in Bridged Mode to pass information to your PS3 / PC / Xbox, and allow uPNP traffic.


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