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How to configure IPv6 when the ISP provides NO PD (prefix delegation)
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Topic: How to configure IPv6 when the ISP provides NO PD (prefix delegation) (Read 506 times)
logi
Jr. Member
Posts: 67
Karma: 2
How to configure IPv6 when the ISP provides NO PD (prefix delegation)
«
on:
September 04, 2024, 04:12:15 am »
Using TMHI as ISP, they provide /64, therefore no PD, in OpenWrt I have used Relay Mode, and the router acts as a bridge for IPv6 between the WAN and the LAN, I didn’t find an equivalent mode in OPNsense, is it possible to configure something equivalent in OPNsense? Thanks
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franco
Administrator
Hero Member
Posts: 17609
Karma: 1603
Re: How to configure IPv6 when the ISP provides NO PD (prefix delegation)
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Reply #1 on:
September 04, 2024, 07:55:03 am »
Normally you want an NA (a /128) on WAN and the PD (/64) on LAN. It only works automatically if your ISP gives you both. There are some other solutions like NDP proxies but they are not readily available for OPNsense.
Note a /64 address should be a SLAAC address and doesn't necessarily give you Internet access (it should but sometimes it sadly does not).
Cheers,
Franco
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logi
Jr. Member
Posts: 67
Karma: 2
Re: How to configure IPv6 when the ISP provides NO PD (prefix delegation)
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Reply #2 on:
September 05, 2024, 05:49:11 pm »
Quote from: franco on September 04, 2024, 07:55:03 am
There are some other solutions like NDP proxies but they are not readily available for OPNsense.
That's exactly what I have used with OpenWrt and other commercial routers,
NDP Proxy
or
IPv6 Passthrough
, any timeline when NDP Proxy will be available or a guide on how to manually implement it with the current version of OPNsense? I will really appreciate any help, thank you
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franco
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Posts: 17609
Karma: 1603
Re: How to configure IPv6 when the ISP provides NO PD (prefix delegation)
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Reply #3 on:
September 05, 2024, 09:44:40 pm »
Maurice was looking into it at some point, but seems to be inconclusive or lacking the time. As far as roadmap for the core goes at the moment we don't want to tackle this subject as there is too much IPv6 improvements that should precede this like IPv6 only PPP (which will be on the roadmap for 25.1).
Cheers,
Franco
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muchacha_grande
Full Member
Posts: 219
Karma: 19
Re: How to configure IPv6 when the ISP provides NO PD (prefix delegation)
«
Reply #4 on:
September 06, 2024, 04:00:11 am »
I had this case years ago.. I mean, I'm on the same case that @logi.
Some years ago (two or three) my ISP started to assign IPs v6 but no PD. My workaround was to use NAT and subnet the /64 address they assigned.
I know that NAT is almost forbidden in IPv6 but I didn't find anything better yet. It passes all IPv6 tests out there and it works fine.
Forget to use IPv6 on Android because it needs SLAAC and SLAAC needs a /64 net. But works flawlessly on the rest of the cases.
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How to configure IPv6 when the ISP provides NO PD (prefix delegation)