nmblookup



NMBLOOKUP(1)                                                      NMBLOOKUP(1)




NAME

       nmblookup - NetBIOS over TCP/IP client used to lookup NetBIOS names


SYNOPSIS

       nmblookup [-M] [-R] [-S] [-r] [-A] [-h] [-B <broadcast address>]
                 [-U <unicast address>] [-d <debug level>]
                 [-s <smb config file>] [-i <NetBIOS scope>] [-T] [-f] {name}



DESCRIPTION

       This tool is part of the samba(7) suite.


       nmblookup  is  used to query NetBIOS names and map them to IP addresses
       in a network using NetBIOS over TCP/IP queries. The options  allow  the
       name  queries  to be directed at a particular IP broadcast area or to a
       particular machine. All queries are done over UDP.



OPTIONS

       -M     Searches for a master browser by looking  up  the  NetBIOS  name
              name  with a type of 0x1d. If  name is "-" then it does a lookup
              on the special name__MSBROWSE__. Please note that  in  order  to
              use  the  name "-", you need to make sure "-" isn’t parsed as an
              argument, e.g. use :nmblookup -M -- -.


       -R     Set the recursion desired bit in the packet to  do  a  recursive
              lookup. This is used when sending a name query to a machine run-
              ning a WINS server and the user wishes to query the names in the
              WINS server. If this bit is unset the normal (broadcast respond-
              ing) NetBIOS processing code on a machine is used  instead.  See
              RFC1001, RFC1002 for details.


       -S     Once  the  name  query has returned an IP address then do a node
              status query as well. A node status query  returns  the  NetBIOS
              names registered by a host.


       -r     Try  and bind to UDP port 137 to send and receive UDP datagrams.
              The reason for this option is a bug in Windows 95 where  it  ig-
              nores  the source port of the requesting packet and only replies
              to UDP port 137. Unfortunately, on most UNIX systems root privi-
              lege  is  needed  to  bind to this port, and in addition, if the
              nmbd(8) daemon is running on this machine it also binds to  this
              port.


       -A     Interpret  name  as  an IP Address and do a node status query on
              this address.


       -n <primary NetBIOS name>
              This option allows you to override the NetBIOS name  that  Samba
              uses  for itself. This is identical to setting the  parameter in
              the smb.conf file. However, a command  line  setting  will  take
              precedence over settings in smb.conf.


       -i <scope>
              This specifies a NetBIOS scope that nmblookup will use to commu-
              nicate with when generating NetBIOS names. For  details  on  the
              use  of NetBIOS scopes, see rfc1001.txt and rfc1002.txt. NetBIOS
              scopes are very rarely used, only set this parameter if you  are
              the  system  administrator  in charge of all the NetBIOS systems
              you communicate with.


       -W|--workgroup=domain
              Set the SMB domain of the username. This overrides  the  default
              domain  which  is  the domain defined in smb.conf. If the domain
              specified is the same as the servers NetBIOS name, it causes the
              client  to log on using the servers local SAM (as opposed to the
              Domain SAM).


       -O socket options
              TCP socket options to set on the client socket. See  the  socket
              options  parameter  in  the smb.conf manual page for the list of
              valid options.


       -h|--help
              Print a summary of command line options.


       -B <broadcast address>
              Send the query to the given broadcast address. Without this  op-
              tion  the  default behavior of nmblookup is to send the query to
              the broadcast address of the network interfaces  as  either  au-
              to-detected  or  defined  in  the  interfaces  parameter  of the
              smb.conf(5) file.


       -U <unicast address>
              Do a unicast query to the specified address or host unicast  ad-
              dress. This option (along with the -R option) is needed to query
              a WINS server.


       -V     Prints the program version number.


       -s <configuration file>
              The file specified contains the configuration  details  required
              by the server. The information in this file includes server-spe-
              cific information such as what printcap file to use, as well  as
              descriptions  of all the services that the server is to provide.
              See smb.conf for more  information.  The  default  configuration
              file name is determined at compile time.


       -d|--debug=debuglevel
              debuglevel is an integer from 0 to 10. The default value if this
              parameter is not specified is zero.

              The higher this value, the more detail will be logged to the log
              files about the activities of the server. At level 0, only crit-
              ical errors and serious warnings will be logged. Level  1  is  a
              reasonable  level  for day-to-day running - it generates a small
              amount of information about operations carried out.

              Levels above 1 will generate considerable amounts of  log  data,
              and  should  only  be  used when investigating a problem. Levels
              above 3 are designed for use only  by  developers  and  generate
              HUGE amounts of log data, most of which is extremely cryptic.

              Note  that specifying this parameter here will override the  pa-
              rameter in the smb.conf file.


       -l|--logfile=logdirectory
              Base directory name for log/debug files. The  extension  ".prog-
              name"  will  be appended (e.g. log.smbclient, log.smbd, etc...).
              The log file is never removed by the client.


       -T     This causes any IP addresses found in the lookup to be looked up
              via a reverse DNS lookup into a DNS name, and printed out before
              each

              IP address .... NetBIOS name

              pair that is the normal output.


       -f     Show which flags apply to the name that has been looked up. Pos-
              sible  answers  are  zero  or  more of: Response, Authoritative,
              Truncated, Recursion_Desired, Recursion_Available, Broadcast.


       name   This is the NetBIOS name being queried. Depending upon the  pre-
              vious  options  this  may  be a NetBIOS name or IP address. If a
              NetBIOS name then the different name types may be  specified  by
              appending  ’#<type>’  to  the  name.  This name may also be ’*’,
              which will return all registered names within a broadcast  area.



EXAMPLES

       nmblookup  can be used to query a WINS server (in the same way nslookup
       is used to query DNS servers). To query a WINS server,  nmblookup  must
       be called like this:


       nmblookup -U server -R name


       For example, running :


       nmblookup -U samba.org -R IRIX#1B


       would query the WINS server samba.org for the domain master browser (1B
       name type) for the IRIX workgroup.



VERSION

       This man page is correct for version 3.0 of the Samba suite.



SEE ALSO

       nmbd(8), samba(7), and smb.conf(5).



AUTHOR

       The original Samba software and related utilities were created  by  An-
       drew  Tridgell.  Samba  is  now  developed by the Samba Team as an Open
       Source project similar to the way the Linux kernel is developed.


       The original Samba man pages were written by Karl Auer.  The  man  page
       sources  were converted to YODL format (another excellent piece of Open
       Source software, available at ftp://ftp.icce.rug.nl/pub/unix/) and  up-
       dated  for  the  Samba 2.0 release by Jeremy Allison. The conversion to
       DocBook for Samba 2.2 was done by Gerald Carter. The conversion to Doc-
       Book XML 4.2 for Samba 3.0 was done by Alexander Bokovoy.




                                                                  NMBLOOKUP(1)

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