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mdnsresponder(8) [osx man page]

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

mDNSResponder -- Multicast and Unicast DNS daemon SYNOPSIS
mDNSResponder (also known as mdnsd 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), mDNSResponder is also the system-wide Unicast DNS Resolver. mDNSResponder listens on 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 Unicast and 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. LOGGING
There are several methods with which to examine mDNSResponder's internal state for debugging and diagnostic purposes. The syslog(1) 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: % sudo killall -USR1 mDNSResponder Once this logging is enabled, users can additionally use syslog(1) to change the log filter for the process. For example, to enable log lev- els Emergency - Debug: % sudo syslog -c mDNSResponder -d A SIGUSR2 signal toggles packet logging: % sudo killall -USR2 mDNSResponder A SIGINFO signal will dump a snapshot summary of the internal state to /var/log/system.log: % sudo killall -INFO mDNSResponder FILES
/usr/sbin/mDNSResponder INFO
For information on Multicast DNS, see For information on DNS Service Discovery, see For information on how to use the Multicast DNS and the DNS Service Discovery APIs on Mac OS X and other platforms, see For the source code to mDNSResponder, see 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 plat- forms, including Mac OS 9, Microsoft Windows, Linux, FreeBSD, NetBSD, Solaris, and other POSIX systems. Darwin June 1, 2019 Darwin

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

netbiosd -- NetBIOS protocol daemon SYNOPSIS
netbiosd [options] DESCRIPTION
netbiosd is responsible for interacting with NetBIOS networks. netbiosd registers and defends one or more NetBIOS name, depending on the set of configured services. It also browses and scavenges names from the NetBIOS network, making them available to the system through mDNSResponder. OPTIONS
-debug The service will log extensive debug information and may perform extra diagnostic checks. This option is typically only useful for debugging. -dump-packets Pretty-print all sent and received NetBIOS packets to the output log. This option is typically only useful for debugging. -help Prints a usage message and exits. -max-refresh Maximum time (in seconds) between searches to refresh the workgroup list. -min-refresh Minimum time (in seconds) between searches to refresh the workgroup list. -stdout Causes netbiosd to print log messages to standard output instead of the system log. FILES
/Library/Preferences/SystemConfiguration/ The primary configuration for the SMB stack. This file is updated by various system services and should not be edited by hand. /System/Library/LaunchDaemons/ The netbiosd service's property list file for launchd(8). SIGNALS
SIGHUP This signal causes netbiosd to reconfigure. It will first unregister any NetBIOS names it has registered. Then it will determine its new set of NetBIOS names and register those. SIGUSR1 This signal causes netbiosd to toggle debug logging. SEE ALSO
launchd(8), mDNSResponder(8) STANDARDS
The TCP/UDP embodiment of the NetBIOS protocol is documented in RFC 1002 Protocol standard for a NetBIOS service on a TCP/UDP: Detailed Specifications, 1987 RFC 1001 Protocol standard for a NetBIOS service on a TCP/UDP: Concepts and Methods, 1987 The NetBIOS browsing protocol is documented as part of the Microsoft Work Group Server Protocol Program (WSPP) technical documentation set, specifically MS-BRWS Common Internet File System (CIFS) Browser Protocol Specification HISTORY
The netbiosd utility first appeared in Mac OS 10.7. Darwin June 2, 2019 Darwin
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