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I've had an open NAT all the way up until the power outage on Feb.15th. I've tried everything from factory reset to rebooting my Xbox and router. I currently have an AT&T gateway with the internet set to passthrough to my netduma R1. The R1 does not recognize my Xbox with Upnp enabled. I port forwarded all the correct ports and still get the error of Nat strict UPnP not successful. Dont know what else to do.

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What firmware are you currently running?

Did any of the upstream modem's settings change after the power outage or did you have any settings configured on there that could've been wiped when the router restarted?

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I think I’m running the latest firmware. I’ve done a complete factory reset and forwarded all the same ports. My router doesn’t see my Xbox. Only my Xbox and my computer are hooked up wired to the R1. 

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On the AT&T Modem, could you please try putting the R1s WAN IP (Found in System Information) in the DMZ? To do this you'll need to connect directly to the AT&T modem and access it's interface.

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OK thanks, were there any other settings in the AT+T interface you had configured previously? It's possible a power outage would've reset this.

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Op the first thing I would do in this situation is to check what port your Xbox is using.. Go into your Xbox and then to Network Settings.. Then go to Advance Settings.. On the very bottom of the Advance Settings will be what port your Xbox is using.. Usually its 3074.. But sometimes it can change if you have had a power outage or something out of the ordinary happens..

Id delete all your current port forwarding rules you have and start from scratch.. And make only a port forwarding rule just for the port your Xbox shows in the Advance Settings of the Xbox..

As an example lets say your Xbox port is still 3074.. Heres how I would set up the rule bellow..

Source Port..3074 Destination. 3544

Source Port. 3544 Destination. 3074

That would be for both TCP and UDP.. Even though UDP usually just works by itself..

Try that combination above and dont forget to double check what port your Xbox is actually using..

I noticed in your AT&T gateway that in the service tab it has 3544.. Which is why I suggest trying the port arrangement above.. 3544 is used in this situation when one usually has only IPV4..

Hopefully this gets you an Open NAT.

Good luck!

Zippy..

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