On Mon, Jun 16, 2025 at 3:15 PM Uroš Mikanovič <uros.mikano...@radiostudent.si> wrote: > > Thanks for the tips, I figured something out. > > Seems like mdns4_minimal is "shy". In the case of the "minimal" version > of `nss-mdns`, from the README: > > > * If the request does not end with `.local` or `.local.`, it is > > rejected. Example: `example.test` is rejected. > > > > * If the request has more than two labels, it is rejected. Example: > > `foo.bar.local` is rejected. **This is the two-label limit > > heuristic.** > > > > * If, during a request, the system-configured unicast DNS (specified > > in `/etc/resolv.conf`) reports an `SOA` record for the top-level > > `local` name, the request is rejected. Example: `host -t SOA local` > > returns something other than `Host local not found: > > 3(NXDOMAIN)`. **This is the unicast SOA heuristic.** > > > > * Otherwise, the request is processed. > > The first two points seem satisfied with `BRNBCF4D4182ECD.local`. > > `host -t SOA local` returns: > > ``` > local has SOA record local. nobody.invalid. 1 3600 1200 604800 10800 > ``` > > Not sure what to make of that as I don't really understand the point and
I'm guessing [whoever did this] is trying not to stomp all over people/orgs that are using the local. domain in DNS _and_ prevent xxx.local. name lookups from hitting the root DNS servers. Do we not like IPv6? why mdns4 instead of mdns? $ grep '^host' /etc/nsswitch.conf hosts: files mdns_minimal [NOTFOUND=return] dns This is my wife's Canon printer: $ ping 3EFEE0000000.local PING 3EFEE0000000.local(3EFEE0000000.local (fe80::dec2:c9ff:fe3e:fee0%enp1s0)) 56 data bytes 64 bytes from 3EFEE0000000.local (fe80::dec2:c9ff:fe3e:fee0%enp1s0): icmp_seq=1 ttl=64 time=3.24 ms 64 bytes from 3EFEE0000000.local (fe80::dec2:c9ff:fe3e:fee0%enp1s0): icmp_seq=2 ttl=64 time=2.25 ms 64 bytes from 3EFEE0000000.local (fe80::dec2:c9ff:fe3e:fee0%enp1s0): icmp_seq=3 ttl=64 time=2.27 ms ^C <.. snip ..> > I am still interested in what in my setup clashes with the way Debian > configures `nsswitch.conf` by default. Maybe you need to have the SOA for the local. domain return NXDOMAIN? $ host -t SOA local Host local not found: 3(NXDOMAIN) I dunno.. plenty too many guesses on my part here :( Lee
