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Comment by eqvinox | Hacker News Reader

The post isn't mentioning DHCPv6-PD[*] (prefix delegation.) I feel like murphy's law is kicking into effect right now and the ISP-provided router actually supports PD to give downstream routers their own /64.

(Or maybe not. Who knows. I feel like the post would've mentioned PD if they tried it.)

Also:

  I divided it into a smaller subnet 2001:db8:abc:123:40::/76

Anything on a broadcast/multinode segment that isn't /64 is heresy ;)

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[*]: https://en.wikipedia.org/wiki/Prefix_delegation

[*]: https://tools.ietf.org/html/rfc3633

[*]: https://github.com/openwrt/odhcp6c (-P option)

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Upvoting as good idea, but most routers I know, evening running custom firmware, don't support delegating a wan prefix on request from lan side.

Really depends on the ISP; it's actually on the certification mandatory feature list for some network operators. (Comcast, AFAIK.) But yeah, no way to tell if the particular device and setup the author has supports it.

(But it should be a very early thing to try, if it's available everything else becomes much easier.)

> But it should be a very early thing to try, if it's available everything else becomes much easier

I've tried to set up PD but it didn't work, so I've moved on with other options. Now, after you mentioned that, this feels like a good excuse to delve into what exactly didn't work back then.

I don't know about *WRT and Tomato, but OPNsense / pfSense and OpenBSD definitely support PD.

*WRT supported it last I checked, but that's no help in this case, as the ISP-provided locked-down router would need to support this.

(This isn't about ISP-provided locked-down routers either, though those are an abomination too IMHO. Regardless of whether the "last" ISP-controlled device is a plastic router in your home or an aggregator somewhere else, it needs to support and offer PD for you...)

Yes, it requires using your own router instead of the ISP's. I know the article says the ISP router is locked down, but it's not clear whether the ISP router is mandatory.

Happy starlink and pfsense user here doing just that.

Fritz!Box supports it (needs to be enabled in the IPv6 settings) so does OpenWRT

Fantastic, love my FritzBox, I'll look into this. Stand happily corrected!

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