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The IPv6 Transition

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215 points todsacerdoti | 1 comments | 20 Oct 24 05:54 UTC | HN request time: 0.352s | source
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aidenn0 ◴[21 Oct 24 18:11 UTC] No.41906756[source]▶
I'll admit that while I run dual-stack for the public internet, I still haven't figured out a good way to manage my LAN with ipv6.

For ipv4, I have a DHCP server on the same machine as my DNSH server, which lets me configure my network in a single place. With IPv6 I'm still not sure exactly how to configure this. It seems like if I use SLAAC for a ULA, at least some hosts will still apply RFC 4941 (or maybe 8981; I'm not sure), which makes DNS unfeasible. So I guess maybe DHCPv6 is the answer (short of manually configuring each host)?

replies(2): >>41908415 #>>41908801 #
1. Dagonfly ◴[21 Oct 24 20:52 UTC] No.41908415[source]▶
Most hosts will generate both a stable and a temporary address when using SLAAC. The temporary address will be used for outbound traffic but the stable address will accept incoming traffic.

So there usually is a stable ULA or link-local that you can put in a local DNS AAAA record.

The PITA is that many services prefer GUA over ULA if available and don't gradually fall back to ULA if the WAN goes down. And you will still need dynDNS to VPN into your network because ISPs are allergic to stable IPv6 prefixes.