mDNSResponder

NAME
     mDNSResponder -- Multicast DNS daemon

SYNOPSIS
     mDNSResponder

DESCRIPTION
     mDNSResponder (also known as mdnsd on some systems) is a daemon invoked
     at boot time to implement Multicast DNS and DNS Service Discovery.

     mDNSResponder listens UDP port 5353 for Multicast DNS Query packets.
     When it receives a query for which it knows an answer, mDNSResponder
     issues the appropriate Multicast DNS Reply packet.

     mDNSResponder also performs Multicast DNS Queries on behalf of client
     processes, and maintains a cache of the replies.

     mDNSResponder has no user-specifiable command-line argument, and users
     should not run mDNSResponder manually.

     To examine mDNSResponder's internal state, for debugging and disagnostic
     purposes, send it a SIGINFO signal, and it will then dump a snapshot summary
     of its internal state to /var/log/system.log, e.g.

           sudo killall -INFO mDNSResponder

FILES
     /usr/sbin/mDNSResponder

SEE ALSO
     mDNS(1)

     For information on Multicast DNS, see http://www.multicastdns.org/

     For information on DNS Service Discovery, see http://www.dns-sd.org/

     For information on how to use the Multicast DNS and the DNS Service Discovery
     APIs on Mac OS X and other platforms, see
     http://developer.apple.com/bonjour/

     For the source code to mDNSResponder, see
     http://developer.apple.com/darwin/projects/bonjour/

BUGS
     mDNSResponder bugs are tracked in Apple Radar component "mDNSResponder".

HISTORY
     The mDNSResponder daemon first appeared in Mac OS X 10.2 (Jaguar).

     Also available from the Darwin open source repository (though not officially
     supported by Apple) are mDNSResponder daemons for other platforms,
     including Mac OS 9, Microsoft Windows, Linux, FreeBSD, NetBSD, Solaris,
     and other POSIX systems.

Darwin                          August 11, 2005                         Darwin