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Error Code: 521

Hi!I'm having a problem accessing some websites and I keep on getting error code 521 when trying to browse to those sites. Does anyone know what that error code means?

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 • AT&T Internet Email & Security

108

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At&t unite pro - Strict NAT type.

Hello, I have the At&t unite pro and after setting up Upnp and even trying portforwading and dmz, I'm getting a Strict Nat type from the xbox one and other consoles.  This causes lots of connectivity problems when playing online with friends.  How do I resolve this so that I have an OPEN Nat type? 

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 • Data & Messaging Features, Internet Tethering

14.3K

20

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