1NMBLOOKUP(1) User Commands 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|--master-browser] [-R|--recursion] [-S|--status]
10 [-r|--root-port] [-A|--lookup-by-ip]
11 [-B|--broadcast <broadcast address>] [-U|--unicast <unicast address>]
12 [-d <debug level>] [-s <smb config file>] [-i <NetBIOS scope>]
13 [-T|--translate] [-f|--flags] {name}
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16 This tool is part of the samba(7) suite.
17 nmblookup is used to query NetBIOS names and map them to IP addresses
19 in a network using NetBIOS over TCP/IP queries. The options allow the
20 name queries to be directed at a particular IP broadcast area or to a
21 particular machine. All queries are done over UDP.
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24 -M|--master-browser
25 Searches for a master browser by looking up the NetBIOS name with a
26 type of 0x1d. If
27 name is "-" then it does a lookup on the special name
28 __MSBROWSE__. Please note that in order to use the name "-", you
29 need to make sure "-" isn't parsed as an argument, e.g. use :
30 nmblookup -M -- -.
31 -R|--recursion
33 Set the recursion desired bit in the packet to do a recursive
34 lookup. This is used when sending a name query to a machine running
35 a WINS server and the user wishes to query the names in the WINS
36 server. If this bit is unset the normal (broadcast responding)
37 NetBIOS processing code on a machine is used instead. See RFC1001,
38 RFC1002 for details.
39 -S|--status
41 Once the name query has returned an IP address then do a node
42 status query as well. A node status query returns the NetBIOS names
43 registered by a host.
44 -r|--root-port
46 Try and bind to UDP port 137 to send and receive UDP datagrams. The
47 reason for this option is a bug in Windows 95 where it ignores the
48 source port of the requesting packet and only replies to UDP port
49 137. Unfortunately, on most UNIX systems root privilege is needed
50 to bind to this port, and in addition, if the nmbd(8) daemon is
51 running on this machine it also binds to this port.
52 -A|--lookup-by-ip
54 Interpret name as an IP Address and do a node status query on this
55 address.
56 -n|--netbiosname <primary NetBIOS name>
58 This option allows you to override the NetBIOS name that Samba uses
59 for itself. This is identical to setting the netbios name parameter
60 in the smb.conf file. However, a command line setting will take
61 precedence over settings in smb.conf.
62 -i|--scope <scope>
64 This specifies a NetBIOS scope that nmblookup will use to
65 communicate with when generating NetBIOS names. For details on the
66 use of NetBIOS scopes, see rfc1001.txt and rfc1002.txt. NetBIOS
67 scopes are very rarely used, only set this parameter if you are the
68 system administrator in charge of all the NetBIOS systems you
69 communicate with.
70 -W|--workgroup=domain
72 Set the SMB domain of the username. This overrides the default
73 domain which is the domain defined in smb.conf. If the domain
74 specified is the same as the servers NetBIOS name, it causes the
75 client to log on using the servers local SAM (as opposed to the
76 Domain SAM).
77 -O|--socket-options socket options
79 TCP socket options to set on the client socket. See the socket
80 options parameter in the smb.conf manual page for the list of valid
81 options.
82 -?|--help
84 Print a summary of command line options.
85 --usage
87 Display brief usage message.
88 -B|--broadcast <broadcast address>
90 Send the query to the given broadcast address. Without this option
91 the default behavior of nmblookup is to send the query to the
92 broadcast address of the network interfaces as either auto-detected
93 or defined in the interfaces parameter of the smb.conf(5) file.
94 -U|--unicast <unicast address>
96 Do a unicast query to the specified address or host unicast
97 address. This option (along with the -R option) is needed to query
98 a WINS server.
99 -d|--debuglevel=level
101 level is an integer from 0 to 10. The default value if this
102 parameter is not specified is 0.
103 The higher this value, the more detail will be logged to the log
105 files about the activities of the server. At level 0, only critical
106 errors and serious warnings will be logged. Level 1 is a reasonable
107 level for day-to-day running - it generates a small amount of
108 information about operations carried out.
109 Levels above 1 will generate considerable amounts of log data, and
111 should only be used when investigating a problem. Levels above 3
112 are designed for use only by developers and generate HUGE amounts
113 of log data, most of which is extremely cryptic.
114 Note that specifying this parameter here will override the log
116 level parameter in the smb.conf file.
117 -V|--version
119 Prints the program version number.
120 -s|--configfile=<configuration file>
122 The file specified contains the configuration details required by
123 the server. The information in this file includes server-specific
124 information such as what printcap file to use, as well as
125 descriptions of all the services that the server is to provide. See
126 smb.conf for more information. The default configuration file name
127 is determined at compile time.
128 -l|--log-basename=logdirectory
130 Base directory name for log/debug files. The extension ".progname"
131 will be appended (e.g. log.smbclient, log.smbd, etc...). The log
132 file is never removed by the client.
133 --option=<name>=<value>
135 Set the smb.conf(5) option "<name>" to value "<value>" from the
136 command line. This overrides compiled-in defaults and options read
137 from the configuration file.
138 -T|--translate
140 This causes any IP addresses found in the lookup to be looked up
141 via a reverse DNS lookup into a DNS name, and printed out before
142 each
143 IP address .... NetBIOS name
145 pair that is the normal output.
147 -f|--flags
149 Show which flags apply to the name that has been looked up.
150 Possible answers are zero or more of: Response, Authoritative,
151 Truncated, Recursion_Desired, Recursion_Available, Broadcast.
152 name
154 This is the NetBIOS name being queried. Depending upon the previous
155 options this may be a NetBIOS name or IP address. If a NetBIOS name
156 then the different name types may be specified by appending
157 '#<type>' to the name. This name may also be '*', which will return
158 all registered names within a broadcast area.
159
161 nmblookup can be used to query a WINS server (in the same way nslookup
162 is used to query DNS servers). To query a WINS server, nmblookup must
163 be called like this:
164 nmblookup -U server -R 'name'
166 For example, running :
168 nmblookup -U samba.org -R 'IRIX#1B'
170 would query the WINS server samba.org for the domain master browser (1B
172 name type) for the IRIX workgroup.
173
175 This man page is part of version 4.11.4 of the Samba suite.
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178 nmbd(8), samba(7), and smb.conf(5).
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181 The original Samba software and related utilities were created by
182 Andrew Tridgell. Samba is now developed by the Samba Team as an Open
183 Source project similar to the way the Linux kernel is developed.
184Samba 4.11.4 12/16/2019 NMBLOOKUP(1)