diff options
| -rw-r--r-- | usr.sbin/bind/bin/dig/dig.1 | 1621 | ||||
| -rw-r--r-- | usr.sbin/bind/bin/dig/host.1 | 468 | ||||
| -rw-r--r-- | usr.sbin/bind/bin/dig/nslookup.1 | 473 |
3 files changed, 1343 insertions, 1219 deletions
diff --git a/usr.sbin/bind/bin/dig/dig.1 b/usr.sbin/bind/bin/dig/dig.1 index feb036d0ce4..8aea31ed0bf 100644 --- a/usr.sbin/bind/bin/dig/dig.1 +++ b/usr.sbin/bind/bin/dig/dig.1 @@ -1,9 +1,11 @@ +.\" $OpenBSD: dig.1,v 1.13 2019/12/17 16:41:26 jsg Exp $ +.\" .\" Copyright (C) 2000-2011, 2013-2018 Internet Systems Consortium, Inc. ("ISC") -.\" +.\" .\" Permission to use, copy, modify, and/or distribute this software for any .\" purpose with or without fee is hereby granted, provided that the above .\" copyright notice and this permission notice appear in all copies. -.\" +.\" .\" THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH .\" REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY .\" AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, @@ -12,779 +14,978 @@ .\" OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR .\" PERFORMANCE OF THIS SOFTWARE. .\" -.hy 0 -.ad l -'\" t -.\" Title: dig -.\" Author: -.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/> -.\" Date: 2014-02-19 -.\" Manual: BIND9 -.\" Source: ISC -.\" Language: English -.\" -.TH "DIG" "1" "2014\-02\-19" "ISC" "BIND9" -.\" ----------------------------------------------------------------- -.\" * 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" -dig \- DNS lookup utility -.SH "SYNOPSIS" -.HP \w'\fBdig\fR\ 'u -\fBdig\fR [@server] [\fB\-b\ \fR\fB\fIaddress\fR\fR] [\fB\-c\ \fR\fB\fIclass\fR\fR] [\fB\-f\ \fR\fB\fIfilename\fR\fR] [\fB\-k\ \fR\fB\fIfilename\fR\fR] [\fB\-m\fR] [\fB\-p\ \fR\fB\fIport#\fR\fR] [\fB\-q\ \fR\fB\fIname\fR\fR] [\fB\-t\ \fR\fB\fItype\fR\fR] [\fB\-v\fR] [\fB\-x\ \fR\fB\fIaddr\fR\fR] [\fB\-y\ \fR\fB\fI[hmac:]\fR\fIname:key\fR\fR] [[\fB\-4\fR] | [\fB\-6\fR]] [name] [type] [class] [queryopt...] -.HP \w'\fBdig\fR\ 'u -\fBdig\fR [\fB\-h\fR] -.HP \w'\fBdig\fR\ 'u -\fBdig\fR [global\-queryopt...] [query...] -.SH "DESCRIPTION" -.PP -\fBdig\fR -is a flexible tool for interrogating DNS name servers\&. It performs DNS lookups and displays the answers that are returned from the name server(s) that were queried\&. Most DNS administrators use -\fBdig\fR -to troubleshoot DNS problems because of its flexibility, ease of use and clarity of output\&. Other lookup tools tend to have less functionality than -\fBdig\fR\&. -.PP +.Dd $Mdocdate: December 17 2019 $ +.Dt DIG 1 +.Os +.Sh NAME +.Nm dig +.Nd DNS lookup utility +.Sh SYNOPSIS +.Nm +.Op Ar @server +.Op Fl b Ar address +.Op Fl c Ar class +.Op Fl f Ar filename +.Op Fl k Ar filename +.Op Fl m +.Op Fl p Ar port# +.Op Fl q Ar name +.Op Fl t Ar type +.Op Fl v +.Op Fl x Ar addr +.Op Fl y Ar hmac:name:key +.Op Oo Fl 4 Oc | Oo Fl 6 Oc +.Op Ar name +.Op Ar type +.Op Ar class +.Op Ar queryopt ... +.Nm +.Op Fl h +.Nm +.Op Ar global-queryopt ... +.Op Ar query ... +.Sh DESCRIPTION +The +.Nm +command is a flexible tool for interrogating DNS name servers. +It performs DNS lookups and displays the answers that are returned from the name +server(s) that were queried. +Most DNS administrators use +.Nm +to troubleshoot DNS problems because of its flexibility, ease of use and clarity +of output. +Other lookup tools tend to have less functionality than +.Nm . +.Pp Although -\fBdig\fR -is normally used with command\-line arguments, it also has a batch mode of operation for reading lookup requests from a file\&. A brief summary of its command\-line arguments and options is printed when the -\fB\-h\fR -option is given\&. Unlike earlier versions, the BIND 9 implementation of -\fBdig\fR -allows multiple lookups to be issued from the command line\&. -.PP +.Nm +is normally used with command-line arguments, it also has a batch mode of +operation for reading lookup requests from a file. +A brief summary of its command-line arguments and options is printed when the +.Fl h +option is given. +Unlike earlier versions, the BIND 9 implementation of +.Nm +allows multiple lookups to be issued from the command line. +.Pp Unless it is told to query a specific name server, -\fBdig\fR +.Nm will try each of the servers listed in -/etc/resolv\&.conf\&. If no usable server addresses are found, -\fBdig\fR -will send the query to the local host\&. -.PP +.Pa /etc/resolv.conf . +If no usable server addresses are found, +.Nm +will send the query to the local host. +.Pp When no command line arguments or options are given, -\fBdig\fR -will perform an NS query for "\&." (the root)\&. -.PP -It is possible to set per\-user defaults for -\fBdig\fR +.Nm +will perform an NS query for "." (the root). +.Pp +It is possible to set per-user defaults for +.Nm via -${HOME}/\&.digrc\&. This file is read and any options in it are applied before the command line arguments\&. -.PP -The IN and CH class names overlap with the IN and CH top level domain names\&. Either use the -\fB\-t\fR +.Pa ${HOME}/.digrc . +This file is read and any options in it are applied before the command line +arguments. +.Pp +The IN and CH class names overlap with the IN and CH top level domain names. +Either use the +.Fl t and -\fB\-c\fR +.Fl c options to specify the type and class, use the -\fB\-q\fR -the specify the domain name, or use "IN\&." and "CH\&." when looking up these top level domains\&. -.SH "SIMPLE USAGE" -.PP +.Fl q +the specify the domain name, or use "IN." and "CH." when looking up these top +level domains. +.Sh SIMPLE USAGE A typical invocation of -\fBdig\fR +.Nm looks like: -.sp -.if n \{\ -.RS 4 -.\} -.nf - dig @server name type -.fi -.if n \{\ -.RE -.\} -.sp +.Bd -literal -offset indent +dig @server name type +.Ed +.Pp where: -.PP -\fBserver\fR -.RS 4 -is the name or IP address of the name server to query\&. This can be an IPv4 address in dotted\-decimal notation or an IPv6 address in colon\-delimited notation\&. When the supplied -\fIserver\fR +.Bl -tag -width Ds +.It Ar server +is the name or IP address of the name server to query. +This can be an IPv4 address in dotted-decimal notation or an IPv6 address in +colon-delimited notation. +When the supplied +.Ar server argument is a hostname, -\fBdig\fR -resolves that name before querying that name server\&. -.sp +.Nm +resolves that name before querying that name server. +.Pp If no -\fIserver\fR +.Ar server argument is provided, -\fBdig\fR +.Nm consults -/etc/resolv\&.conf; if an address is found there, it queries the name server at that address\&. If either of the -\fB\-4\fR +.Pa /etc/resolv.conf ; +if an address is found there, it queries the name server at that address. +If either of the +.Fl 4 or -\fB\-6\fR -options are in use, then only addresses for the corresponding transport will be tried\&. If no usable addresses are found, -\fBdig\fR -will send the query to the local host\&. The reply from the name server that responds is displayed\&. -.RE -.PP -\fBname\fR -.RS 4 -is the name of the resource record that is to be looked up\&. -.RE -.PP -\fBtype\fR -.RS 4 -indicates what type of query is required \(em ANY, A, MX, SIG, etc\&. -\fItype\fR -can be any valid query type\&. If no -\fItype\fR +.Fl 6 +options are in use, then only addresses for the corresponding transport will be +tried. +If no usable addresses are found, +.Nm +will send the query to the local host. +The reply from the name server that responds is displayed. +.It Ar name +is the name of the resource record that is to be looked up. +.It Ar type +indicates what type of query is required \(em ANY, A, MX, SIG, etc. +.Ar type +can be any valid query type. +If no +.Ar type argument is supplied, -\fBdig\fR -will perform a lookup for an A record\&. -.RE -.SH "OPTIONS" -.PP -\-4 -.RS 4 -Use IPv4 only\&. -.RE -.PP -\-6 -.RS 4 -Use IPv6 only\&. -.RE -.PP -\-b \fIaddress\fR\fI[#port]\fR -.RS 4 -Set the source IP address of the query\&. The -\fIaddress\fR -must be a valid address on one of the host\*(Aqs network interfaces, or "0\&.0\&.0\&.0" or "::"\&. An optional port may be specified by appending "#<port>" -.RE -.PP -\-c \fIclass\fR -.RS 4 -Set the query class\&. The default -\fIclass\fR -is IN; other classes are HS for Hesiod records or CH for Chaosnet records\&. -.RE -.PP -\-f \fIfile\fR -.RS 4 +.Nm +will perform a lookup for an A record. +.El +.Sh OPTIONS +.Bl -tag -width Ds +.It Fl 4 +Use IPv4 only. +.It Fl 6 +Use IPv6 only. +.It Fl b Ar address Ns Op #port +Set the source IP address of the query. +The +.Ar address +must be a valid address on one of the host's network interfaces, or +"0.0.0.0" or "::". An optional port may be specified by appending +"#<port>". +.It Fl c Ar class +Set the query class. +The default +.Ar class +is IN; other classes are HS for Hesiod records or CH for Chaosnet records. +.It Fl f Ar file Batch mode: -\fBdig\fR +.Nm reads a list of lookup requests to process from the given -\fIfile\fR\&. Each line in the file should be organized in the same way they would be presented as queries to -\fBdig\fR -using the command\-line interface\&. -.RE -.PP -\-i -.RS 4 -Do reverse IPv6 lookups using the obsolete RFC 1886 IP6\&.INT domain, which is no longer in use\&. Obsolete bit string label queries (RFC 2874) are not attempted\&. -.RE -.PP -\-k \fIkeyfile\fR -.RS 4 -Sign queries using TSIG using a key read from the given file\&. Key files can be generated using -\fBtsig-keygen\fR(8)\&. When using TSIG authentication with -\fBdig\fR, the name server that is queried needs to know the key and algorithm that is being used\&. In BIND, this is done by providing appropriate -\fBkey\fR +.Ar file . +Each line in the file should be organized in the same way they would be +presented as queries to +.Nm +using the command-line interface. +.It Fl i +Do reverse IPv6 lookups using the obsolete RFC 1886 IP6.INT domain, which is no +longer in use. +Obsolete bit string label queries (RFC 2874) are not attempted. +.It Fl k Ar keyfile +Sign queries using TSIG using a key read from the given file. +Key files can be generated using +.Xr tsig-keygen 8 . +When using TSIG authentication with +.Nm , +the name server that is queried needs to know the key and algorithm that is +being used. +In BIND, this is done by providing appropriate +.Nm key and -\fBserver\fR +.Nm server statements in -named\&.conf\&. -.RE -.PP -\-m -.RS 4 -Enable memory usage debugging\&. -.RE -.PP -\-p \fIport\fR -.RS 4 -Send the query to a non\-standard port on the server, instead of the defaut port 53\&. This option would be used to test a name server that has been configured to listen for queries on a non\-standard port number\&. -.RE -.PP -\-q \fIname\fR -.RS 4 -The domain name to query\&. This is useful to distinguish the -\fIname\fR -from other arguments\&. -.RE -.PP -\-t \fItype\fR -.RS 4 -The resource record type to query\&. It can be any valid query type\&. If it is a resource record type supported in BIND 9, it can be given by the type mnemonic (such as "NS" or "AAAA")\&. The default query type is "A", unless the -\fB\-x\fR -option is supplied to indicate a reverse lookup\&. A zone transfer can be requested by specifying a type of AXFR\&. When an incremental zone transfer (IXFR) is required, set the -\fItype\fR +.Pa named.conf . +.It Fl m +Enable memory usage debugging. +.It Fl p Ar port +Send the query to a non-standard port on the server, instead of the defaut port +53. +This option would be used to test a name server that has been configured to +listen for queries on a non-standard port number. +.It Fl q Ar name +The domain name to query. +This is useful to distinguish the +.Ar name +from other arguments. +.It Fl t Ar type +The resource record type to query. +It can be any valid query type. +If it is a resource record type supported in BIND 9, it can be given by the +type mnemonic (such as "NS" or "AAAA"). +The default query type is "A", unless the +.Fl x +option is supplied to indicate a reverse lookup. +A zone transfer can be requested by specifying a type of AXFR. +When an incremental zone transfer (IXFR) is required, set the +.Ar type to -ixfr=N\&. The incremental zone transfer will contain the changes made to the zone since the serial number in the zone\*(Aqs SOA record was -\fIN\fR\&. -.sp -All resource record types can be expressed as "TYPEnn", where "nn" is the number of the type\&. If the resource record type is not supported in BIND 9, the result will be displayed as described in RFC 3597\&. -.RE -.PP -\-u -.RS 4 -Print query times in microseconds instead of milliseconds\&. -.RE -.PP -\-v -.RS 4 -Print the version number and exit\&. -.RE -.PP -\-x \fIaddr\fR -.RS 4 -Simplified reverse lookups, for mapping addresses to names\&. The -\fIaddr\fR -is an IPv4 address in dotted\-decimal notation, or a colon\-delimited IPv6 address\&. When the -\fB\-x\fR +.Ar ixfr=N . +The incremental zone transfer will contain the changes made to the zone since +the serial number in the zone's SOA record was +.Ar N . +.Pp +All resource record types can be expressed as "TYPEnn", where +"nn" is the number of the type. +If the resource record type is not supported in BIND 9, the result will be +displayed as described in RFC 3597. +.It Fl u +Print query times in microseconds instead of milliseconds. +.It Fl v +Print the version number and exit. +.It Fl x Ar addr +Simplified reverse lookups, for mapping addresses to names. +The +.Ar addr +is an IPv4 address in dotted-decimal notation, or a colon-delimited IPv6 +address. +When the +.Fl x is used, there is no need to provide the -\fIname\fR, -\fIclass\fR +.Ar name , +.Ar class and -\fItype\fR -arguments\&. -\fBdig\fR +.Ar type +arguments. +.Nm automatically performs a lookup for a name like -94\&.2\&.0\&.192\&.in\-addr\&.arpa -and sets the query type and class to PTR and IN respectively\&. IPv6 addresses are looked up using nibble format under the IP6\&.ARPA domain (but see also the -\fB\-i\fR -option)\&. -.RE -.PP -\-y \fI[hmac:]\fR\fIkeyname:secret\fR -.RS 4 -Sign queries using TSIG with the given authentication key\&. -\fIkeyname\fR +.Ql 94.2.0.192.in-addr.arpa +and sets the query type and class to PTR and IN respectively. +IPv6 addresses are looked up using nibble format under the IP6.ARPA domain +(but see also the +.Fl i +option). +.It Fl y Xo +.Op Ar hmac Ns Cm : Ns +.Ar keyname Ns Cm : Ns +.Ar secret +.Xc +Sign queries using TSIG with the given authentication key. +.Ar keyname is the name of the key, and -\fIsecret\fR -is the base64 encoded shared secret\&. -\fIhmac\fR -is the name of the key algorithm; valid choices are -hmac\-md5, -hmac\-sha1, -hmac\-sha224, -hmac\-sha256, -hmac\-sha384, or -hmac\-sha512\&. If -\fIhmac\fR +.Ar secret +is the base64 encoded shared secret. +.Ar hmac +is the name of the key algorithm; +valid choices are +.Ql hmac-md5 , +.Ql hmac-sha1 , +.Ql hmac-sha224 , +.Ql hmac-sha256 , +.Ql hmac-sha384 , +or +.Ql hmac-sha512 . +If +.Ar hmac is not specified, the default is -hmac\-md5 +.Ql hmac-md5 or if MD5 was disabled -hmac\-sha256\&. -.sp +.Ql hmac-sha256 . +.Pp NOTE: You should use the -\fB\-k\fR -option and avoid the -\fB\-y\fR -option, because with -\fB\-y\fR -the shared secret is supplied as a command line argument in clear text\&. This may be visible in the output from -\fBps\fR(1) -or in a history file maintained by the user\*(Aqs shell\&. -.RE -.SH "QUERY OPTIONS" -.PP -\fBdig\fR -provides a number of query options which affect the way in which lookups are made and the results displayed\&. Some of these set or reset flag bits in the query header, some determine which sections of the answer get printed, and others determine the timeout and retry strategies\&. -.PP -Each query option is identified by a keyword preceded by a plus sign (+)\&. Some keywords set or reset an option\&. These may be preceded by the string -no -to negate the meaning of that keyword\&. Other keywords assign values to options like the timeout interval\&. They have the form -\fB+keyword=value\fR\&. Keywords may be abbreviated, provided the abbreviation is unambiguous; for example, -+cd -is equivalent to -+cdflag\&. The query options are: -.PP -\fB+[no]aaflag\fR -.RS 4 +.Fl k +option and +avoid the +.Fl y +option, because +with +.Fl y +the shared secret is supplied as a command line argument in clear text. +This may be visible in the output from +.Xr ps 1 +or in a history file maintained by the user's shell. +.El +.Sh QUERY OPTIONS +.Nm +provides a number of query options which affect the way in which lookups are +made and the results displayed. +Some of +these set or reset flag bits in the query header, some determine which sections +of the answer get printed, and others determine the timeout and retry +strategies. +.Pp +Each query option is identified by a keyword preceded by a plus sign +.Pq Cm + . +Some keywords set or reset an option. +These may be preceded by the string +.Cm no +to negate the meaning of that keyword. +Other keywords assign values to options like the timeout interval. +They have the form +.Cm +keyword= Ns Ar value . +Keywords may be abbreviated, provided the abbreviation is unambiguous; for +example, +.Cm +cd +is equivalent +to +.Cm +cdflag . +The query options are: +.Bl -tag -width Ds +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm aaflag +.Xc A synonym for -\fI+[no]aaonly\fR\&. -.RE -.PP -\fB+[no]aaonly\fR -.RS 4 -Sets the "aa" flag in the query\&. -.RE -.PP -\fB+[no]additional\fR -.RS 4 -Display [do not display] the additional section of a reply\&. The default is to display it\&. -.RE -.PP -\fB+[no]adflag\fR -.RS 4 -Set [do not set] the AD (authentic data) bit in the query\&. This requests the server to return whether all of the answer and authority sections have all been validated as secure according to the security policy of the server\&. AD=1 indicates that all records have been validated as secure and the answer is not from a OPT\-OUT range\&. AD=0 indicate that some part of the answer was insecure or not validated\&. This bit is set by default\&. -.RE -.PP -\fB+[no]all\fR -.RS 4 -Set or clear all display flags\&. -.RE -.PP -\fB+[no]answer\fR -.RS 4 -Display [do not display] the answer section of a reply\&. The default is to display it\&. -.RE -.PP -\fB+[no]authority\fR -.RS 4 -Display [do not display] the authority section of a reply\&. The default is to display it\&. -.RE -.PP -\fB+[no]besteffort\fR -.RS 4 -Attempt to display the contents of messages which are malformed\&. The default is to not display malformed answers\&. -.RE -.PP -\fB+bufsize=B\fR -.RS 4 +.Xo +.Cm + Ns +.Op Cm no Ns +.Cm aaonly +.Xc +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm aaonly +.Xc +Sets the "aa" flag in the query. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm additional +.Xc +Display [do not display] the additional section of a reply. +The default is to display it. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm adflag +.Xc +Set [do not set] the AD (authentic data) bit in the query. +This requests the server to return whether all of the answer and authority +sections have all been validated as secure according to the security policy of +the server. +AD=1 indicates that all records have been validated as secure and the answer is +not from a OPT-OUT range. +AD=0 indicate that some part of the answer was insecure or not validated. +This bit is set by default. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm all +.Xc +Set or clear all display flags. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm answer +.Xc +Display [do not display] the answer section of a reply. +The default is to display it. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm authority +.Xc +Display [do not display] the authority section of a +reply. +The default is to display it. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm besteffort +.Xc +Attempt to display the contents of messages which are malformed. +The default is to not display malformed answers. +.It Cm +bufsize= Ns Ar B Set the UDP message buffer size advertised using EDNS0 to -\fIB\fR -bytes\&. The maximum and minimum sizes of this buffer are 65535 and 0 respectively\&. Values outside this range are rounded up or down appropriately\&. Values other than zero will cause a EDNS query to be sent\&. -.RE -.PP -\fB+[no]cdflag\fR -.RS 4 -Set [do not set] the CD (checking disabled) bit in the query\&. This requests the server to not perform DNSSEC validation of responses\&. -.RE -.PP -\fB+[no]class\fR -.RS 4 -Display [do not display] the CLASS when printing the record\&. -.RE -.PP -\fB+[no]cmd\fR -.RS 4 -Toggles the printing of the initial comment in the output identifying the version of -\fBdig\fR -and the query options that have been applied\&. This comment is printed by default\&. -.RE -.PP -\fB+[no]comments\fR -.RS 4 -Toggle the display of comment lines in the output\&. The default is to print comments\&. -.RE -.PP -\fB+[no]cookie\fR\fB[=####]\fR -.RS 4 +.Ar B +bytes. +The maximum and minimum sizes of this buffer are 65535 and 0 respectively. +Values outside this range are rounded up or down appropriately. +Values other than zero will cause a EDNS query to be sent. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm cdflag +.Xc +Set [do not set] the CD (checking disabled) bit in the query. +This requests the server to not perform DNSSEC validation of responses. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm class +.Xc +Display [do not display] the CLASS when printing the record. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm cmd +.Xc +Toggles the printing of the initial comment in the output identifying the +version of +.Nm +and the query options that have been applied. +This comment is printed by default. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm comments +.Xc +Toggle the display of comment lines in the output. +The default is to print comments. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm cookie= Ns +.Ar value +.Xc Send an COOKIE EDNS option, containing an optional -\fIvalue\fR\&. Replaying a COOKIE from a previous response will allow the server to identify a previous client\&. The default is -\fB+nocookie\fR\&. -.sp -\fB+cookie\fR -is automatically set when +trace is in use, to better emulate the default queries from a nameserver\&. -.sp +.Ar value . +Replaying a COOKIE from a previous response will allow the server to +identify a previous client. +The default is +.Cm +nocookie . +.Pp +.Cm +cookie +is automatically set when +.Cm +trace +is in use, to better emulate the default queries from a nameserver. +.Pp This option was formerly called -\fB+[no]sit\fR -(Server Identity Token)\&. In BIND 9\&.10\&.0 through BIND 9\&.10\&.2, it sent the experimental option code 65001\&. This was changed to option code 10 in BIND 9\&.10\&.3 when the DNS COOKIE option was allocated\&. -.sp +.Xo +.Cm + Ns +.Op Cm no Ns +.Cm sit +.Xc +(Server Identity Token). In BIND 9.10.0 through BIND 9.10.2, +it sent the experimental option code 65001. +This was changed to option code 10 in BIND 9.10.3 when the DNS +COOKIE option was allocated. +.Pp The -\fB+[no]sit\fR +.Xo +.Cm + Ns +.Op Cm no Ns +.Cm sit +.Xc is now deprecated, but has been retained as a synonym for -\fB+[no]cookie\fR -for backward compatibility within the BIND 9\&.10 branch\&. -.RE -.PP -\fB+[no]crypto\fR -.RS 4 -Toggle the display of cryptographic fields in DNSSEC records\&. The contents of these field are unnecessary to debug most DNSSEC validation failures and removing them makes it easier to see the common failures\&. The default is to display the fields\&. When omitted they are replaced by the string "[omitted]" or in the DNSKEY case the key id is displayed as the replacement, e\&.g\&. "[ key id = value ]"\&. -.RE -.PP -\fB+[no]defname\fR -.RS 4 +.Xo +.Cm + Ns +.Op Cm no Ns +.Cm cookie +.Xc +for backward compatibility within the BIND 9.10 branch. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm crypto +.Xc +Toggle the display of cryptographic fields in DNSSEC records. +The contents of these field are unnecessary to debug most DNSSEC validation +failures and removing them makes it easier to see the common failures. +The default is to display the fields. +When omitted they are replaced by the string "[omitted]" or in the DNSKEY case +the key id is displayed as the replacement, e.g. "[ key id = value ]". +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm defname +.Xc Deprecated, treated as a synonym for -\fI+[no]search\fR -.RE -.PP -\fB+[no]dnssec\fR -.RS 4 -Requests DNSSEC records be sent by setting the DNSSEC OK bit (DO) in the OPT record in the additional section of the query\&. -.RE -.PP -\fB+domain=somename\fR -.RS 4 +.Xo +.Cm + Ns +.Op Cm no Ns +.Cm search +.Xc . +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm dnssec +.Xc +Requests DNSSEC records be sent by setting the DNSSEC OK bit (DO) in the OPT +record in the additional section of the query. +.It Cm +domain= Ns Ar somename Set the search list to contain the single domain -\fIsomename\fR, as if specified in a -\fBdomain\fR +.Ar somename , +as if specified in a +.Nm domain directive in -/etc/resolv\&.conf, and enable search list processing as if the -\fI+search\fR -option were given\&. -.RE -.PP -\fB+[no]edns[=#]\fR -.RS 4 -Specify the EDNS version to query with\&. Valid values are 0 to 255\&. Setting the EDNS version will cause a EDNS query to be sent\&. -\fB+noedns\fR -clears the remembered EDNS version\&. EDNS is set to 0 by default\&. -.RE -.PP -\fB+[no]ednsflags[=#]\fR -.RS 4 -Set the must\-be\-zero EDNS flags bits (Z bits) to the specified value\&. Decimal, hex and octal encodings are accepted\&. Setting a named flag (e\&.g\&. DO) will silently be ignored\&. By default, no Z bits are set\&. -.RE -.PP -\fB+[no]ednsnegotiation\fR -.RS 4 -Enable / disable EDNS version negotiation\&. By default EDNS version negotiation is enabled\&. -.RE -.PP -\fB+[no]ednsopt[=code[:value]]\fR -.RS 4 +.Pa /etc/resolv.conf , +and enable search list processing as if the +.Cm +search +option were given. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm edns Ns +.Op Cm = Ns Ar # +.Xc +Specify the EDNS version to query with. +Valid values are 0 to 255. +Setting the EDNS version will cause a EDNS query to be sent. +.Cm +noedns +clears the remembered EDNS version. +EDNS is set to 0 by default. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm ednsflags Ns +.Op Cm = Ns Ar # +.Xc +Set the must-be-zero EDNS flags bits (Z bits) to the specified value. +Decimal, hex and octal encodings are accepted. +Setting a named flag (e.g. DO) will silently be ignored. +By default, no Z bits are set. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm ednsnegotiation +.Xc +Enable / disable EDNS version negotiation. +By default +EDNS version negotiation is enabled. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm ednsopt Ns +.Op Cm = Ns Ar code Ns Op Cm : Ns Ar value +.Xc Specify EDNS option with code point -\fBcode\fR +.Ar code and optionally payload of -\fBvalue\fR -as a hexadecimal string\&. -\fBcode\fR -can be either an EDNS option name (for example, -NSID +.Ar value +as a hexadecimal string. +.Ar code +can be +either an EDNS option name (for example, +.Cm NSID or -ECS), or an arbitrary numeric value\&. -\fB+noednsopt\fR -clears the EDNS options to be sent\&. -.RE -.PP -\fB+[no]expire\fR -.RS 4 -Send an EDNS Expire option\&. -.RE -.PP -\fB+[no]fail\fR -.RS 4 -Do not try the next server if you receive a SERVFAIL\&. The default is to not try the next server which is the reverse of normal stub resolver behavior\&. -.RE -.PP -\fB+[no]identify\fR -.RS 4 -Show [or do not show] the IP address and port number that supplied the answer when the -\fI+short\fR -option is enabled\&. If short form answers are requested, the default is not to show the source address and port number of the server that provided the answer\&. -.RE -.PP -\fB+[no]idnout\fR -.RS 4 -Convert [do not convert] puny code on output\&. This requires IDN SUPPORT to have been enabled at compile time\&. The default is to convert output\&. -.RE -.PP -\fB+[no]ignore\fR -.RS 4 -Ignore truncation in UDP responses instead of retrying with TCP\&. By default, TCP retries are performed\&. -.RE -.PP -\fB+[no]keepopen\fR -.RS 4 -Keep the TCP socket open between queries and reuse it rather than creating a new TCP socket for each lookup\&. The default is -\fB+nokeepopen\fR\&. -.RE -.PP -\fB+[no]multiline\fR -.RS 4 -Print records like the SOA records in a verbose multi\-line format with human\-readable comments\&. The default is to print each record on a single line, to facilitate machine parsing of the -\fBdig\fR -output\&. -.RE -.PP -\fB+ndots=D\fR -.RS 4 +.Cm ECS ) , +or an arbitrary numeric value. +.Cm +noednsopt +clears the EDNS options to be sent. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm expire +.Xc +Send an EDNS Expire option. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm fail +.Xc +Do not try the next server if you receive a SERVFAIL. +The default is to not try the next server which is the reverse of normal stub +resolver behavior. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm identify +.Xc +Show [or do not show] the IP address and port number that supplied the answer +when the +.Cm +short +option is enabled. +If short form answers are requested, the default is not to show the source +address and port number of the server that provided the answer. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm idnout +.Xc +Convert [do not convert] puny code on output. +This requires IDN SUPPORT to have been enabled at compile time. +The default is to convert output. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm ignore +.Xc +Ignore truncation in UDP responses instead of retrying with TCP. +By default, TCP retries are performed. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm keepopen +.Xc +Keep the TCP socket open between queries and reuse it rather than creating a new +TCP socket for each lookup. +The default is +.Cm +nokeepopen . +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm multiline +.Xc +Print records like the SOA records in a verbose multi-line format with +human-readable comments. +The default is to print each record on a single line, to facilitate machine +parsing of the +.Nm +output. +.It Cm +ndots= Ns Ar D Set the number of dots that have to appear in -\fIname\fR +.Ar name to -\fID\fR -for it to be considered absolute\&. The default value is that defined using the ndots statement in -/etc/resolv\&.conf, or 1 if no ndots statement is present\&. Names with fewer dots are interpreted as relative names and will be searched for in the domains listed in the -\fBsearch\fR +.Ar D +for it to be considered absolute. +The default value is that defined using the ndots statement in +.Pa /etc/resolv.conf , +or 1 if no ndots statement is present. +Names with fewer dots are interpreted as relative names and will be searched +for in the domains listed in the +.Cm search or -\fBdomain\fR +.Cm domain directive in -/etc/resolv\&.conf +.Pa /etc/resolv.conf if -\fB+search\fR -is set\&. -.RE -.PP -\fB+[no]nsid\fR -.RS 4 -Include an EDNS name server ID request when sending a query\&. -.RE -.PP -\fB+[no]nssearch\fR -.RS 4 +.Cm +search +is set. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm nsid +.Xc +Include an EDNS name server ID request when sending a query. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm nssearch +.Xc When this option is set, -\fBdig\fR -attempts to find the authoritative name servers for the zone containing the name being looked up and display the SOA record that each name server has for the zone\&. -.RE -.PP -\fB+[no]onesoa\fR -.RS 4 -Print only one (starting) SOA record when performing an AXFR\&. The default is to print both the starting and ending SOA records\&. -.RE -.PP -\fB+[no]opcode=value\fR -.RS 4 -Set [restore] the DNS message opcode to the specified value\&. The default value is QUERY (0)\&. -.RE -.PP -\fB+[no]qr\fR -.RS 4 -Print [do not print] the query as it is sent\&. By default, the query is not printed\&. -.RE -.PP -\fB+[no]question\fR -.RS 4 -Print [do not print] the question section of a query when an answer is returned\&. The default is to print the question section as a comment\&. -.RE -.PP -\fB+[no]rdflag\fR -.RS 4 +.Nm +attempts to find the authoritative name servers for the zone containing the name +being looked up and display the SOA record that each name server has for the +zone. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm onesoa +.Xc +Print only one (starting) SOA record when performing an AXFR. +The default is to print both the starting and ending SOA records. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm opcode= Ns +.Ar value +.Xc +Set [restore] the DNS message opcode to the specified value. +The default value is QUERY (0). +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm qr +.Xc +Print [do not print] the query as it is sent. +By +default, the query is not printed. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm question +.Xc +Print [do not print] the question section of a query when an answer is returned. +The default is to print the question section as a comment. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm rdflag +.Xc A synonym for -\fI+[no]recurse\fR\&. -.RE -.PP -\fB+[no]recurse\fR -.RS 4 -Toggle the setting of the RD (recursion desired) bit in the query\&. This bit is set by default, which means -\fBdig\fR -normally sends recursive queries\&. Recursion is automatically disabled when the -\fI+nssearch\fR +.Xo +.Cm + Ns +.Op Cm no Ns +.Cm recurse +.Xc . +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm recurse +.Xc +Toggle the setting of the RD (recursion desired) bit in the query. +This bit is set by default, which means +.Nm +normally sends recursive queries. +Recursion is automatically disabled when the +.Cm +nssearch or -\fI+trace\fR -query options are used\&. -.RE -.PP -\fB+retry=T\fR -.RS 4 +.Cm +trace +query options are used. +.It Cm +retry= Ns Ar T Sets the number of times to retry UDP queries to server to -\fIT\fR -instead of the default, 2\&. Unlike -\fI+tries\fR, this does not include the initial query\&. -.RE -.PP -\fB+[no]rrcomments\fR -.RS 4 -Toggle the display of per\-record comments in the output (for example, human\-readable key information about DNSKEY records)\&. The default is not to print record comments unless multiline mode is active\&. -.RE -.PP -\fB+[no]search\fR -.RS 4 -Use [do not use] the search list defined by the searchlist or domain directive in -resolv\&.conf -(if any)\&. The search list is not used by default\&. -.sp -\*(Aqndots\*(Aq from -resolv\&.conf +.Ar T +instead of the default, 2. +Unlike +.Cm +tries , +this does not include the initial query. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm rrcomments +.Xc +Toggle the display of per-record comments in the output (for example, +human-readable key information about DNSKEY records). +The default is not to print record comments unless multiline mode is active. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm search +.Xc +Use [do not use] the search list defined by the searchlist or domain directive +in +.Pa resolv.conf +(if any). +The search list is not used by default. +.Pp +\&'ndots' from +.Pa resolv.conf (default 1) which may be overridden by -\fI+ndots\fR -determines if the name will be treated as relative or not and hence whether a search is eventually performed or not\&. -.RE -.PP -\fB+[no]short\fR -.RS 4 -Provide a terse answer\&. The default is to print the answer in a verbose form\&. -.RE -.PP -\fB+[no]showsearch\fR -.RS 4 -Perform [do not perform] a search showing intermediate results\&. -.RE -.PP -\fB+[no]sigchase\fR -.RS 4 -Chase DNSSEC signature chains\&. Requires dig be compiled with \-DDIG_SIGCHASE\&. This feature is deprecated\&. Use -\fBdelv\fR -instead\&. -.RE -.PP -\fB+[no]sit\fR\fB[=####]\fR -.RS 4 +.Cm +ndots +determines if the name will be treated as relative or not and hence whether a +search is eventually performed or not. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm short +.Xc +Provide a terse answer. +The default is to print the answer in a verbose form. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm showsearch +.Xc +Perform [do not perform] a search showing intermediate results. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm sigchase +.Xc +Chase DNSSEC signature chains. +Requires dig be compiled with -DDIG_SIGCHASE. +This feature is deprecated. +Use +.Nm delv +instead. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm sit Ns +.Op = Ns Ar value +.Xc This option is a synonym for -\fB+[no]cookie\fR\&. -.sp +.Xo +.Cm + Ns +.Op Cm no Ns +.Cm cookie +.Xc . +.Pp The -\fB+[no]sit\fR -is deprecated\&. -.RE -.PP -\fB+split=W\fR -.RS 4 -Split long hex\- or base64\-formatted fields in resource records into chunks of -\fIW\fR +.Xo +.Cm + Ns +.Op Cm no Ns +.Cm sit +.Xc +is deprecated. +.It Cm +split= Ns Ar W +Split long hex- or base64-formatted fields in resource records into chunks of +.Ar W characters (where -\fIW\fR -is rounded up to the nearest multiple of 4)\&. -\fI+nosplit\fR +.Ar W +is rounded up to the nearest multiple of 4). +.Cm +nosplit or -\fI+split=0\fR -causes fields not to be split at all\&. The default is 56 characters, or 44 characters when multiline mode is active\&. -.RE -.PP -\fB+[no]stats\fR -.RS 4 -This query option toggles the printing of statistics: when the query was made, the size of the reply and so on\&. The default behavior is to print the query statistics\&. -.RE -.PP -\fB+[no]subnet=addr[/prefix\-length]\fR -.RS 4 -Send (don\*(Aqt send) an EDNS Client Subnet option with the specified IP address or network prefix\&. -.sp -\fBdig +subnet=0\&.0\&.0\&.0/0\fR, or simply -\fBdig +subnet=0\fR -for short, sends an EDNS CLIENT\-SUBNET option with an empty address and a source prefix\-length of zero, which signals a resolver that the client\*(Aqs address information must -\fInot\fR -be used when resolving this query\&. -.RE -.PP -\fB+[no]tcp\fR -.RS 4 -Use [do not use] TCP when querying name servers\&. The default behavior is to use UDP unless an -ixfr=N -query is requested, in which case the default is TCP\&. AXFR queries always use TCP\&. -.RE -.PP -\fB+time=T\fR -.RS 4 +.Cm +split= Ns Ar 0 +causes fields not to be split at all. +The default is 56 characters, or 44 characters when multiline mode is active. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm stats +.Xc +This query option toggles the printing of statistics: +when the query was made, the size of the reply and so on. +The default behavior is to print the query statistics. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm subnet= Ns +.Ar addr Ns +.Op / Ns Ar prefix-length +.Xc +Send (don't send) an EDNS Client Subnet option with the specified IP address or +network prefix. +.Pp +.Nm +.Cm +subnet= Ns 0.0.0.0/0 , +or simply +.Nm +.Cm +subnet= Ns 0 +for short, sends an EDNS CLIENT-SUBNET option with an empty address and a +source prefix-length of zero, which signals a resolver that the client's address +information must +.Em not +be used when resolving this query. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm tcp +.Xc +Use [do not use] TCP when querying name servers. +The default behavior is to use UDP unless an ixfr=N query is requested, in which +case the default is TCP. +AXFR queries always use TCP. +.It Cm +time= Ns Ar T Sets the timeout for a query to -\fIT\fR -seconds\&. The default timeout is 5 seconds\&. An attempt to set -\fIT\fR -to less than 1 will result in a query timeout of 1 second being applied\&. -.RE -.PP -\fB+[no]topdown\fR -.RS 4 -When chasing DNSSEC signature chains perform a top\-down validation\&. Requires dig be compiled with \-DDIG_SIGCHASE\&. This feature is deprecated\&. Use -\fBdelv\fR -instead\&. -.RE -.PP -\fB+[no]trace\fR -.RS 4 -Toggle tracing of the delegation path from the root name servers for the name being looked up\&. Tracing is disabled by default\&. When tracing is enabled, -\fBdig\fR -makes iterative queries to resolve the name being looked up\&. It will follow referrals from the root servers, showing the answer from each server that was used to resolve the lookup\&. -.sp -If @server is also specified, it affects only the initial query for the root zone name servers\&. -.sp -\fB+dnssec\fR -is also set when +trace is set to better emulate the default queries from a nameserver\&. -.RE -.PP -\fB+tries=T\fR -.RS 4 +.Ar T +seconds. +The default timeout is 5 seconds. +An attempt to set +.Ar T +to less than 1 will result in a query timeout of 1 second being applied. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm topdown +.Xc +When chasing DNSSEC signature chains perform a top-down validation. +Requires dig be compiled with -DDIG_SIGCHASE. +This feature is deprecated. +Use +.Nm delv +instead. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm trace +.Xc +Toggle tracing of the delegation path from the root name servers for the name +being looked up. +Tracing is disabled by default. +When tracing is enabled, +.Nm +makes iterative queries to resolve the name being looked up. +It will follow referrals from the root servers, showing the answer from each +server that was used to resolve the lookup. +.Pp +If @server is also specified, it affects only the initial query for the root +zone name servers. +.Pp +.Nm +dnssec +is also set when +trace is set to better emulate the default queries from a +nameserver. +.It Cm +tries= Ns Ar T Sets the number of times to try UDP queries to server to -\fIT\fR -instead of the default, 3\&. If -\fIT\fR -is less than or equal to zero, the number of tries is silently rounded up to 1\&. -.RE -.PP -\fB+trusted\-key=####\fR -.RS 4 +.Ar T +instead of the default, 3. +If +.Ar T +is less than or equal to zero, the number of tries is silently rounded up to 1. +.It Cm +trusted-key= Ns Ar file Specifies a file containing trusted keys to be used with -\fB+sigchase\fR\&. Each DNSKEY record must be on its own line\&. -.sp +.Cm +sigchase . +Each DNSKEY record must be on its own line. +.Pp If not specified, -\fBdig\fR +.Nm will look for -/etc/trusted\-key\&.key +.Pa /etc/trusted-key.key then -trusted\-key\&.key -in the current directory\&. -.sp -Requires dig be compiled with \-DDIG_SIGCHASE\&. This feature is deprecated\&. Use -\fBdelv\fR -instead\&. -.RE -.PP -\fB+[no]ttlid\fR -.RS 4 -Display [do not display] the TTL when printing the record\&. -.RE -.PP -\fB+[no]vc\fR -.RS 4 -Use [do not use] TCP when querying name servers\&. This alternate syntax to -\fI+[no]tcp\fR -is provided for backwards compatibility\&. The "vc" stands for "virtual circuit"\&. -.RE -.SH "MULTIPLE QUERIES" -.PP +.Pa trusted-key.key +in the current directory. +.Pp +Requires dig be compiled with -DDIG_SIGCHASE. +This feature is deprecated. +Use +.Nm delv +instead. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm ttlid +.Xc +Display [do not display] the TTL when printing the record. +.It Xo +.Cm + Ns +.Op Cm no Ns +.Cm vc +.Xc +Use [do not use] TCP when querying name servers. +This alternate syntax to +.Xo +.Cm + Ns +.Op Cm no Ns +.Cm tcp +.Xc +is provided for backwards compatibility. +The "vc" stands for "virtual circuit". +.El +.Sh MULTIPLE QUERIES The BIND 9 implementation of -\fBdig \fR -supports specifying multiple queries on the command line (in addition to supporting the -\fB\-f\fR -batch file option)\&. Each of those queries can be supplied with its own set of flags, options and query options\&. -.PP +.Nm +supports specifying multiple queries on the command line (in addition to +supporting the +.Fl f +batch file option). +Each of those queries can be supplied with its own set of flags, options and +query options. +.Pp In this case, each -\fIquery\fR -argument represent an individual query in the command\-line syntax described above\&. Each consists of any of the standard options and flags, the name to be looked up, an optional query type and class and any query options that should be applied to that query\&. -.PP -A global set of query options, which should be applied to all queries, can also be supplied\&. These global query options must precede the first tuple of name, class, type, options, flags, and query options supplied on the command line\&. Any global query options (except the -\fB+[no]cmd\fR -option) can be overridden by a query\-specific set of query options\&. For example: -.sp -.if n \{\ -.RS 4 -.\} -.nf -dig +qr www\&.isc\&.org any \-x 127\&.0\&.0\&.1 isc\&.org ns +noqr -.fi -.if n \{\ -.RE -.\} -.sp +.Ar query +argument represent an individual query in the command-line syntax described +above. +Each consists of any of the standard options and flags, the name to be looked +up, an optional query type and class and any query options that should be +applied to that query. +.Pp +A global set of query options, which should be applied to all queries, can +also be supplied. +These global query options must precede the first tuple of name, class, type, +options, flags, and query options supplied on the command line. +Any global query options (except the +.Xo +.Cm + Ns +.Op Cm no Ns +.Cm cmd +.Xc +option) can be overridden by a query-specific set of query options. +For example: +.Bd -literal -offset indent +dig +qr www.isc.org any -x 127.0.0.1 isc.org ns +noqr +.Ed +.Pp shows how -\fBdig\fR +.Nm could be used from the command line to make three lookups: an ANY query for -www\&.isc\&.org, a reverse lookup of 127\&.0\&.0\&.1 and a query for the NS records of -isc\&.org\&. A global query option of -\fI+qr\fR +www.isc.org, a reverse lookup of 127.0.0.1 and a query for the NS records of +isc.org. +A global query option of +.Cm +qr is applied, so that -\fBdig\fR -shows the initial query it made for each lookup\&. The final query has a local query option of -\fI+noqr\fR +.Nm +shows the initial query it made for each lookup. +The final query has a local query option of +.Cm +noqr which means that -\fBdig\fR +.Nm will not print the initial query when it looks up the NS records for -isc\&.org\&. -.SH "IDN SUPPORT" -.PP +isc.org. +.Sh IDN SUPPORT If -\fBdig\fR -has been built with IDN (internationalized domain name) support, it can accept and display non\-ASCII domain names\&. -\fBdig\fR -appropriately converts character encoding of domain name before sending a request to DNS server or displaying a reply from the server\&. If you\*(Aqd like to turn off the IDN support for some reason, defines the -\fBIDN_DISABLE\fR -environment variable\&. The IDN support is disabled if the variable is set when -\fBdig\fR -runs\&. -.SH "FILES" -.PP -/etc/resolv\&.conf -.PP -${HOME}/\&.digrc -.SH "SEE ALSO" -.PP -\fBdelv\fR(1), -\fBhost\fR(1), -\fBnamed\fR(8), -\fBdnssec-keygen\fR(8), -RFC 1035\&. -.SH "BUGS" -.PP -There are probably too many query options\&. -.SH "AUTHOR" -.PP -\fBInternet Systems Consortium, Inc\&.\fR -.SH "COPYRIGHT" -.br -Copyright \(co 2000-2011, 2013-2018 Internet Systems Consortium, Inc. ("ISC") -.br +.Nm +has been built with IDN (internationalized domain name) support, it can accept +and display non-ASCII domain names. +.Nm +appropriately converts character encoding of domain name before sending a +request to DNS server or displaying a reply from the server. +If you'd like to turn off the IDN support for some reason, defines the +.Ev IDN_DISABLE +environment variable. +The IDN support is disabled if the variable is set when +.Nm +runs. +.Sh FILES +.Pa /etc/resolv.conf +.Pp +.Pa ${HOME}/.digrc +.Sh SEE ALSO +.Xr host 1 +.Sh STANDARDS +.Rs +.%A P. Mockapetris +.%D November 1987 +.%R RFC 1035 +.%T Domain Names - Implementation and Specification +.Re +.Sh AUTHORS +.An -nosplit +.An Internet Systems Consortium, Inc . +.Sh BUGS +There are probably too many query options. diff --git a/usr.sbin/bind/bin/dig/host.1 b/usr.sbin/bind/bin/dig/host.1 index d1ce9dd5e9b..883ee96637c 100644 --- a/usr.sbin/bind/bin/dig/host.1 +++ b/usr.sbin/bind/bin/dig/host.1 @@ -1,9 +1,11 @@ +.\" $OpenBSD: host.1,v 1.9 2019/12/17 16:41:26 jsg Exp $ +.\" .\" Copyright (C) 2000-2002, 2004, 2005, 2007-2009, 2014-2018 Internet Systems Consortium, Inc. ("ISC") -.\" +.\" .\" Permission to use, copy, modify, and/or distribute this software for any .\" purpose with or without fee is hereby granted, provided that the above .\" copyright notice and this permission notice appear in all copies. -.\" +.\" .\" THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH .\" REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY .\" AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, @@ -12,256 +14,244 @@ .\" OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR .\" PERFORMANCE OF THIS SOFTWARE. .\" -.hy 0 -.ad l -'\" t -.\" Title: host -.\" Author: -.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/> -.\" Date: 2009-01-20 -.\" Manual: BIND9 -.\" Source: ISC -.\" Language: English -.\" -.TH "HOST" "1" "2009\-01\-20" "ISC" "BIND9" -.\" ----------------------------------------------------------------- -.\" * 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" -host \- DNS lookup utility -.SH "SYNOPSIS" -.HP \w'\fBhost\fR\ 'u -\fBhost\fR [\fB\-aCdlnrsTwv\fR] [\fB\-c\ \fR\fB\fIclass\fR\fR] [\fB\-N\ \fR\fB\fIndots\fR\fR] [\fB\-R\ \fR\fB\fInumber\fR\fR] [\fB\-t\ \fR\fB\fItype\fR\fR] [\fB\-W\ \fR\fB\fIwait\fR\fR] [\fB\-m\ \fR\fB\fIflag\fR\fR] [[\fB\-4\fR] | [\fB\-6\fR]] [\fB\-v\fR] [\fB\-V\fR] {name} [server] -.SH "DESCRIPTION" -.PP -\fBhost\fR -is a simple utility for performing DNS lookups\&. It is normally used to convert names to IP addresses and vice versa\&. When no arguments or options are given, -\fBhost\fR -prints a short summary of its command line arguments and options\&. -.PP -\fIname\fR -is the domain name that is to be looked up\&. It can also be a dotted\-decimal IPv4 address or a colon\-delimited IPv6 address, in which case -\fBhost\fR -will by default perform a reverse lookup for that address\&. -\fIserver\fR -is an optional argument which is either the name or IP address of the name server that -\fBhost\fR +.Dd $Mdocdate: December 17 2019 $ +.Dt HOST 1 +.Os +.Sh NAME +.Nm host +.Nd DNS lookup utility +.Sh SYNOPSIS +.Nm +.Op Fl aCdlnrsTwv +.Op Fl c Ar class +.Op Fl N Ar ndots +.Op Fl R Ar number +.Op Fl t Ar type +.Op Fl W Ar wait +.Op Fl m Ar flag +.Op Oo Fl 4 Oc | Oo Fl 6 Oc +.Op Fl v +.Op Fl V +.Ar name +.Op Ar server +.Sh DESCRIPTION +The +.Nm +command is a simple utility for performing DNS lookups. +It is normally used to convert names to IP addresses and vice versa. +When no arguments or options are given, +.Nm +prints a short summary of its command line arguments and options. +.Pp +.Ar name +is the domain name that is to be looked up. +It can also be a dotted-decimal IPv4 address or a colon-delimited IPv6 +address, in which case +.Nm +will by default perform a reverse lookup for that address. +.Ar server +is an optional argument which is either the name or IP address of the name +server that +.Nm should query instead of the server or servers listed in -/etc/resolv\&.conf\&. -.SH "OPTIONS" -.PP -\-4 -.RS 4 -Use IPv4 only for query transport\&. See also the -\fB\-6\fR -option\&. -.RE -.PP -\-6 -.RS 4 -Use IPv6 only for query transport\&. See also the -\fB\-4\fR -option\&. -.RE -.PP -\-a -.RS 4 -"All"\&. The -\fB\-a\fR +.Pa /etc/resolv.conf . +.Pp +The options are as follows: +.Bl -tag -width Ds +.It Fl 4 +Use IPv4 only for query transport. +See also the +.Fl 6 +option. +.It Fl 6 +Use IPv6 only for query transport. +See also the +.Fl 4 +option. +.It Fl a +"All". The +.Fl a option is normally equivalent to -\fB\-v \-t \fR\fBANY\fR\&. It also affects the behaviour of the -\fB\-l\fR -list zone option\&. -.RE -.PP -\-c \fIclass\fR -.RS 4 -Query class: This can be used to lookup HS (Hesiod) or CH (Chaosnet) class resource records\&. The default class is IN (Internet)\&. -.RE -.PP -\-C -.RS 4 +.Fl v +.Fl t Cm ANY . +It also affects the behaviour of the +.Fl l +list zone option. +.It Fl c Ar class +Query class: This can be used to lookup +.Cm HS +(Hesiod) +or +.Cm CH +(Chaosnet) class resource records. +The default class is +.Cm IN +(Internet). +.It Fl C Check consistency: -\fBhost\fR +.Nm will query the SOA records for zone -\fIname\fR -from all the listed authoritative name servers for that zone\&. The list of name servers is defined by the NS records that are found for the zone\&. -.RE -.PP -\-d -.RS 4 -Print debugging traces\&. Equivalent to the -\fB\-v\fR -verbose option\&. -.RE -.PP -\-i -.RS 4 -Obsolete\&. Use the IP6\&.INT domain for reverse lookups of IPv6 addresses as defined in RFC1886 and deprecated in RFC4159\&. The default is to use IP6\&.ARPA as specified in RFC3596\&. -.RE -.PP -\-l -.RS 4 -List zone: The -\fBhost\fR -command performs a zone transfer of zone -\fIname\fR -and prints out the NS, PTR and address records (A/AAAA)\&. -.sp +.Ar name +from all the listed authoritative name servers for that zone. +The list of name servers is defined by the NS records that are found for the +zone. +.It Fl d +Print debugging traces. +Equivalent to the +.Fl v +verbose option. +.It Fl i +Obsolete. +Use the IP6.INT domain for reverse lookups of IPv6 addresses as defined in +RFC1886 and deprecated in RFC4159. +The default is to use IP6.ARPA as specified in RFC3596. +.It Fl l +List zone: +The +.Nm +command performs a zone transfer of +zone +.Ar name +and prints out the NS, PTR and address records (A/AAAA). +.Pp Together, the -\fB\-l \-a\fR -options print all records in the zone\&. -.RE -.PP -\-N \fIndots\fR -.RS 4 +.Fl l +.Fl a +options print all records in the zone. +.It Fl N Ar ndots The number of dots that have to be in -\fIname\fR -for it to be considered absolute\&. The default value is that defined using the ndots statement in -/etc/resolv\&.conf, or 1 if no ndots statement is present\&. Names with fewer dots are interpreted as relative names and will be searched for in the domains listed in the -\fBsearch\fR +.Ar name +for it to be considered absolute. +The default value is that defined using the ndots statement in +.Pa /etc/resolv.conf , +or 1 if no ndots statement is present. +Names with fewer dots are interpreted as relative names and will be searched for +in the domains listed in the +.Vt search or -\fBdomain\fR +.Vt domain directive in -/etc/resolv\&.conf\&. -.RE -.PP -\-r -.RS 4 -Non\-recursive query: Setting this option clears the RD (recursion desired) bit in the query\&. This should mean that the name server receiving the query will not attempt to resolve -\fIname\fR\&. The -\fB\-r\fR +.Pa /etc/resolv.conf . +.It Fl r +Non-recursive query: +Setting this option clears the RD (recursion desired) bit in the query. +This should mean that the name server receiving the query will not attempt to +resolve +.Ar name . +The +.Fl r option enables -\fBhost\fR -to mimic the behavior of a name server by making non\-recursive queries and expecting to receive answers to those queries that can be referrals to other name servers\&. -.RE -.PP -\-R \fInumber\fR -.RS 4 -Number of retries for UDP queries: If -\fInumber\fR -is negative or zero, the number of retries will default to 1\&. The default value is 1\&. -.RE -.PP -\-s -.RS 4 +.Nm +to mimic the behavior of a name server by making non-recursive queries and +expecting to receive answers to those queries that can be referrals to other +name servers. +.It Fl R Ar number +Number of retries for UDP queries: +If +.Ar number +is negative or zero, the number of retries will default to 1. The default value +is 1. +.It Fl s Do -\fInot\fR -send the query to the next nameserver if any server responds with a SERVFAIL response, which is the reverse of normal stub resolver behavior\&. -.RE -.PP -\-t \fItype\fR -.RS 4 -Query type: The -\fItype\fR -argument can be any recognized query type: CNAME, NS, SOA, TXT, DNSKEY, AXFR, etc\&. -.sp +.Em not +send the query to the next nameserver if any server responds with a SERVFAIL +response, which is the reverse of normal stub resolver behavior. +.It Fl t Ar type +Query type: +The +.Ar type +argument can be any recognized query type: +.Cm CNAME , +.Cm NS , +.Cm SOA , +.Cm TXT , +.Cm DNSKEY , +.Cm AXFR , +etc. +.Pp When no query type is specified, -\fBhost\fR -automatically selects an appropriate query type\&. By default, it looks for A, AAAA, and MX records\&. If the -\fB\-C\fR -option is given, queries will be made for SOA records\&. If -\fIname\fR -is a dotted\-decimal IPv4 address or colon\-delimited IPv6 address, -\fBhost\fR -will query for PTR records\&. -.sp -If a query type of IXFR is chosen the starting serial number can be specified by appending an equal followed by the starting serial number (like -\fB\-t \fR\fBIXFR=12345678\fR)\&. -.RE -.PP -\-T -.RS 4 -TCP: By default, -\fBhost\fR -uses UDP when making queries\&. The -\fB\-T\fR -option makes it use a TCP connection when querying the name server\&. TCP will be automatically selected for queries that require it, such as zone transfer (AXFR) requests\&. -.RE -.PP -\-m \fIflag\fR -.RS 4 +.Nm +automatically selects an appropriate query type. +By default, it looks for A, AAAA, and MX records. +If the +.Fl C +option is given, queries will be made for SOA records. +If +.Ar name +is a dotted-decimal IPv4 address or colon-delimited IPv6 address, +.Nm +will query for PTR records. +.Pp +If a query type of +.Cm IXFR +is chosen the starting serial number can be specified by appending an equal +followed by the starting serial number (like +.Fl t Cm IXFR= Ns Ar 12345678 ) . +.It Fl T +TCP: +By default, +.Nm +uses UDP when making queries. +The +.Fl T +option makes it use a TCP connection when querying the name server. +TCP will be automatically selected for queries that require it, such as zone +transfer (AXFR) requests. +.It Fl m Ar flag Memory usage debugging: the flag can be -\fIrecord\fR, -\fIusage\fR, or -\fItrace\fR\&. You can specify the -\fB\-m\fR -option more than once to set multiple flags\&. -.RE -.PP -\-v -.RS 4 -Verbose output\&. Equivalent to the -\fB\-d\fR -debug option\&. -.RE -.PP -\-V -.RS 4 -Print the version number and exit\&. -.RE -.PP -\-w -.RS 4 -Wait forever: The query timeout is set to the maximum possible\&. See also the -\fB\-W\fR -option\&. -.RE -.PP -\-W \fIwait\fR -.RS 4 +.Cm record , +.Cm usage , +or +.Cm trace . +You can specify the +.Fl m +option more than once to set multiple flags. +.It Fl v +Verbose output. +Equivalent to the +.Fl d +debug option. +.It Fl V +Print the version number and exit. +.It Fl w +Wait forever: The query timeout is set to the maximum possible. +See also the +.Fl W +option. +.It Fl W Ar wait Timeout: Wait for up to -\fIwait\fR -seconds for a reply\&. If -\fIwait\fR -is less than one, the wait interval is set to one second\&. -.sp +.Ar wait +seconds for a reply. +If +.Ar wait +is less than one, the wait interval is set to one second. +.Pp By default, -\fBhost\fR -will wait for 5 seconds for UDP responses and 10 seconds for TCP connections\&. -.sp +.Nm +will wait for 5 seconds for UDP responses and 10 seconds for TCP connections. +.Pp See also the -\fB\-w\fR -option\&. -.RE -.SH "IDN SUPPORT" -.PP +.Fl w +option. +.El +.Sh IDN SUPPORT If -\fBhost\fR -has been built with IDN (internationalized domain name) support, it can accept and display non\-ASCII domain names\&. -\fBhost\fR -appropriately converts character encoding of domain name before sending a request to DNS server or displaying a reply from the server\&. If you\*(Aqd like to turn off the IDN support for some reason, defines the -\fBIDN_DISABLE\fR -environment variable\&. The IDN support is disabled if the variable is set when -\fBhost\fR -runs\&. -.SH "FILES" -.PP -/etc/resolv\&.conf -.SH "SEE ALSO" -.PP -\fBdig\fR(1), -\fBnamed\fR(8)\&. -.SH "AUTHOR" -.PP -\fBInternet Systems Consortium, Inc\&.\fR -.SH "COPYRIGHT" -.br -Copyright \(co 2000-2002, 2004, 2005, 2007-2009, 2014-2018 Internet Systems Consortium, Inc. ("ISC") -.br +.Nm +has been built with IDN (internationalized domain name) support, it can accept +and display non-ASCII domain names. +.Nm +appropriately converts character encoding of domain name before sending a +request to DNS server or displaying a reply from the server. +If you'd like to turn off the IDN support for some reason, defines the +.Ev IDN_DISABLE +environment variable. +The IDN support is disabled if the variable is set when +.Nm +runs. +.Sh FILES +.Pa /etc/resolv.conf +.Sh SEE ALSO +.Xr dig 1 +.Sh AUTHORS +.An -nosplit +.An Internet Systems Consortium, Inc . diff --git a/usr.sbin/bind/bin/dig/nslookup.1 b/usr.sbin/bind/bin/dig/nslookup.1 index aec02566488..b663a5428e5 100644 --- a/usr.sbin/bind/bin/dig/nslookup.1 +++ b/usr.sbin/bind/bin/dig/nslookup.1 @@ -1,9 +1,11 @@ +.\" $OpenBSD: nslookup.1,v 1.12 2019/12/17 16:41:26 jsg Exp $ +.\" .\" Copyright (C) 2004-2007, 2010, 2013-2016, 2018 Internet Systems Consortium, Inc. ("ISC") -.\" +.\" .\" Permission to use, copy, modify, and/or distribute this software for any .\" purpose with or without fee is hereby granted, provided that the above .\" copyright notice and this permission notice appear in all copies. -.\" +.\" .\" THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH .\" REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY .\" AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, @@ -12,291 +14,222 @@ .\" OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR .\" PERFORMANCE OF THIS SOFTWARE. .\" -.hy 0 -.ad l -'\" t -.\" Title: nslookup -.\" Author: -.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/> -.\" Date: 2014-01-24 -.\" Manual: BIND9 -.\" Source: ISC -.\" Language: English -.\" -.TH "NSLOOKUP" "1" "2014\-01\-24" "ISC" "BIND9" -.\" ----------------------------------------------------------------- -.\" * 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" -nslookup \- query Internet name servers interactively -.SH "SYNOPSIS" -.HP \w'\fBnslookup\fR\ 'u -\fBnslookup\fR [\fB\-option\fR] [name\ |\ \-] [server] -.SH "DESCRIPTION" -.PP -\fBNslookup\fR -is a program to query Internet domain name servers\&. -\fBNslookup\fR -has two modes: interactive and non\-interactive\&. Interactive mode allows the user to query name servers for information about various hosts and domains or to print a list of hosts in a domain\&. Non\-interactive mode is used to print just the name and requested information for a host or domain\&. -.SH "ARGUMENTS" -.PP +.Dd $Mdocdate: December 17 2019 $ +.Dt NSLOOKUP 1 +.Os +.Sh NAME +.Nm nslookup +.Nd query Internet name servers interactively +.Sh SYNOPSIS +.Nm +.Op Fl option +.Op Ar name | - +.Op Ar server +.Sh DESCRIPTION +The +.Nm +command queries Internet domain name servers. +It has two modes: interactive and non-interactive. +Interactive mode allows the user to query name servers for information about +various hosts and domains or to print a list of hosts in a domain. +Non-interactive mode is used to print just the name and requested information +for a host or domain. +.Pp Interactive mode is entered in the following cases: -.sp -.RS 4 -.ie n \{\ -\h'-04' 1.\h'+01'\c -.\} -.el \{\ -.sp -1 -.IP " 1." 4.2 -.\} +.Bl -enum +.It when no arguments are given (the default name server will be used) -.RE -.sp -.RS 4 -.ie n \{\ -\h'-04' 2.\h'+01'\c -.\} -.el \{\ -.sp -1 -.IP " 2." 4.2 -.\} -when the first argument is a hyphen (\-) and the second argument is the host name or Internet address of a name server\&. -.RE -.PP -Non\-interactive mode is used when the name or Internet address of the host to be looked up is given as the first argument\&. The optional second argument specifies the host name or address of a name server\&. -.PP -Options can also be specified on the command line if they precede the arguments and are prefixed with a hyphen\&. For example, to change the default query type to host information, and the initial timeout to 10 seconds, type: -.sp -.if n \{\ -.RS 4 -.\} -.nf -nslookup \-query=hinfo \-timeout=10 -.fi -.if n \{\ -.RE -.\} -.PP +.It +when the first argument is a hyphen (-) and the second argument is +the host name or Internet address of a name server. +.El +.Pp +Non-interactive mode is used when the name or Internet address of the +host to be looked up is given as the first argument. +The optional second +argument specifies the host name or address of a name server. +.Pp +Options can also be specified on the command line if they precede the +arguments and are prefixed with a hyphen. +For example, to change the default query type to host information, and the +initial timeout to 10 seconds, type: +.Bd -literal -offset indent +nslookup -query=hinfo -timeout=10 +.Ed +.Pp The -\fB\-version\fR +.Fl version option causes -\fBnslookup\fR -to print the version number and immediately exits\&. -.SH "INTERACTIVE COMMANDS" -.PP -\fBhost\fR [server] -.RS 4 -Look up information for host using the current default server or using server, if specified\&. If host is an Internet address and the query type is A or PTR, the name of the host is returned\&. If host is a name and does not have a trailing period, the search list is used to qualify the name\&. -.sp -To look up a host not in the current domain, append a period to the name\&. -.RE -.PP -\fBserver\fR \fIdomain\fR -.RS 4 -.RE -.PP -\fBlserver\fR \fIdomain\fR -.RS 4 +.Nm +to print the version +number and immediately exits. +.Sh INTERACTIVE COMMANDS +.Bl -tag -width Ds +.It Ic host Op Ar server +Look up information for host using the current default server or +using server, if specified. +If host is an Internet address and the query type is A or PTR, the name of the +host is returned. +If host is a name and does not have a trailing period, the search list is used +to qualify the name. +.Pp +To look up a host not in the current domain, append a period to the name. +.It Ic server Ar domain +.It Ic lserver Ar domain Change the default server to -\fIdomain\fR; -\fBlserver\fR +.Ar domain ; +.Ic lserver uses the initial server to look up information about -\fIdomain\fR, while -\fBserver\fR -uses the current default server\&. If an authoritative answer can\*(Aqt be found, the names of servers that might have the answer are returned\&. -.RE -.PP -\fBroot\fR -.RS 4 +.Cm domain , +while +.Ic server +uses the current default server. +If an authoritative answer can't be found, the names of servers that might have +the answer are returned. +.It Ic root not implemented -.RE -.PP -\fBfinger\fR -.RS 4 +.It Ic finger not implemented -.RE -.PP -\fBls\fR -.RS 4 +.It Ic ls not implemented -.RE -.PP -\fBview\fR -.RS 4 +.It Ic view not implemented -.RE -.PP -\fBhelp\fR -.RS 4 +.It Ic help not implemented -.RE -.PP -\fB?\fR -.RS 4 +.It Ic ?\& not implemented -.RE -.PP -\fBexit\fR -.RS 4 -Exits the program\&. -.RE -.PP -\fBset\fR \fIkeyword\fR\fI[=value]\fR -.RS 4 -This command is used to change state information that affects the lookups\&. Valid keywords are: -.PP -\fBall\fR -.RS 4 +.It Ic exit +Exits the program. +.It Ic set Cm keyword= Ns Ar value +This command is used to change state information that affects the lookups. +Valid keywords are: +.Bl -tag -width Ds +.It Cm all Prints the current values of the frequently used options to -\fBset\fR\&. Information about the current default server and host is also printed\&. -.RE -.PP -\fBclass=\fR\fIvalue\fR -.RS 4 +.Ic set . +Information about the current default server and host is also printed. +.It Cm class= Ns Ar value Change the query class to one of: -.PP -\fBIN\fR -.RS 4 +.Bl -tag -width Ds +.It Cm IN the Internet class -.RE -.PP -\fBCH\fR -.RS 4 +.It Cm CH the Chaos class -.RE -.PP -\fBHS\fR -.RS 4 +.It Cm HS the Hesiod class -.RE -.PP -\fBANY\fR -.RS 4 +.It Cm ANY wildcard -.RE -.sp -The class specifies the protocol group of the information\&. -.sp -(Default = IN; abbreviation = cl) -.RE -.PP -\fB \fR\fB\fI[no]\fR\fR\fBdebug\fR -.RS 4 -Turn on or off the display of the full response packet and any intermediate response packets when searching\&. -.sp -(Default = nodebug; abbreviation = -[no]deb) -.RE -.PP -\fB \fR\fB\fI[no]\fR\fR\fBd2\fR -.RS 4 -Turn debugging mode on or off\&. This displays more about what nslookup is doing\&. -.sp -(Default = nod2) -.RE -.PP -\fBdomain=\fR\fIname\fR -.RS 4 +.El +.Pp +The class specifies the protocol group of the information. +.Pp +(Default = +.Cm IN ; +abbreviation = +.Cm cl ) +.It Xo +.Op Cm no Ns +.Cm debug +.Xc +Turn on or off the display of the full response packet and any intermediate +response packets when searching. +.Pp +(Default = +.Cm nodebug ; +abbreviation = +.Cm nodeb ) +.It Xo +.Op Cm no Ns +.Cm d2 +.Xc +Turn debugging mode on or off. +This displays more about what nslookup is doing. +.Pp +(Default = +.Cm nod2 ) +.It Cm domain= Ns Ar name Sets the search list to -\fIname\fR\&. -.RE -.PP -\fB \fR\fB\fI[no]\fR\fR\fBsearch\fR -.RS 4 -If the lookup request contains at least one period but doesn\*(Aqt end with a trailing period, append the domain names in the domain search list to the request until an answer is received\&. -.sp -(Default = search) -.RE -.PP -\fBport=\fR\fIvalue\fR -.RS 4 +.Ar name . +.It Xo +.Op Cm no Ns +.Cm search +.Xc +If the lookup request contains at least one period but doesn't end with a +trailing period, append the domain names in the domain search list to the +request until an answer is received. +.Pp +(Default = +.Cm search ) +.It Cm port= Ns Ar value Change the default TCP/UDP name server port to -\fIvalue\fR\&. -.sp -(Default = 53; abbreviation = po) -.RE -.PP -\fBquerytype=\fR\fIvalue\fR -.RS 4 -.RE -.PP -\fBtype=\fR\fIvalue\fR -.RS 4 -Change the type of the information query\&. -.sp -(Default = A; abbreviations = q, ty) -.RE -.PP -\fB \fR\fB\fI[no]\fR\fR\fBrecurse\fR -.RS 4 -Tell the name server to query other servers if it does not have the information\&. -.sp -(Default = recurse; abbreviation = [no]rec) -.RE -.PP -\fBndots=\fR\fInumber\fR -.RS 4 -Set the number of dots (label separators) in a domain that will disable searching\&. Absolute names always stop searching\&. -.RE -.PP -\fBretry=\fR\fInumber\fR -.RS 4 -Set the number of retries to number\&. -.RE -.PP -\fBtimeout=\fR\fInumber\fR -.RS 4 -Change the initial timeout interval for waiting for a reply to number seconds\&. -.RE -.PP -\fB \fR\fB\fI[no]\fR\fR\fBvc\fR -.RS 4 -Always use a virtual circuit when sending requests to the server\&. -.sp -(Default = novc) -.RE -.PP -\fB \fR\fB\fI[no]\fR\fR\fBfail\fR -.RS 4 -Try the next nameserver if a nameserver responds with SERVFAIL or a referral (nofail) or terminate query (fail) on such a response\&. -.sp -(Default = nofail) -.RE -.sp -.RE -.SH "RETURN VALUES" -.PP -\fBnslookup\fR -returns with an exit status of 1 if any query failed, and 0 otherwise\&. -.SH "FILES" -.PP -/etc/resolv\&.conf -.SH "SEE ALSO" -.PP -\fBdig\fR(1), -\fBhost\fR(1), -\fBnamed\fR(8)\&. -.SH "AUTHOR" -.PP -\fBInternet Systems Consortium, Inc\&.\fR -.SH "COPYRIGHT" -.br -Copyright \(co 2004-2007, 2010, 2013-2016, 2018 Internet Systems Consortium, Inc. ("ISC") -.br +.Ar value . +.Pp +(Default = +.Ar 53 ; +abbreviation = +.Cm po ) +.It Cm querytype= Ns Ar value +.It Cm type= Ns Ar value +Change the type of the information query. +.Pp +(Default = +.Ar A ; +abbreviations = +.Cm q , +.Cm ty ) +.It Xo +.Op Cm no Ns +.Cm recurse +.Xc +Tell the name server to query other servers if it does not have the information. +.Pp +(Default = +.Cm recurse ; +abbreviation = +.Xo +.Op Cm no Ns +.Cm rec +.Xc ) +.It Cm ndots= Ns Ar number +Set the number of dots (label separators) in a domain that will disable +searching. +Absolute names always stop searching. +.It Cm retry= Ns Ar number +Set the number of retries to number. +.It Cm timeout= Ns Ar number +Change the initial timeout interval for waiting for a +reply to number seconds. +.It Xo +.Op Cm no Ns +.Cm vc +.Xc +Always use a virtual circuit when sending requests to the server. +.Pp +(Default = +.Cm novc ) +.It Xo +.Op Cm no Ns +.Cm fail +.Xc +Try the next nameserver if a nameserver responds with SERVFAIL or a referral +.Pq Cm nofail +or terminate query +.Pq Cm fail +on such a response. +.Pp +(Default = +.Cm nofail ) +.El +.El +.Sh FILES +.Pa /etc/resolv.conf +.Sh EXIT STATUS +The +.Nm +command returns with an exit status of 1 if any query failed, and 0 otherwise. +.Sh SEE ALSO +.Xr dig 1 , +.Xr host 1 +.Sh AUTHORS +.An -nosplit +.An Internet Systems Consortium, Inc . |