IPV6 Passthrough T-Mobile

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Doner005

• October 15, 2025 16:19

I have gone through support and still found no solution to get IPv6 working. Almost every other router on the market can pass through IPv6 from T-Mobile and have it working with no issues so I’m not sure why this is such a problem for Firewalla. I’m even using my own equipment in bridge mode and I’m told this still cant be done because T-Mobile doesn’t give out an IPv6 prefix apparently. Do I need to keep making support cases for this? If a gl.inet router has no problem do it surely a Firewalla router can handle it

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  Mgullt

  • October 15, 2025 19:13

  Hi Doner005. Have you found a set-up/router/firewall that does work with T-mobile's Gateway? I'm a bit challenged in the computer world, and had difficulty with a purchased modem needed to enable firewalla gold to work with my internet service (and difficulty with the set-up).... and frankly hoping someone savvy who understands the technical terms and workings will say, "just get this other router similar to the gold." Fully get it if there's no such thing, and upon a short looking, doesn't seem the gold will work with t-mobile gateway. hoping someone can school me differently, or tell me a similar option with the gateway. thanks

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  Doner005

  • October 15, 2025 21:59

  Any Firewalla router will work with T-Mobile internet. You just won’t get working IPv6 out of it.

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  Firewalla

  • October 16, 2025 03:39

  Forwarded to our team, we do have a tmobile gateway, will see if it is something we can do 

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  Mgullt

  • October 17, 2025 01:05

  Thank you Doner005.

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  farmerdanl

  • November 19, 2025 19:40

  Any updates to this thread?

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  Doner005

  • November 19, 2025 19:47

  I have a ticket open with Firewalla and they say they are buying a flint 2 router for their lab to get IPv6 working on their products. So hopefully sometime soon they will get it working since most other routers can do it.

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  Firewalla

  • November 20, 2025 01:48

  We did have someone investigate the solution, seems the only way possible is doing some type of IPv6 NAT and make it working. If you have a solution that's working today, can you ping the device inside of your network using its IPv6 address directly from outside of the network?

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  Doner005

  • November 20, 2025 02:58

  I don’t own a gl.inet router but this seems like it should be something you guys can easily implement if budget routers are doing it. I have friends with gl.inet routers that have working IPv6 on T-Mobile in Nat6 mode and IPv6 passthrough mode.

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  Firewalla

  • November 21, 2025 18:53

  We just tried gl.inet router with T-Mobile; 

  1. Passthrough does NOT work. T-Mobile does not assign ipv6 addresses. We are using T-Mobile (big black colored router, in Bay Area)

  2. NAT works ... but no point in using it, since it is no different from v4 NAT.

   

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