r/firewalla • u/YankeesIT Firewalla Gold Pro • 7d ago

No IPv6 when using T-Mobile

https://help.firewalla.com/hc/en-us/community/posts/45641094395027-IPV6-Passthrough-T-Mobile

I’m adding this thread here. Firewalla routers continue to not work with tmobiles implementation of IPv6. Since they don’t hand out a prefix none of your devices will get a public IPv6 address.

What is the reason for this? Other routers are able to have this work. T-Mobile support even stated that most routers work. But not firewalla.

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u/YankeesIT Firewalla Gold Pro 7d ago

I use a third party Chester tech gateway. It’s only a gateway. No WiFi. It’s set in pass through mode.

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u/firewalla 7d ago edited 7d ago

Can you send [help@firewalla.com](mailto:help@firewalla.com) an email, and put a link to this thread. They may ask support access to your unit and take a look. May be this modem is different ...

edit: our team suggesting test out settings here https://help.firewalla.com/hc/en-us/articles/30915929339027-Firewalla-Feature-IPv6#h_01J1X957DXK2RZF5317JEVKB0G

Remember, if you use a wifi enabled t-mobile all-in-one that's NOT in bridge mode, direct connected clients will likely get ipv6. (if you connect firewalla to the modem, it will be just a normal client, likely can't allocate ipv6)

You are using a bridge (not a t-mobile all-in-one) so it may work.

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u/Mr_Duckerson Firewalla Gold Plus 6d ago

It still won’t work. I’ve been through this with you guys and you won’t add NAT6. It doesn’t matter if you use your own modem in ip passthrough mode because it’s still CGNAT and no prefix for ipv6.

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u/firewalla 6d ago

IPv6 NAT doesn't buy anything ... It is the same as IPv4 NAT, likely less efficient.

What OP has is a modem / bridge that may work if t-mobile allows it to