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2026-09-07 21:11:34 UTC

niconiconi on Nostr: How to manually assign a IPv4 link-local address (169.254.0.0/16) legally, without ...

How to manually assign a IPv4 link-local address (169.254.0.0/16) legally, without violating RFC 3927's rule: only a IPV4LL daemon can assign the IP automatically using the algorithm, it SHOULD NOT be manually assigned. The loophole is that RFC 3927 also says the initial IPV4LL address SHOULD be derived from the MAC address. And IEEE explicitly provides "locally administered address" for manual MAC assignment. To get your IP, brute-force avahi-autoipd's MAC to IP hash, and hardcode your MACs accordingly.