'\" t .\" Title: nmblookup .\" Author: [see the "AUTHOR" section] .\" Generator: DocBook XSL Stylesheets v1.79.1 .\" Date: 08/09/2022 .\" Manual: User Commands .\" Source: Samba 4.16.4 .\" Language: English .\" .TH "NMBLOOKUP" "1" "08/09/2022" "Samba 4\&.16\&.4" "User Commands" .\" ----------------------------------------------------------------- .\" * Define some portability stuff .\" ----------------------------------------------------------------- .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .\" http://bugs.debian.org/507673 .\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .ie \n(.g .ds Aq \(aq .el .ds Aq ' .\" ----------------------------------------------------------------- .\" * set default formatting .\" ----------------------------------------------------------------- .\" disable hyphenation .nh .\" disable justification (adjust text to left margin only) .ad l .\" ----------------------------------------------------------------- .\" * MAIN CONTENT STARTS HERE * .\" ----------------------------------------------------------------- .SH "NAME" nmblookup \- NetBIOS over TCP/IP client used to lookup NetBIOS names .SH "SYNOPSIS" .HP \w'\ 'u nmblookup [\-M|\-\-master\-browser] [\-\-recursion] [\-S|\-\-status] [\-r|\-\-root\-port] [\-A|\-\-lookup\-by\-ip] [\-B|\-\-broadcast=BROADCAST\-ADDRESS] [\-U|\-\-unicast=UNICAST\-ADDRESS] [\-T|\-\-translate] [\-f|\-\-flags] [\-?|\-\-help] [\-\-usage] [\-d|\-\-debuglevel=DEBUGLEVEL] [\-\-debug\-stdout] [\-\-configfile=CONFIGFILE] [\-\-option=name=value] [\-l|\-\-log\-basename=LOGFILEBASE] [\-\-leak\-report] [\-\-leak\-report\-full] [\-R|\-\-name\-resolve=NAME\-RESOLVE\-ORDER] [\-O|\-\-socket\-options=SOCKETOPTIONS] [\-m|\-\-max\-protocol=MAXPROTOCOL] [\-n|\-\-netbiosname=NETBIOSNAME] [\-\-netbios\-scope=SCOPE] [\-W|\-\-workgroup=WORKGROUP] [\-\-realm=REALM] {name} .SH "DESCRIPTION" .PP This tool is part of the \fBsamba\fR(7) suite\&. .PP 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\&. .SH "OPTIONS" .PP \-M|\-\-master\-browser .RS 4 Searches for a master browser by looking up the NetBIOS \fIname\fR with a type of \fB0x1d\fR\&. If \fI name\fR is "\-" then it does a lookup on the special name \fB__MSBROWSE__\fR\&. Please note that in order to use the name "\-", you need to make sure "\-" isn\*(Aqt parsed as an argument, e\&.g\&. use : \fBnmblookup \-M \-\- \-\fR\&. .RE .PP \-\-recursion .RS 4 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\&. .RE .PP \-S|\-\-status .RS 4 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\&. .RE .PP \-r|\-\-root\-port .RS 4 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 \fBnmbd\fR(8) daemon is running on this machine it also binds to this port\&. .RE .PP \-A|\-\-lookup\-by\-ip .RS 4 Interpret \fIname\fR as an IP Address and do a node status query on this address\&. .RE .PP \-B|\-\-broadcast .RS 4 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 \fIinterfaces\fR parameter of the \fBsmb.conf\fR(5) file\&. .RE .PP \-U|\-\-unicast .RS 4 Do a unicast query to the specified address or host \fIunicast address\fR\&. This option (along with the \fI\-R\fR option) is needed to query a WINS server\&. .RE .PP \-T|\-\-translate .RS 4 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 .sp \fIIP address \&.\&.\&.\&. NetBIOS name\fR .sp pair that is the normal output\&. .RE .PP \-f|\-\-flags .RS 4 Show which flags apply to the name that has been looked up\&. Possible answers are zero or more of: Response, Authoritative, Truncated, Recursion_Desired, Recursion_Available, Broadcast\&. .RE .PP name .RS 4 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 \*(Aq#\*(Aq to the name\&. This name may also be \*(Aq*\*(Aq, which will return all registered names within a broadcast area\&. .RE .PP \-d|\-\-debuglevel=DEBUGLEVEL .RS 4 \fIlevel\fR is an integer from 0 to 10\&. The default value if this parameter is not specified is 1 for client applications\&. .sp The higher this value, the more detail will be logged to the log files about the activities of the server\&. At level 0, only critical errors and serious warnings will be logged\&. Level 1 is a reasonable level for day\-to\-day running \- it generates a small amount of information about operations carried out\&. .sp 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 log data, most of which is extremely cryptic\&. .sp Note that specifying this parameter here will override the \m[blue]\fBlog level\fR\m[] parameter in the smb\&.conf file\&. .RE .PP \-\-debug\-stdout .RS 4 This will redirect debug output to STDOUT\&. By default all clients are logging to STDERR\&. .RE .PP \-\-configfile= .RS 4 The file specified contains the configuration details required by the client\&. The information in this file can be general for client and server or only provide client specific like options such as \m[blue]\fBclient smb encrypt\fR\m[]\&. See smb\&.conf for more information\&. The default configuration file name is determined at compile time\&. .RE .PP \-\-option== .RS 4 Set the \fBsmb.conf\fR(5) option "" to value "" from the command line\&. This overrides compiled\-in defaults and options read from the configuration file\&. If a name or a value includes a space, wrap whole \-\-option=name=value into quotes\&. .RE .PP \-l|\-\-log\-basename=logdirectory .RS 4 Base directory name for log/debug files\&. The extension \fB"\&.progname"\fR will be appended (e\&.g\&. log\&.smbclient, log\&.smbd, etc\&.\&.\&.)\&. The log file is never removed by the client\&. .RE .PP \-\-leak\-report .RS 4 Enable talloc leak reporting on exit\&. .RE .PP \-\-leak\-report\-full .RS 4 Enable full talloc leak reporting on exit\&. .RE .PP \-V|\-\-version .RS 4 Prints the program version number\&. .RE .PP \-R|\-\-name\-resolve=NAME\-RESOLVE\-ORDER .RS 4 This option is used to determine what naming services and in what order to resolve host names to IP addresses\&. The option takes a space\-separated string of different name resolution options\&. The best ist to wrap the whole \-\-name\-resolve=NAME\-RESOLVE\-ORDER into quotes\&. .sp The options are: "lmhosts", "host", "wins" and "bcast"\&. They cause names to be resolved as follows: .RS .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} \fBlmhosts\fR: Lookup an IP address in the Samba lmhosts file\&. If the line in lmhosts has no name type attached to the NetBIOS name (see the \fBlmhosts\fR(5) for details) then any name type matches for lookup\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} \fBhost\fR: Do a standard host name to IP address resolution, using the system /etc/hosts, NIS, or DNS lookups\&. This method of name resolution is operating system dependent, for instance on IRIX or Solaris this may be controlled by the /etc/nsswitch\&.conf file)\&. Note that this method is only used if the NetBIOS name type being queried is the 0x20 (server) name type, otherwise it is ignored\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} \fBwins\fR: Query a name with the IP address listed in the \fIwins server\fR parameter\&. If no WINS server has been specified this method will be ignored\&. .RE .sp .RS 4 .ie n \{\ \h'-04'\(bu\h'+03'\c .\} .el \{\ .sp -1 .IP \(bu 2.3 .\} \fBbcast\fR: Do a broadcast on each of the known local interfaces listed in the \fIinterfaces\fR parameter\&. This is the least reliable of the name resolution methods as it depends on the target host being on a locally connected subnet\&. .RE .sp .RE If this parameter is not set then the name resolve order defined in the smb\&.conf file parameter (\m[blue]\fBname resolve order\fR\m[]) will be used\&. .sp The default order is lmhosts, host, wins, bcast\&. Without this parameter or any entry in the \m[blue]\fBname resolve order\fR\m[] parameter of the smb\&.conf file, the name resolution methods will be attempted in this order\&. .RE .PP \-O|\-\-socket\-options=SOCKETOPTIONS .RS 4 TCP socket options to set on the client socket\&. See the socket options parameter in the smb\&.conf manual page for the list of valid options\&. .RE .PP \-m|\-\-max\-protocol=MAXPROTOCOL .RS 4 The value of the parameter (a string) is the highest protocol level that will be supported by the client\&. .sp Note that specifying this parameter here will override the \m[blue]\fBclient max protocol\fR\m[] parameter in the smb\&.conf file\&. .RE .PP \-n|\-\-netbiosname=NETBIOSNAME .RS 4 This option allows you to override the NetBIOS name that Samba uses for itself\&. This is identical to setting the \m[blue]\fBnetbios name\fR\m[] parameter in the smb\&.conf file\&. However, a command line setting will take precedence over settings in smb\&.conf\&. .RE .PP \-\-netbios\-scope=SCOPE .RS 4 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 \fIvery\fR rarely used, only set this parameter if you are the system administrator in charge of all the NetBIOS systems you communicate with\&. .RE .PP \-W|\-\-workgroup=WORKGROUP .RS 4 Set the SMB domain of the username\&. This overrides the default domain which is the domain defined in smb\&.conf\&. If the domain specified is the same as the servers NetBIOS name, it causes the client to log on using the servers local SAM (as opposed to the Domain SAM)\&. .sp Note that specifying this parameter here will override the \m[blue]\fBworkgroup\fR\m[] parameter in the smb\&.conf file\&. .RE .PP \-r|\-\-realm=REALM .RS 4 Set the realm for the domain\&. .sp Note that specifying this parameter here will override the \m[blue]\fBrealm\fR\m[] parameter in the smb\&.conf file\&. .RE .PP \-?|\-\-help .RS 4 Print a summary of command line options\&. .RE .PP \-\-usage .RS 4 Display brief usage message\&. .RE .SH "EXAMPLES" .PP 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: .PP nmblookup \-U server \-R \*(Aqname\*(Aq .PP For example, running : .PP nmblookup \-U samba\&.org \-R \*(AqIRIX#1B\*(Aq .PP would query the WINS server samba\&.org for the domain master browser (1B name type) for the IRIX workgroup\&. .SH "VERSION" .PP This man page is part of version 4\&.16\&.4 of the Samba suite\&. .SH "SEE ALSO" .PP \fBnmbd\fR(8), \fBsamba\fR(7), and \fBsmb.conf\fR(5)\&. .SH "AUTHOR" .PP 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\&.