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Written by Lennart Poettering on 2024-12-17 at 08:30

3️⃣6️⃣ Here's the 36th post highlighting key new features of the current v257 release of systemd. #systemd257

With the advent of DNS-over-TLS and DNS-over-HTTP a new set DHCP fields have been defined that can designate specific DNS servers with various protocol properties, in RFC 9463 ("DNR").

This is particularly relevant, since when connecting to a DNS server with encryption it's generally essential to know the Authentication Domain Name ("ADN") of the server to contact.

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Toot

Written by Lennart Poettering on 2024-12-17 at 08:32

With v257 networkd's DHCP logic can properly decode these fields now, and make them available for higher level code.

Note that systemd-resolved doesn't pick up this information and use it yet in v257, but that's on the TODO list for v258, now that the data is readily available.

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