I have an XBOX 360 connected to my network. My firewall is a Watchguard Firebox III 700. I have ports 88 UDP, 3074 UDP, and 3074 TCP open to the IP address of my XBOX. My XBOX can connect to XBOX Live but it says I have a strict NAT. This is keeping me from playing multi-player games online. I want to know how to set up the Firebox to allow open NAT to the XBOX.
I setup a SNAT to point to my xbox. I also added the xbox live DNS names to the proxy exceptions.
*.corexchange.com
*.rapidvps.net
Once I added these entries in I was able to connect to live with no issues.
Make sure you also open the ports on your router. IF you have all the appropriate ports open and still have strict NAT, it's more than likely your ISP and you should give them a call.
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The Watchguard Firebox is also the router. It is the only device between my network and the cable modem. My ISP is Comcast.
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