1NMBLOOKUP(1) User Commands NMBLOOKUP(1)
2
6 nmblookup - NetBIOS over TCP/IP client used to lookup NetBIOS names
7
9 nmblookup [-M] [-R] [-S] [-r] [-A] [-h] [-B <broadcast address>]
10 [-U <unicast address>] [-d <debug level>] [-s <smb config file>]
11 [-i <NetBIOS scope>] [-T] [-f] {name}
12
14 This tool is part of the samba(7) suite.
15 nmblookup is used to query NetBIOS names and map them to IP addresses
17 in a network using NetBIOS over TCP/IP queries. The options allow the
18 name queries to be directed at a particular IP broadcast area or to a
19 particular machine. All queries are done over UDP.
20
22 -M
23 Searches for a master browser by looking up the NetBIOS name name
24 with a type of 0x1d. If
25 name is "-" then it does a lookup on the special name
26 __MSBROWSE__. Please note that in order to use the name "-", you
27 need to make sure "-" isn't parsed as an argument, e.g. use :
28 nmblookup -M -- -.
29 -R
31 Set the recursion desired bit in the packet to do a recursive
32 lookup. This is used when sending a name query to a machine running
33 a WINS server and the user wishes to query the names in the WINS
34 server. If this bit is unset the normal (broadcast responding)
35 NetBIOS processing code on a machine is used instead. See RFC1001,
36 RFC1002 for details.
37 -S
39 Once the name query has returned an IP address then do a node
40 status query as well. A node status query returns the NetBIOS names
41 registered by a host.
42 -r
44 Try and bind to UDP port 137 to send and receive UDP datagrams. The
45 reason for this option is a bug in Windows 95 where it ignores the
46 source port of the requesting packet and only replies to UDP port
47 137. Unfortunately, on most UNIX systems root privilege is needed
48 to bind to this port, and in addition, if the nmbd(8) daemon is
49 running on this machine it also binds to this port.
50 -A
52 Interpret name as an IP Address and do a node status query on this
53 address.
54 -n|--netbiosname <primary NetBIOS name>
56 This option allows you to override the NetBIOS name that Samba uses
57 for itself. This is identical to setting the netbios name parameter
58 in the smb.conf file. However, a command line setting will take
59 precedence over settings in smb.conf.
60 -i|--scope <scope>
62 This specifies a NetBIOS scope that nmblookup will use to
63 communicate with when generating NetBIOS names. For details on the
64 use of NetBIOS scopes, see rfc1001.txt and rfc1002.txt. NetBIOS
65 scopes are very rarely used, only set this parameter if you are the
66 system administrator in charge of all the NetBIOS systems you
67 communicate with.
68 -W|--workgroup=domain
70 Set the SMB domain of the username. This overrides the default
71 domain which is the domain defined in smb.conf. If the domain
72 specified is the same as the servers NetBIOS name, it causes the
73 client to log on using the servers local SAM (as opposed to the
74 Domain SAM).
75 -O|--socket-options socket options
77 TCP socket options to set on the client socket. See the socket
78 options parameter in the smb.conf manual page for the list of valid
79 options.
80 -?|--help
82 Print a summary of command line options.
83 -B <broadcast address>
85 Send the query to the given broadcast address. Without this option
86 the default behavior of nmblookup is to send the query to the
87 broadcast address of the network interfaces as either auto-detected
88 or defined in the interfaces parameter of the smb.conf(5) file.
89 -U <unicast address>
91 Do a unicast query to the specified address or host unicast
92 address. This option (along with the -R option) is needed to query
93 a WINS server.
94 -d|--debuglevel=level
96 level is an integer from 0 to 10. The default value if this
97 parameter is not specified is 0.
98 The higher this value, the more detail will be logged to the log
100 files about the activities of the server. At level 0, only critical
101 errors and serious warnings will be logged. Level 1 is a reasonable
102 level for day-to-day running - it generates a small amount of
103 information about operations carried out.
104 Levels above 1 will generate considerable amounts of log data, and
106 should only be used when investigating a problem. Levels above 3
107 are designed for use only by developers and generate HUGE amounts
108 of log data, most of which is extremely cryptic.
109 Note that specifying this parameter here will override the log
111 level parameter in the smb.conf file.
112 -V|--version
114 Prints the program version number.
115 -s|--configfile <configuration file>
117 The file specified contains the configuration details required by
118 the server. The information in this file includes server-specific
119 information such as what printcap file to use, as well as
120 descriptions of all the services that the server is to provide. See
121 smb.conf for more information. The default configuration file name
122 is determined at compile time.
123 -l|--log-basename=logdirectory
125 Base directory name for log/debug files. The extension ".progname"
126 will be appended (e.g. log.smbclient, log.smbd, etc...). The log
127 file is never removed by the client.
128 -T
130 This causes any IP addresses found in the lookup to be looked up
131 via a reverse DNS lookup into a DNS name, and printed out before
132 each
133 IP address .... NetBIOS name
135 pair that is the normal output.
137 -f
139 Show which flags apply to the name that has been looked up.
140 Possible answers are zero or more of: Response, Authoritative,
141 Truncated, Recursion_Desired, Recursion_Available, Broadcast.
142 name
144 This is the NetBIOS name being queried. Depending upon the previous
145 options this may be a NetBIOS name or IP address. If a NetBIOS name
146 then the different name types may be specified by appending
147 '#<type>' to the name. This name may also be '*', which will return
148 all registered names within a broadcast area.
149
151 nmblookup can be used to query a WINS server (in the same way nslookup
152 is used to query DNS servers). To query a WINS server, nmblookup must
153 be called like this:
154 nmblookup -U server -R 'name'
156 For example, running :
158 nmblookup -U samba.org -R 'IRIX#1B'
160 would query the WINS server samba.org for the domain master browser (1B
162 name type) for the IRIX workgroup.
163
165 This man page is correct for version 3 of the Samba suite.
166
168 nmbd(8), samba(7), and smb.conf(5).
169
171 The original Samba software and related utilities were created by
172 Andrew Tridgell. Samba is now developed by the Samba Team as an Open
173 Source project similar to the way the Linux kernel is developed.
174 The original Samba man pages were written by Karl Auer. The man page
176 sources were converted to YODL format (another excellent piece of Open
177 Source software, available at ftp://ftp.icce.rug.nl/pub/unix/) and
178 updated for the Samba 2.0 release by Jeremy Allison. The conversion to
179 DocBook for Samba 2.2 was done by Gerald Carter. The conversion to
180 DocBook XML 4.2 for Samba 3.0 was done by Alexander Bokovoy.
181Samba 3.6 04/11/2016 NMBLOOKUP(1)