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A Short IPv6 Guide for Home IPv4 Admins
(gist.github.com)
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this post was submitted on 18 Jun 2024
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Ipv6 requires fundamental rethinking about how addressing is done. If you're trying to apply v4 concepts to V6 you likely end up running into something they intentionally designed out.
A unique local address is an address space where you could do that. It's the equivalent to RFC1918 eg. 172/192/10. So you could statically assign fd0::x, and that is expected, but not required generally.
I wouldn't give each device a static unique global address unless they need to be accessed via wan without domain consistently. You lose device privacy really quickly that way because every device gets a unique globally routable address. It's fine for internet facing services but most Linux, Windows, and mobile implementations are using ipv6 privacy extensions by default to ensure you get a random GUA every day.
My network is dual stack and I connect mostly over ipv6 to all my internal clients using internal DNS. If my internal DNS is ever down I can fall back to ipv4 or it's basically the one box on my network with an easy to remember ULA.
Each year I seem to think “this will be the year I set up IPv6 in my homelab” - but then I never get around to it.
If I have to run both v4 and v6 concurrently, there isn’t much incentive/motivation for me to use v6 locally.
Maybe I’ll get around to it when there’s a net benefit for me for my use case, or when I’m forced to.
Am I just imagining it to be more complicated than it actually is?
My router runs pfsense and I have 6 VLANs each with its own subnet - Management, Trusted, IoT, Cameras, Guest, and Web Facing Servers.
It's honestly super simple to set up. Outside of your ISP config it's almost all autoconfig. 100% of the complication (at least for me) comes from knowing ipv4 first for 20 years and then trying to incorrectly map those concepts to V6.
As soon as I "let go" it was fine.
There's not a huge net benefit you're right. I mostly wanted to learn and I hope to be at the front edge of disabling ipv4 in the near distant future.
Thanks, I’ll give it a go!
I suppose it’ll be easy since my whole stack uses IPv4, so I’ll be simply adding another interface on without service disruptions.