NMBLOOKUP(1)			 User Commands			  NMBLOOKUP(1)



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

SYNOPSIS
       nmblookup [-M|--master-browser] [-R|--recursion] [-S|--status]
	[-r|--root-port] [-A|--lookup-by-ip]
	[-B|--broadcast <broadcast address>] [-U|--unicast <unicast address>]
	[-d <debug level>] [-s <smb config file>] [-i <NetBIOS scope>]
	[-T|--translate] [-f|--flags] {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|--master-browser
	   Searches for a master browser by looking up the NetBIOS 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|--recursion
	   Set the recursion desired bit in the packet to do a recursive
	   lookup. This is used when sending a name query to a machine running
	   a WINS server and the user wishes to query the names in the WINS
	   server. If this bit is unset the normal (broadcast responding)
	   NetBIOS processing code on a machine is used instead. See RFC1001,
	   RFC1002 for details.

       -S|--status
	   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|--root-port
	   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 ignores the
	   source port of the requesting packet and only replies to UDP port
	   137. Unfortunately, on most UNIX systems root privilege 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|--lookup-by-ip
	   Interpret name as an IP Address and do a node status query on this
	   address.

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

       -i|--scope <scope>
	   This specifies a NetBIOS scope that nmblookup will use to
	   communicate 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 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.

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

       --usage
	   Display brief usage message.

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

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

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

	   The higher this value, the more detail will be logged to the log
	   files about the activities of the server. At level 0, only critical
	   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 log
	   level parameter in the smb.conf file.

       -V|--version
	   Prints the program version number.

       -s|--configfile=<configuration file>
	   The file specified contains the configuration details required by
	   the server. The information in this file includes server-specific
	   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.

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

       --option=<name>=<value>
	   Set the smb.conf(5) option "<name>" to value "<value>" from the
	   command line. This overrides compiled-in defaults and options read
	   from the configuration file.

       -T|--translate
	   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|--flags
	   Show which flags apply to the name that has been looked up.
	   Possible 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 previous
	   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 part of version 4.10.16 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
       Andrew Tridgell. Samba is now developed by the Samba Team as an Open
       Source project similar to the way the Linux kernel is developed.



Samba 4.10.16			  11/17/2023			  NMBLOOKUP(1)