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mdnsd(8) [netbsd man page]

MDNSD(8)						    BSD System Manager's Manual 						  MDNSD(8)

NAME

     mdnsd -- Multicast and Unicast DNS daemon

SYNOPSIS

     mdnsd

DESCRIPTION

     mdnsd (also known as mDNSResponder on some systems) is a daemon invoked at boot time to implement Multicast DNS and DNS Service Discovery.
     On Mac OS X 10.6 (Snow Leopard), mdnsd is also the system-wide Unicast DNS Resolver.

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

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

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

   LOGGING
     There are several methods with which to examine mdnsd's internal state for debugging and diagnostic purposes.  The syslogd(8) logging levels
     map as follows:

	   Error - Error messages
	   Warning - Client-initiated operations
	   Notice - Sleep proxy operations
	   Info - Informational messages

     By default, only log level Error is logged.

     A SIGUSR1 signal toggles additional logging, with Warning and Notice enabled by default:

	   # pkill -USR1 mdnsd

     A SIGUSR2 signal toggles packet logging:

	   # pkill -USR2 mdnsd

     A SIGINFO signal will dump a snapshot summary of the internal state to /var/log/system.log:

	   # pkill -INFO mdnsd

FILES

     /usr/sbin/mdnsd

SEE ALSO

     dns-sd(1), pkill(1), syslogd(8)

     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 mdnsd, see http://developer.apple.com/darwin/projects/bonjour/

HISTORY

     The mdnsd 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 mdnsd daemons for other platforms,
     including Mac OS 9, Microsoft Windows, Linux, FreeBSD, NetBSD, Solaris, and other POSIX systems.

BUGS

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

BSD
								 February 27, 2011							       BSD

Check Out this Related Man Page

networkd(8)						    BSD System Manager's Manual 					       networkd(8)

NAME

     networkd -- network daemon.

SYNOPSIS

     networkd

DESCRIPTION

     networkd is a launch-on-demand daemon that performs opreations on behalf of code in libystem_network, a component of libSystem.

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

   LOGGING
     There are several methods with which to examine networkd's internal state for debugging and diagnostic purposes. The syslog(1) logging levels
     map as follows:

	   Error - Error messages
	   Warning - Non-fatal concerns
	   Notice - Internal state messages
	   Info - Informational messages

     By default, only log level Notice through Error is logged.

     Syslog may be used to modify the mask which logging levels are logged.  For example, to enable log levels Emergency - Debug :

	   % sudo syslog -c networkd -d

     The networkd settings file may also be used to change the log level.  This method will add some additional logging that may be missing using
     the syslog technique listed above. This method is also persistent across runs of networkd For example, to enable log levels Emergency (1)
     through Debug (7):

	   % sudo defaults write /Library/Preferences/com.apple.networkd networkd_log_level -int 7

     The networkd settings file may also be used to change the log level for code in libsystem_network. For example, to enable log levels Emer-
     gency (1) through Debug (7) for libsystem_network code:

	   % sudo defaults write /Library/Preferences/com.apple.networkd libnetcore_log_level -int 7

     A SIGINFO signal will dump a snapshot summary of the internal state to the system log at log level NOTICE :

	   % sudo killall -INFO networkd

FILES

     /usr/libexec/networkd
	 The binary.

     /System/Library/LaunchDaemons/com.apple.networkd.plist
	 The launchd.plist(5) controlling the networkd job.

     /Library/Preferences/com.apple.networkd.plist
	 An optional preferences file read by networkd.

BUGS

     networkd bugs are tracked in Apple Radar component "networkd".

HISTORY

     networkd first appeared in Mac OS X 10.7.

SEE ALSO

     networkd_privileged(8), syslogd(8), launchd.plist(5)

Darwin								   June 2, 2019 							    Darwin
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