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Home Internet Double NAT Question
Posted on 4/19/26 at 2:36 pm
Posted on 4/19/26 at 2:36 pm
In New Orleans and use Cox for internet only, ATT fiber not available. Paying $150/month for 1G with Cox with a data limit which if we exceed that can be $200/month +, just for internet. I'm going to try out Tmobile for unlimited $50/month. We're fine with 200-300 mbps, we do very little gaming, primarily streaming and work. Also saving $1,000+ year is awesome.
But one challenge, looks like Tmobile gateway (5G Gateway G5AR/G5SE) doesn't allow me to disable the wifi or use bridge mode to connect to my nighthawk mesh router which I want to keep using. And I don't want to put the nighthawk in access point mode because I use guest networks and use other features.
Question for Board...I know if I can't turn the wifi off on the gateway and connect my nighthawk mesh I will create a "Double NAT" issue. However for regular residential use Double NAT really a problem, especially if there will never be a single device connected to the tmobile wifi network?
For saving $1000/year I'm fine with lower speeds and getting away from Cox, but I can't deal with reliability or connection issues. Thanks.
But one challenge, looks like Tmobile gateway (5G Gateway G5AR/G5SE) doesn't allow me to disable the wifi or use bridge mode to connect to my nighthawk mesh router which I want to keep using. And I don't want to put the nighthawk in access point mode because I use guest networks and use other features.
Question for Board...I know if I can't turn the wifi off on the gateway and connect my nighthawk mesh I will create a "Double NAT" issue. However for regular residential use Double NAT really a problem, especially if there will never be a single device connected to the tmobile wifi network?
For saving $1000/year I'm fine with lower speeds and getting away from Cox, but I can't deal with reliability or connection issues. Thanks.
Posted on 4/19/26 at 3:00 pm to NOLALGD
You'll never notice being double NAT'd
Posted on 4/19/26 at 5:15 pm to bluebarracuda
Thanks for the response.
Posted on 4/19/26 at 6:02 pm to NOLALGD
You can use the Hint Control app to turn off the G5AR Gateway Wifi.
Posted on 4/19/26 at 7:34 pm to NOLALGD
If you’re using 5g internet then you’re already double NAT, so now you’re just triple. No big deal.
This post was edited on 4/19/26 at 7:35 pm
Posted on 4/19/26 at 8:32 pm to NOLALGD
Be aware that T-Mobile uses cgnat
Posted on 4/21/26 at 9:45 pm to NOLALGD
They give you a satellite receive for your T-Mobile mesh system. I tried it. It worked great for myself and my wife.
However, I had both my kids living at home, both gamers. Both live streaming. My wife and I needed to video conference with clients. The system could not handle that. But just for the two of us, it worked great.
However, I had both my kids living at home, both gamers. Both live streaming. My wife and I needed to video conference with clients. The system could not handle that. But just for the two of us, it worked great.
Posted on 10/21/26 at 11:52 am to NOLALGD
Double NAT only really bites if you're forwarding ports, running a VPN, or hosting something. For streaming and work with nothing connected to the T-Mobile wifi it's basically a non issue.
The thing that actually annoys people on T-Mobile home internet is CGNAT, not double NAT. You're behind their carrier grade NAT so you don't get a public IP anyway, which kills port forwarding and remote access regardless of how your router's set up.
If you're not gaming or hosting, the setup you're describing works fine and the $1000 a year is the real win. I use Smart Move Internet and it's been reliable for exactly that kind of use, streaming and work with none of the port forwarding headaches.
The thing that actually annoys people on T-Mobile home internet is CGNAT, not double NAT. You're behind their carrier grade NAT so you don't get a public IP anyway, which kills port forwarding and remote access regardless of how your router's set up.
If you're not gaming or hosting, the setup you're describing works fine and the $1000 a year is the real win. I use Smart Move Internet and it's been reliable for exactly that kind of use, streaming and work with none of the port forwarding headaches.
This post was edited on 10/23/26 at 5:31 am
Posted on 10/21/26 at 1:49 pm to NOLALGD
It's not really an issue as others have said.
That being said, you can help it by putting your Nighthawk's IP in a DMZ on your tmo gateway. That is the standard workaround when you can't use bridge mode to still get most of the benefits.
That being said, you can help it by putting your Nighthawk's IP in a DMZ on your tmo gateway. That is the standard workaround when you can't use bridge mode to still get most of the benefits.
Posted on 10/21/26 at 2:04 pm to UltimateHog
I dont think DMZ accomplishes anything with CGNAT because you still dont get a public IPV4 address.
Posted on 10/22/26 at 12:24 am to notsince98
Yeah you'd have to use a tunneling service. Not really worth it.
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