An empty `allow-interfaces=` makes the system not reachable

[votdev]

If set to the empty list all local interfaces except loopback and point-to-point will be used.

Even if the documentation tells that it should work, it simply does not. I need to uncomment the allow-interfaces= line in /etc/avahi/avahi-daemon.conf and restart the service with systemctl restart avahi-daemon.service to make the system reachable again.

The problem occurs on Debian 12 with the following package versions.

# dpkg -l | grep avahi
ii  avahi-daemon                    0.8-10                               amd64        Avahi mDNS/DNS-SD daemon
ii  libavahi-client3:amd64          0.8-10                               amd64        Avahi client library
ii  libavahi-common-data:amd64      0.8-10                               amd64        Avahi common data files
ii  libavahi-common3:amd64          0.8-10                               amd64        Avahi common library
ii  libavahi-core7:amd64            0.8-10                               amd64        Avahi's embeddable mDNS/DNS-SD library

[votdev]

After some confusion about what local means I have to reopen the issue.

[evverx]

Looks like it's a documentation bug. It should probably say that it should be unset to pick up the default interfaces. It's unset in the default config coming with avahi.

[tomeq82]

Exactly, this is documentation/functionality bug - empty string "allow-interfaces" makes NO interfaces catched/enumerated thus virtually avahi not working at all. No matter which distro, Avahi 0.8