NAT with ATT router

[tjones9163]

Hello, I have been playing on my Xbox one and have noticed lag and checked my NAT type and it was set to strict, so I access my ATT router page and went to Firewall/port forwarding and then under allocation, I can either use (default server mode) or (passthrough mode). right now I am using it in (default server mode) with the IP and MAC address set to that of my XBOX. I then reset my router and my Xbox and it worked...my NAT type is now open. I didn't have to mess with or add any settings In the NAT section but I still managed to get open NAT.
My first question is in the Ip passthrough section what is the difference between passthrough mode and default server mode?
My second question is what is the difference between going with NAT or going with IP passthrough because apparently both work and is what I changed ok?

 

[stdragon]

If you want to use your own router for NAT and avoid double-NATing, then you will need place it in DMZPlus mode inside the ATT router. This is so you can pass the public IP to the WAN port of your own personal router (non-ATT branded)

 

[tjones9163]

If you want to use your own router for NAT and avoid double-NATing, then you will need to place it in DMZPlus mode inside the ATT router. This is so you can pass the public IP to the WAN port of your own personal router (non-ATT branded)

My att router doesn't support DMZ.
What is double NATing and what router would you recommend?

 

[stdragon]

Just to clarify, you're not using another router, just the ATT unit. Is that correct?

 

[tjones9163]

Just to clarify, you're not using another router, just the ATT unit. Is that correct?

Correct and thank you for replys

 

[stdragon]

So, you'll want to use NAT and not IP Passthrough. Meaning, you don't want to expose your X-Box to all port traffic from the outside. Basically, with IP Passthrough, the XBox will get assigned a public IP. With NAT, it's a normal private IP.

https://www.att.com/esupport/article.html#!/smb-internet/KM1188700

 

[stdragon]

As for lag, neither forms of NAT have anything to do with that. Most likely the problem is with WiFi or with your internet connection itself.

Edit: If you're on 2.4Ghz WiFi, try 5Ghz or vice versa.

 

[tjones9163]

So, you'll want to use NAT and not IP Passthrough. Meaning, you don't want to expose your X-Box to all port traffic from the outside. Basically, with IP Passthrough, the XBox will get assigned a public IP. With NAT, it's a normal private IP.

https://www.att.com/esupport/article.html#!/smb-internet/KM1188700

perfect explanation. The only thing is under NAT settings tab there is a drop-down menu with known NAT services like call of duty ect. ect but there isnt one for Xbox one. But there is another option underneath it that says add custom services. Is that what I would have to do?

 

[stdragon]

Most likely add custom services. If it's listed, it's just an added convenience. They're just pre-set custom services anyways.

https://support.xbox.com/en-US/xbox-one/networking/network-ports-used-xbox-live

Ports required to use Xbox Live
These ports must be open for Xbox Live to work:

Port 88 (UDP)
Port 3074 (UDP and TCP)
Port 53 (UDP and TCP)
Port 80 (TCP)
Port 500 (UDP)
Port 3544 (UDP)
Port 4500 (UDP)

 

[stdragon]

Honestly, I'm not sure you need to port-forward anything. If it's not uPnP based, the games and services are all cloud-based. In other words, because you're not hosting traffic direct to your ATT connection, the X-Box will initiate ports of communication on its own to the cloud based gaming services hosted elsewhere.