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Help with IPv6 (lemmy.world)

submitted 4 months ago by cakeofhonor@lemmy.world to c/selfhosted@lemmy.world

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My ISP recently made IPv6 available and I'm trying to figure out how to make it work with my network. The setup I have is an OPNsense box connected to my ISP's router and I'm using it to isolate my homelab from the rest of the network. However, the machines on my OPNsense LAN aren't being assigned IPv6 addresses that allow them to connect to the internet.

I can ping IPv6 sites from my OPNsense box and I see that it's being assigned a /64 prefix from the ISP router. If I use my laptop to connect to my ISP's router, I can visit IPv6 sites just fine as well. My devices in the OPNsense LAN also have IPv6 addresses and can ping each other using IPv6 but not the internet.

Are there special settings that I need to set for OPNsense to make this setup work? I've tried reading up on the different modes like SLAAC but I'm not quite grasping the concepts.

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[–] chronicledmonocle@lemmy.world 0 points 4 months ago* (last edited 4 months ago) (3 children)

If you're getting a /64 from your ISP via DHCPv6, you likely need to send a prefix hint. I'd guess /60. Then you'll have multiple /64s to work with on your inside interfaces.

Who is the ISP?

[–] cakeofhonor@lemmy.world 2 points 4 months ago* (last edited 4 months ago)

If it's any use, here are the WAN IPv6 options (auto, manual, or IPv6CP Extension) for the ZTE-ZXHN-F670, it's set to auto right now:

And these are the available LAN settings:

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