Provided by: samba-common-bin_4.18.6+dfsg-1ubuntu2.1_amd64 
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
/etc/samba/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 /etc/samba/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
/etc/samba/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 /etc/samba/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 /etc/samba/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 /etc/samba/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 /etc/samba/smb.conf file.
However, a command line setting will take precedence over settings in
/etc/samba/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
/etc/samba/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
/etc/samba/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 4.18.6-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.