NMBLOOKUP(1)                     User Commands                    NMBLOOKUP(1)

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

       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}

       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.

           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 -- -.

           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.

           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.

           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.

           Interpret name as an IP Address and do a node status query on this

       -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.

           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

           Print a summary of command line options.

           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.

           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.

           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.

           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.

           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.

           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

           IP address .... NetBIOS name

           pair that is the normal output.

           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.

           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.

       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.

       This man page is correct for version 3 of the Samba suite.

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

       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.

       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
       updated 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
       DocBook XML 4.2 for Samba 3.0 was done by Alexander Bokovoy.

Samba 4.7                         01/25/2022                      NMBLOOKUP(1)
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