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       nsd - Name Server Daemon (NSD) version 3.2.5.


       nsd  [-4]  [-6] [-a ip-address] [-c configfile] [-d] [-f database] [-h]
       [-i  identity]  [-I  nsid]   [-l   logfile]   [-N   server-count]   [-n
       noncurrent-tcp-count]   [-P   pidfile]   [-p  port]  [-s  seconds]  [-t
       chrootdir] [-u username] [-V level] [-v]


       NSD is a complete implementation of an  authoritative  DNS  nameserver.
       Upon  startup,  NSD  will  read the database specified with -f database
       argument and put itself into background and answers queries on port  53
       or a different port specified with -p port option. The database must be
       generated beforehand with zonec(8). By default, NSD will  bind  to  all
       local  interfaces  available. Use the -a ip-address option to specify a
       single particular interface address to be  bound.  If  this  option  is
       given  more than once, NSD will bind its UDP and TCP sockets to all the
       specified ip-addresses separately. If  IPv6  is  enabled  when  NSD  is
       compiled an IPv6 address can also be specified.


       All  the  options  can  be  specified in the configfile ( -c argument),
       except for the -v and -h options.  If  options  are  specified  on  the
       commandline,  the  options  on the commandline take precedence over the
       options in the configfile.

       Normally NSD should be started with the ‘nsdc(8) start‘ command invoked
       from  a  /etc/rc.d/  script  or  similar  at the operating system

       -4     Only listen to IPv4 connections.

       -6     Only listen to IPv6 connections.

       -a ip-address
              Listen to the specified  ip-address.   The  ip-address  must  be
              specified  in  numeric  format  (using the standard IPv4 or IPv6
              notation). This flag can be specified multiple times  to  listen
              to  multiple  IP  addresses.  If this flag is not specified, NSD
              listens to all IP addresses.

       -c configfile
              Read   specified   configfile    instead    of    the    default
              /etc/nsd/nsd.conf.  For format description see nsd.conf(5).

       -d     Turn on debugging mode, do not fork, stay in the foreground.

       -f database
              Use   the   specified   database   instead  of  the  default  of
              /var/db/nsd/nsd.db.  If a zonesdir: is specified in  the  config
              file this path can be relative to that directory.

       -h     Print help information and exit.

       -i identity
              Return  the  specified  identity when asked for CH TXT ID.SERVER
              (This option is used to determine which server is answering  the
              queries  when  they  are  multicast).  The  default  is the name
              returned by gethostname(3).

       -I nsid
              Add the specified nsid to the EDNS section of  the  answer  when
              queried with an NSID EDNS enabled packet.

       -l logfile
              Log messages to the specified logfile.  The default is to log to
              stderr and syslog. If a zonesdir: is  specified  in  the  config
              file this path can be relative to that directory.

       -N count
              Start  count NSD servers. The default is 1. Starting more than a
              single server is only useful  on  machines  with  multiple  CPUs
              and/or network adapters.

       -n number
              The  maximum  number  of  concurrent  TCP connection that can be
              handled by each server. The default is 10.

       -P pidfile
              Use the specified  pidfile  instead  of  the  platform  specific
              default,  which  is  mostly /var/run/  If a zonesdir: is
              specified in the config file, this path can be relative to  that

       -p port
              Answer the queries on the specified port.  Normally this is port

       -s seconds
              Produce statistics dump every seconds seconds. This is equal  to
              sending SIGUSR1 to the daemon periodically.

       -t chroot
              Specifies  a  directory  to  chroot to upon startup. This option
              requires you to ensure that appropriate syslogd(8) socket  (e.g.
              chrootdir  /dev/log)  is  available, otherwise NSD won’t produce
              any log output.

       -u username
              Drop user and  group  privileges  to  those  of  username  after
              binding  the socket.  The username must be one of: username, id,
              or id.gid. For example: nsd, 80, or 80.80.

       -V level
              This  value  specifies  the  verbosity  level  for   (non-debug)
              logging.  Default is 0.

       -v     Print the version number of NSD to standard error and exit.

       NSD reacts to the following signals:

              Stop answering queries, shutdown, and exit normally.

       SIGHUP Reload the database.

              Dump BIND8-style statistics into the log. Ignored otherwise.


              default NSD database

              the process id of the name server.

              default NSD configuration file


       will  log  all the problems via the standard syslog(8) daemon facility,
       unless the -d option is specified.


       nsdc(8), nsd.conf(5),  nsd-checkconf(8),  nsd-notify(8),  nsd-patch(8),
       nsd-xfer(8), zonec(8)


       NSD  was  written  by  NLnet  Labs  and RIPE NCC joint team. Please see
       CREDITS file in the distribution for further details.


       NSD will answer  the  queries  erroneously  if  the  database  was  not
       properly  compiled with zonec(8). Therefore problems with misconfigured
       master zone files or zonec(8) bugs may not be visible until the queries
       are actually answered with NSD.