avahi-dnsconfd

Start the DNS configuration daemon

$ avahi-dnsconfd

$ avahi-dnsconfd --daemonize

$ avahi-dnsconfd --syslog

$ avahi-dnsconfd --kill

$ killall -HUP avahi-dnsconfd

avahi-dnsconfd [options]

avahi-dnsconfd is a daemon that configures unicast DNS servers based on mDNS/DNS-SD announcements on the local network. It connects to a running avahi-daemon and monitors for DNS server announcements.
When a unicast DNS server is announced or removed from the network, avahi-dnsconfd executes the action script /etc/avahi/avahi-dnsconfd.action to update the system's DNS configuration. This provides DHCP-like DNS server discovery using mDNS.
The daemon requires avahi-daemon to be running. It is useful in environments where DNS servers are dynamically announced via Zeroconf/Bonjour protocols rather than configured through traditional DHCP.

-D, --daemonize

Run as a background daemon and log to syslog

Log to syslog instead of stderr

Kill an already running avahi-dnsconfd instance

Refresh DNS server information

Check if daemon is running

Display help message

Show version information

/etc/avahi/avahi-dnsconfd.action

Shell script executed when DNS servers are discovered or removed on the network. Receives action type and DNS server address as arguments.

SIGINT, SIGTERM

Shutdown the daemon

Refresh DNS server data

Requires avahi-daemon to be running first. The action script must be properly configured to update DNS resolver settings. May conflict with other DNS management tools like NetworkManager or systemd-resolved if not properly integrated.

Avahi was created by Lennart Poettering and Trent Lloyd starting in 2005 as a free implementation of Zeroconf/mDNS/DNS-SD for Linux. The avahi-dnsconfd component was designed to integrate zero-configuration DNS server discovery with traditional unicast DNS resolution, allowing networks to operate without manual DNS configuration.

avahi-daemon(8), avahi-browse(1), systemd-resolved(8)