1NMBLOOKUP(1) NMBLOOKUP(1)
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6 nmblookup - NetBIOS over TCP/IP client used to lookup NetBIOS names
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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}
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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 __MSBROWSE__.
26 Please note that in order to use the name "-", you need to make sure
27 "-" isn't parsed as an argument, e.g. use : nmblookup -M -- -.
28 -R
30 Set the recursion desired bit in the packet to do a recursive
31 lookup. This is used when sending a name query to a machine running
32 a WINS server and the user wishes to query the names in the WINS
33 server. If this bit is unset the normal (broadcast responding) Net‐
34 BIOS processing code on a machine is used instead. See RFC1001,
35 RFC1002 for details.
36 -S
38 Once the name query has returned an IP address then do a node status
39 query as well. A node status query returns the NetBIOS names regis‐
40 tered by a host.
41 -r
43 Try and bind to UDP port 137 to send and receive UDP datagrams. The
44 reason for this option is a bug in Windows 95 where it ignores the
45 source port of the requesting packet and only replies to UDP port
46 137. Unfortunately, on most UNIX systems root privilege is needed to
47 bind to this port, and in addition, if the nmbd(8) daemon is running
48 on this machine it also binds to this port.
49 -A
51 Interpret name as an IP Address and do a node status query on this
52 address.
53 -n <primary NetBIOS name>
55 This option allows you to override the NetBIOS name that Samba uses
56 for itself. This is identical to setting the
57 parameter in the smb.conf file. However, a command line setting will
59 take precedence over settings in smb.conf.
60 -i <scope>
62 This specifies a NetBIOS scope that nmblookup will use to communi‐
63 cate with when generating NetBIOS names. For details on the use of
64 NetBIOS scopes, see rfc1001.txt and rfc1002.txt. NetBIOS scopes are
65 very rarely used, only set this parameter if you are the system
66 administrator in charge of all the NetBIOS systems you communicate
67 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 speci‐
72 fied is the same as the servers NetBIOS name, it causes the client
73 to log on using the servers local SAM (as opposed to the Domain
74 SAM).
75 -O 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 -h|--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 broad‐
87 cast address of the network interfaces as either auto-detected or
88 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 address.
92 This option (along with the -R option) is needed to query a WINS
93 server.
94 -V
96 Prints the program version number.
97 -s <configuration file>
99 The file specified contains the configuration details required by
100 the server. The information in this file includes server-specific
101 information such as what printcap file to use, as well as descrip‐
102 tions of all the services that the server is to provide. See
103 smb.conf for more information. The default configuration file name
104 is determined at compile time.
105 -d|--debuglevel=level
107 level is an integer from 0 to 10. The default value if this parame‐
108 ter is not specified is zero.
109 The higher this value, the more detail will be logged to the log
111 files about the activities of the server. At level 0, only critical
112 errors and serious warnings will be logged. Level 1 is a reasonable
113 level for day-to-day running - it generates a small amount of infor‐
114 mation about operations carried out.
115 Levels above 1 will generate considerable amounts of log data, and
117 should only be used when investigating a problem. Levels above 3 are
118 designed for use only by developers and generate HUGE amounts of log
119 data, most of which is extremely cryptic.
120 Note that specifying this parameter here will override the
122 parameter in the smb.conf file.
124 -l|--logfile=logdirectory
126 Base directory name for log/debug files. The extension ".progname"
127 will be appended (e.g. log.smbclient, log.smbd, etc...). The log
128 file is never removed by the client.
129 -T
131 This causes any IP addresses found in the lookup to be looked up via
132 a reverse DNS lookup into a DNS name, and printed out before 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. Possible
140 answers are zero or more of: Response, Authoritative, Truncated,
141 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.
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165 This man page is correct for version 3.0 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 Doc‐
180 Book XML 4.2 for Samba 3.0 was done by Alexander Bokovoy.
181 NMBLOOKUP(1)