Avahi DNS configuration tool Avahi is a fully LGPL framework for Multicast DNS Service Discovery. It allows programs to publish and discover services and hosts running on a local network with no specific configuration. For example you can plug into a network and instantly find printers to print to, files to look at and people to talk to. This tool listens on the network for announced DNS servers and passes them to resolvconf so it can use them. This is very useful on autoconfigured IPv6 networks.