Double Nat with only a gateway

Hello Jorge,

Thank you for posting in the Microsoft Community,

I can see that you are getting double NAT your series X. Since your network setup is ONT gateway, you need to contact your ISP for more help.

See: Double NAT detected in your network settings | Xbox Support

I hope this helps. Please let me know if you have any other questions or concerns. I appreciate your cooperation and understanding. Have a great day!

hey - your Problem is: You are double Natted:

Your Modem is not a Modem it is a Gateway with it own Nat (I googled it). I´m not sure if it´s possible to bridge this Gateway - you have to ask your ISP. So it will work as a modem only without NAT.

If this is not possible maybe you can chane this gateway to a "normal" DOCSIS 3 Modem?

You own both a gateway and router?

Does your gateway have it's own DHCP server?

You mention using UPnP on both the gateway and router which suggest to me you may be behind a double NAT. double NATs are bad and will cause issues.

You need to make sure your gateway is in bridge mode so that it acts as a modem only.

One way to check this is to log in to your router and check the WAN settings to make sure you have a public IP address.

About the only way to get open NAT on 2 consoles is to have a good gaming router that does UPNP , your "Gateway" is most likely causing double nat ...if you cant get it in "bridge mode" you MAY have some luck ... , you may have to get a new modem (no gateway
, modem only)

Sorry for the delay xWarJar!

Both of your gateway's are doing NAT which also refers to double NAT. Double NAT is something that you want to avoid when it comes to connecting to Xbox LIVE.

Is it possible for you to connect your console directly to your SR350N DSL gateway and verify if you can connect properly.