mDNS

OpenWrt (umdns)

/etc/config/umdns

config umdns
    ...
    list network lan    # Use hard tabs!

/etc/umdns/*.json

{
  "custom_name": { "service": "_type._proto.local", "port": 123, "txt": [ "key=value" ] }
}

Linux (systemd-resolved)

Resolving

/etc/systemd/resolved.conf

[Resolve]
...
LLMNR=no
MulticastDNS=yes

resolvectl llmnr eth0 no
resolvectl mdns eth0 yes

Announcing

Reference

/etc/systemd/dnssd/*.dnssd

[Service]
Name=%H
Type=_http._tcp
Port=80