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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 ]
[-U ] [-d ]
[-s ] [-i ] [-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
running a WINS server and the user wishes to query the names in
the WINS server. If this bit is unset the normal (broadcast re-
sponding) 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 priv-
ilege 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
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
This specifies a NetBIOS scope that nmblookup will use to com-
municate 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
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
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
The file specified contains the configuration details required
by the server. The information in this file includes serv-
er-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 config-
uration 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
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.
-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.
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 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 '#' 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
DocBook XML 4.2 for Samba 3.0 was done by Alexander Bokovoy.
NMBLOOKUP(1)
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