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I have a PK5000Z from Qwest, and an XBOX360, I had an issue previously with a PK5000 made by Actiontec, with NAT issues, set to moderate, it doesnt let me hear all players in a xbox live party chat, or in game. Ive called xbox, actiontec, and qwest. No one can seem to set it to open. Qwest finally gave up and gave me a PK5000Z, which is said to be made to work with consoles, yet now I have a strict NAT. I tried looking up my modem/router in ZyXEL's website, but it doesnt have it under the list of products. I'm at wit's end, please help.

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I have same modem i called qwesest i called makers of modem zyxel put my ps3 in dmz didn't work gave it a static ip still strict nat type i called sony and they gave me some ports to try to open along with activision sony ports TCP start and end same port first is 80 so start 80 end 80. then its 447,5227,9293, UDP is 3478,3479,3658,10070. now ativision say to open pot 28960 for both tcp and udp i just did but i haven't checked if it work.

Posted on Nov 01, 2010

  • zwalt83 Nov 01, 2010

    sorry for all the spelling lol was in a hurry anyways in resonse to the other soultion the max mtu is 1479 on this modem and i can't find where spi firewall is.

  • zwalt83 Nov 01, 2010

    this is nothing i tink its cause its a dsl router/modem so it has like 2 firewalls or something thing is pissing me off thats forsure


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Try turnig off all restrictions related. like , S.P.I. (statefull packet inspection) and try setting firewall setting for the address of the Xbox to "DMZ" . check setting of M.T.U. in router, adjust it to 1580

Good luck.

Posted on Sep 27, 2010


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None of these answers are solving my real problem. My xbox 360 says I have a strict NAT setting which limits things I can do on xbox live. I have a Zyxel Qwest pk5000z modem, and I have gotten to the NAT...

Technically the best support you could find for this is either going to be on the official game's forums or on the Steampowered forms (even if you didn't buy the game through Steam)
They already have the answers to your questions.

However to give you an idea as to what NAT is and why it shouldn't be affecting you too much:
Network Address Translation is a means of taking your 1 "internet" IP and translating it into potentially hundreds of local IPs (usually the 192.168.x.x range)

Usually NAT is configured on the Router, maybe your modem is also acting as a router.

If you disable it then you're using your actual internet IPs given by your Internet Provider, the problem with that is usually you're limited on how many you have (personally my provider gives me 5 internet IPs so I could have 5 routers and hundreds of computers with just those 5 IPs being handed out using NAT)

I played XBL with strict NAT and never had any problems personally, you may be looking in the wrong area for help with your issue.

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