NMBLOOKUP(1) UNIX System V (19 November 2002) NMBLOOKUP(1)
NAME [Toc] [Back]
nmblookup - NetBIOS over TCP/IP client used to lookup
NetBIOS names
SYNOPSIS [Toc] [Back]
nmblookup [ -f ] [ -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 [Toc] [Back]
This tool is part of the Samba 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 [Toc] [Back]
-f Causes nmblookup to print out the flags in the NMB
packet headers. These flags will print out as strings
like Authoritative, Recursion_Desired,
Recursion_available, etc.
-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 responding) 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 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 Interpret name as an IP Address and do a node status
query on this address.
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NMBLOOKUP(1) UNIX System V (19 November 2002) NMBLOOKUP(1)
-h Print a help (usage) message.
-B <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 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 specified 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 investigating 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 override
the log level parameter in the smb.conf(5) file.
-s <smb.conf>
This parameter specifies the pathname to the Samba
configuration file, smb.conf(5) This file controls 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
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NMBLOOKUP(1) UNIX System V (19 November 2002) NMBLOOKUP(1)
IP address .... NetBIOS name
pair that is the normal output.
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.
EXAMPLES [Toc] [Back]
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 [Toc] [Back]
This man page is correct for version 2.2 of the Samba suite.
SEE ALSO [Toc] [Back]
nmbd(8) samba(7) and smb.conf(5)
AUTHOR [Toc] [Back]
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/
<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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