nmblookup - NetBIOS over TCP/IP client used to lookup Net
BIOS names
SYNOPSIS
nmblookup [ -M ] [ -R ] [ -S ] [ -r ] [ -A ] [ -h ]
[ -B <broadcast address> ] [ -U <unicast address> ] [ -d
<debug level> ] [ -s <smb config file> ] [ -i <NetBIOS
scope> ] [ -T ] name
DESCRIPTION
This tool is part of the Sambasuite.
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__.
-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 respond
ing) 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 ignores 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 addi
tion, 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 sta
tus query on this address.
-h Print a help (usage) message.
-B <broadcast address>
Send the query to the given broadcast address.
Without this option the default behavior of
address of the network interfaces as either auto-
detected or defined in the interfaces parameter of
the smb.conf (5) file.
-U <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>
debuglevel is an integer from 0 to 10.
The default value if this parameter is not speci
fied is zero.
The higher this value, the more detail will be
logged about the activities of nmblookup. At level
0, only critical errors and serious warnings will
be logged.
Levels above 1 will generate considerable amounts
of log data, and should only be used when investi
gating a problem. Levels above 3 are designed for
use only by developers and generate HUGE amounts of
data, most of which is extremely cryptic.
Note that specifying this parameter here will over
ride the log levelparameter in the smb.conf(5)
file.
-s <smb.conf>
This parameter specifies the pathname to the Samba
configuration file, smb.conf(5). This file con
trols all aspects of the Samba setup on the
machine.
-i <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.
-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.
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 mas
ter browser (1B name type) for the IRIX workgroup.
VERSION
This man page is correct for version 2.2 of the Samba
suite.
SEE ALSO
nmbd(8), samba(7)
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.
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, avail
able at ftp://ftp.icce.rug.nl/pub/unix/
<URL: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
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