NAME

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

SYNOPSIS

       nmblookup [-M|--master-browser] [--recursion] [-S|--status] [-r|--root-port]
        [-A|--lookup-by-ip] [-B|--broadcast=BROADCAST-ADDRESS] [-U|--unicast=UNICAST-ADDRESS]
        [-T|--translate] [-f|--flags] [-?|--help] [--usage] [-d|--debuglevel=DEBUGLEVEL]
        [--debug-stdout] [--configfile=CONFIGFILE] [--option=name=value]
        [-l|--log-basename=LOGFILEBASE] [--leak-report] [--leak-report-full]
        [-R|--name-resolve=NAME-RESOLVE-ORDER] [-O|--socket-options=SOCKETOPTIONS]
        [-m|--max-protocol=MAXPROTOCOL] [-n|--netbiosname=NETBIOSNAME] [--netbios-scope=SCOPE]
        [-W|--workgroup=WORKGROUP] [--realm=REALM] {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 -- -.

       --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.

       -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.

       -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.

       -d|--debuglevel=DEBUGLEVEL
           level is an integer from 0 to 10. The default value if this parameter is not specified
           is 1 for client applications.

           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.

       --debug-stdout
           This will redirect debug output to STDOUT. By default all clients are logging to
           STDERR.

       --configfile=<configuration file>
           The file specified contains the configuration details required by the client. The
           information in this file can be general for client and server or only provide client
           specific like options such as client smb encrypt. See smb.conf for more information.
           The default configuration file name is determined at compile time.

       --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. If a name
           or a value includes a space, wrap whole --option=name=value into quotes.

       -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.

       --leak-report
           Enable talloc leak reporting on exit.

       --leak-report-full
           Enable full talloc leak reporting on exit.

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

       -R|--name-resolve=NAME-RESOLVE-ORDER
           This option is used to determine what naming services and in what order to resolve
           host names to IP addresses. The option takes a space-separated string of different
           name resolution options. The best ist to wrap the whole
           --name-resolve=NAME-RESOLVE-ORDER into quotes.

           The options are: "lmhosts", "host", "wins" and "bcast". They cause names to be
           resolved as follows:

                  •   lmhosts: Lookup an IP address in the Samba lmhosts file. If the line in
                      lmhosts has no name type attached to the NetBIOS name (see the lmhosts(5)
                      for details) then any name type matches for lookup.

                  •   host: Do a standard host name to IP address resolution, using the system
                      /etc/hosts, NIS, or DNS lookups. This method of name resolution is
                      operating system dependent, for instance on IRIX or Solaris this may be
                      controlled by the /etc/nsswitch.conf file). Note that this method is only
                      used if the NetBIOS name type being queried is the 0x20 (server) name type,
                      otherwise it is ignored.

                  •   wins: Query a name with the IP address listed in the wins server parameter.
                      If no WINS server has been specified this method will be ignored.

                  •   bcast: Do a broadcast on each of the known local interfaces listed in the
                      interfaces parameter. This is the least reliable of the name resolution
                      methods as it depends on the target host being on a locally connected
                      subnet.

           If this parameter is not set then the name resolve order defined in the smb.conf file
           parameter (name resolve order) will be used.

           The default order is lmhosts, host, wins, bcast. Without this parameter or any entry
           in the name resolve order parameter of the smb.conf file, the name resolution methods
           will be attempted in this order.

       -O|--socket-options=SOCKETOPTIONS
           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.

       -m|--max-protocol=MAXPROTOCOL
           The value of the parameter (a string) is the highest protocol level that will be
           supported by the client.

           Note that specifying this parameter here will override the client max protocol
           parameter in the smb.conf file.

       -n|--netbiosname=NETBIOSNAME
           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.

       --netbios-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=WORKGROUP
           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).

           Note that specifying this parameter here will override the workgroup parameter in the
           smb.conf file.

       -r|--realm=REALM
           Set the realm for the domain.

           Note that specifying this parameter here will override the realm parameter in the
           smb.conf file.

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

       --usage
           Display brief usage message.

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 4.15.13-Ubuntu 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.