dig.html revision a057e8e33baa5fa369be28a9680585200ce3ff73
1fdd2470b625a58b57d0b155e6caf8c4fc0afe8aAutomatic Updater - Copyright (C) 2004, 2005 Internet Systems Consortium, Inc. ("ISC")
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews - Copyright (C) 2000-2003 Internet Software Consortium.
4a14ce5ba00ab7bc55c99ffdcf59c7a4ab902721Automatic Updater - Permission to use, copy, modify, and distribute this software for any
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews - purpose with or without fee is hereby granted, provided that the above
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews - copyright notice and this permission notice appear in all copies.
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews - THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews - REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews - AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews - INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews - LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews - OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews - PERFORMANCE OF THIS SOFTWARE.
64affc54f96a2c71cbd10ed71e246ce0746259aaAutomatic Updater<!-- $Id: dig.html,v 1.26 2005/08/25 03:12:43 marka Exp $ -->
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="refentry" lang="en">
2a31bd531072824ef252c18303859d6af7451b00Francis Dupont<a name="man.dig"></a><div class="titlepage"></div>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews<div class="cmdsynopsis"><p><code class="command">dig</code> [@server] [<code class="option">-b <em class="replaceable"><code>address</code></em></code>] [<code class="option">-c <em class="replaceable"><code>class</code></em></code>] [<code class="option">-f <em class="replaceable"><code>filename</code></em></code>] [<code class="option">-k <em class="replaceable"><code>filename</code></em></code>] [<code class="option">-p <em class="replaceable"><code>port#</code></em></code>] [<code class="option">-q <em class="replaceable"><code>name</code></em></code>] [<code class="option">-t <em class="replaceable"><code>type</code></em></code>] [<code class="option">-x <em class="replaceable"><code>addr</code></em></code>] [<code class="option">-y <em class="replaceable"><code>name:key</code></em></code>] [<code class="option">-4</code>] [<code class="option">-6</code>] [name] [type] [class] [queryopt...]</p></div>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews<div class="cmdsynopsis"><p><code class="command">dig</code> [<code class="option">-h</code>]</p></div>
28b3569d6248168e6c00caab951521cc8141a49dAutomatic Updater<div class="cmdsynopsis"><p><code class="command">dig</code> [global-queryopt...] [query...]</p></div>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews<p><span><strong class="command">dig</strong></span>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews (domain information groper) is a flexible tool
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews for interrogating DNS name servers. It performs DNS lookups and
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews displays the answers that are returned from the name server(s) that
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews were queried. Most DNS administrators use <span><strong class="command">dig</strong></span> to
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews troubleshoot DNS problems because of its flexibility, ease of use and
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews clarity of output. Other lookup tools tend to have less functionality
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews than <span><strong class="command">dig</strong></span>.
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews Although <span><strong class="command">dig</strong></span> is normally used with
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews command-line
575e15fed997a3ad1cb35c5b9ef34ab24ce47e72Automatic Updater arguments, it also has a batch mode of operation for reading lookup
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews requests from a file. A brief summary of its command-line arguments
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews and options is printed when the <code class="option">-h</code> option is given.
575e15fed997a3ad1cb35c5b9ef34ab24ce47e72Automatic Updater Unlike earlier versions, the BIND9 implementation of
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews <span><strong class="command">dig</strong></span> allows multiple lookups to be issued
d71e2e0c61df16ff37c9934c371a4a60c08974f7Mark Andrews command line.
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews Unless it is told to query a specific name server,
ad671240d635376dd8681550eebee799d2e3d1fdAutomatic Updater <span><strong class="command">dig</strong></span> will try each of the servers listed
ad671240d635376dd8681550eebee799d2e3d1fdAutomatic Updater <code class="filename">/etc/resolv.conf</code>.
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews When no command line arguments or options are given, will perform an
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews NS query for "." (the root).
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews It is possible to set per-user defaults for <span><strong class="command">dig</strong></span> via
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews <code class="filename">${HOME}/.digrc</code>. This file is read and
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews any options in it
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater are applied before the command line arguments.
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater<a name="id2514802"></a><h2>SIMPLE USAGE</h2>
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater A typical invocation of <span><strong class="command">dig</strong></span> looks like:
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater<pre class="programlisting"> dig @server name type </pre>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews<dt><span class="term"><code class="constant">server</code></span></dt>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews is the name or IP address of the name server to query. This can
731cc132f22dbc9e0ecd7035dce314a61076d31bAutomatic Updater address in dotted-decimal notation or an IPv6
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews address in colon-delimited notation. When the supplied
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews <em class="parameter"><code>server</code></em> argument is a
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater <span><strong class="command">dig</strong></span> resolves that name before
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews querying that name
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews server. If no <em class="parameter"><code>server</code></em>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews argument is provided,
ca67ebfe9eef0b8f04179f7e511a19e0337a5422Automatic Updater <span><strong class="command">dig</strong></span> consults <code class="filename">/etc/resolv.conf</code>
ca67ebfe9eef0b8f04179f7e511a19e0337a5422Automatic Updater and queries the name servers listed there. The reply from the
8e821eea5f57ac47a94305aa7ab0c3570d92a311Automatic Updater server that responds is displayed.
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews<dt><span class="term"><code class="constant">name</code></span></dt>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews is the name of the resource record that is to be looked up.
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater<dt><span class="term"><code class="constant">type</code></span></dt>
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater indicates what type of query is required —
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater ANY, A, MX, SIG, etc.
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater <em class="parameter"><code>type</code></em> can be any valid query
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater <em class="parameter"><code>type</code></em> argument is supplied,
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater <span><strong class="command">dig</strong></span> will perform a lookup for an
2f8d63983c297c62630044d28a6f66676b4d339dMark Andrews The <code class="option">-b</code> option sets the source IP address of the query
2f8d63983c297c62630044d28a6f66676b4d339dMark Andrews to <em class="parameter"><code>address</code></em>. This must be a valid
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater one of the host's network interfaces or "0.0.0.0" or "::". An optional
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater may be specified by appending "#<port>"
8e821eea5f57ac47a94305aa7ab0c3570d92a311Automatic Updater The default query class (IN for internet) is overridden by the
8e821eea5f57ac47a94305aa7ab0c3570d92a311Automatic Updater <code class="option">-c</code> option. <em class="parameter"><code>class</code></em> is
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater class, such as HS for Hesiod records or CH for CHAOSNET records.
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater The <code class="option">-f</code> option makes <span><strong class="command">dig </strong></span>
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater in batch mode by reading a list of lookup requests to process from the
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater file <em class="parameter"><code>filename</code></em>. The file contains a
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater queries, one per line. Each entry in the file should be organised in
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater the same way they would be presented as queries to
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews <span><strong class="command">dig</strong></span> using the command-line interface.
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews If a non-standard port number is to be queried, the
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews <code class="option">-p</code> option is used. <em class="parameter"><code>port#</code></em> is
8ec3c085233cedb22b05da36e2773c8f357a7e45Automatic Updater the port number that <span><strong class="command">dig</strong></span> will send its
8ec3c085233cedb22b05da36e2773c8f357a7e45Automatic Updater instead of the standard DNS port number 53. This option would be used
8ec3c085233cedb22b05da36e2773c8f357a7e45Automatic Updater to test a name server that has been configured to listen for queries
64affc54f96a2c71cbd10ed71e246ce0746259aaAutomatic Updater on a non-standard port number.
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews The <code class="option">-4</code> option forces <span><strong class="command">dig</strong></span>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews use IPv4 query transport. The <code class="option">-6</code> option forces
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews <span><strong class="command">dig</strong></span> to only use IPv6 query transport.
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews The <code class="option">-t</code> option sets the query type to
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater <em class="parameter"><code>type</code></em>. It can be any valid query type
f8e3e03cacd16ffb923a9603fca23a9e1a1fee07Automatic Updater supported in BIND9. The default query type "A", unless the
f8e3e03cacd16ffb923a9603fca23a9e1a1fee07Automatic Updater <code class="option">-x</code> option is supplied to indicate a reverse lookup.
f8e3e03cacd16ffb923a9603fca23a9e1a1fee07Automatic Updater A zone transfer can be requested by specifying a type of AXFR. When
f8e3e03cacd16ffb923a9603fca23a9e1a1fee07Automatic Updater an incremental zone transfer (IXFR) is required,
f8e3e03cacd16ffb923a9603fca23a9e1a1fee07Automatic Updater <em class="parameter"><code>type</code></em> is set to <code class="literal">ixfr=N</code>.
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews The incremental zone transfer will contain the changes made to the zone
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews since the serial number in the zone's SOA record was
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews The <code class="option">-q</code> option sets the query name to
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews <em class="parameter"><code>name</code></em>. This useful do distingish the
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews <em class="parameter"><code>name</code></em> from other arguements.
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews Reverse lookups - mapping addresses to names - are simplified by the
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews <code class="option">-x</code> option. <em class="parameter"><code>addr</code></em> is
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater address in dotted-decimal notation, or a colon-delimited IPv6 address.
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater When this option is used, there is no need to provide the
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater <em class="parameter"><code>name</code></em>, <em class="parameter"><code>class</code></em> and
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews <em class="parameter"><code>type</code></em> arguments. <span><strong class="command">dig</strong></span>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews automatically performs a lookup for a name like
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater <code class="literal">11.12.13.10.in-addr.arpa</code> and sets the
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews query type and
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews class to PTR and IN respectively. By default, IPv6 addresses are
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews looked up using nibble format under the IP6.ARPA domain.
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews To use the older RFC1886 method using the IP6.INT domain
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews specify the <code class="option">-i</code> option. Bit string labels (RFC2874)
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews are now experimental and are not attempted.
575e15fed997a3ad1cb35c5b9ef34ab24ce47e72Automatic Updater To sign the DNS queries sent by <span><strong class="command">dig</strong></span> and
575e15fed997a3ad1cb35c5b9ef34ab24ce47e72Automatic Updater responses using transaction signatures (TSIG), specify a TSIG key file
575e15fed997a3ad1cb35c5b9ef34ab24ce47e72Automatic Updater using the <code class="option">-k</code> option. You can also specify the TSIG
575e15fed997a3ad1cb35c5b9ef34ab24ce47e72Automatic Updater key itself on the command line using the <code class="option">-y</code> option;
575e15fed997a3ad1cb35c5b9ef34ab24ce47e72Automatic Updater <em class="parameter"><code>name</code></em> is the name of the TSIG key and
575e15fed997a3ad1cb35c5b9ef34ab24ce47e72Automatic Updater <em class="parameter"><code>key</code></em> is the actual key. The key is a
575e15fed997a3ad1cb35c5b9ef34ab24ce47e72Automatic Updater encoded string, typically generated by
575e15fed997a3ad1cb35c5b9ef34ab24ce47e72Automatic Updater <span class="citerefentry"><span class="refentrytitle">dnssec-keygen</span>(8)</span>.
575e15fed997a3ad1cb35c5b9ef34ab24ce47e72Automatic Updater Caution should be taken when using the <code class="option">-y</code> option on
575e15fed997a3ad1cb35c5b9ef34ab24ce47e72Automatic Updater multi-user systems as the key can be visible in the output from
575e15fed997a3ad1cb35c5b9ef34ab24ce47e72Automatic Updater <span class="citerefentry"><span class="refentrytitle">ps</span>(1)</span>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews or in the shell's history file. When
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews using TSIG authentication with <span><strong class="command">dig</strong></span>, the name
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews server that is queried needs to know the key and algorithm that is
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews being used. In BIND, this is done by providing appropriate
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews <span><strong class="command">key</strong></span> and <span><strong class="command">server</strong></span> statements in
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews<p><span><strong class="command">dig</strong></span>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews provides a number of query options which affect
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews the way in which lookups are made and the results displayed. Some of
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews these set or reset flag bits in the query header, some determine which
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews sections of the answer get printed, and others determine the timeout
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews and retry strategies.
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater Each query option is identified by a keyword preceded by a plus sign
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater (<code class="literal">+</code>). Some keywords set or reset an
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater option. These may be preceded
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater by the string <code class="literal">no</code> to negate the meaning of
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater that keyword. Other
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater keywords assign values to options like the timeout interval. They
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater have the form <code class="option">+keyword=value</code>.
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater The query options are:
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater<dt><span class="term"><code class="option">+[no]tcp</code></span></dt>
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater Use [do not use] TCP when querying name servers. The default
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater behaviour is to use UDP unless an AXFR or IXFR query is
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews requested, in
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews which case a TCP connection is used.
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews<dt><span class="term"><code class="option">+[no]vc</code></span></dt>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews Use [do not use] TCP when querying name servers. This alternate
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews syntax to <em class="parameter"><code>+[no]tcp</code></em> is
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews provided for backwards
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews compatibility. The "vc" stands for "virtual circuit".
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews<dt><span class="term"><code class="option">+[no]ignore</code></span></dt>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews Ignore truncation in UDP responses instead of retrying with TCP.
575e15fed997a3ad1cb35c5b9ef34ab24ce47e72Automatic Updater default, TCP retries are performed.
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater<dt><span class="term"><code class="option">+domain=somename</code></span></dt>
2895f101b5585a19015ac2c2c1e1812ac467fa12Automatic Updater Set the search list to contain the single domain
2895f101b5585a19015ac2c2c1e1812ac467fa12Automatic Updater <em class="parameter"><code>somename</code></em>, as if specified in
2895f101b5585a19015ac2c2c1e1812ac467fa12Automatic Updater <span><strong class="command">domain</strong></span> directive in
2895f101b5585a19015ac2c2c1e1812ac467fa12Automatic Updater <code class="filename">/etc/resolv.conf</code>, and enable
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater processing as if the <em class="parameter"><code>+search</code></em>
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater option were given.
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater<dt><span class="term"><code class="option">+[no]search</code></span></dt>
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater Use [do not use] the search list defined by the searchlist or
f8e3e03cacd16ffb923a9603fca23a9e1a1fee07Automatic Updater directive in <code class="filename">resolv.conf</code> (if
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater The search list is not used by default.
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater<dt><span class="term"><code class="option">+[no]showsearch</code></span></dt>
f8e3e03cacd16ffb923a9603fca23a9e1a1fee07Automatic Updater Perform [do not perform] a search showing intermediate
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater<dt><span class="term"><code class="option">+[no]defname</code></span></dt>
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater Deprecated, treated as a synonym for <em class="parameter"><code>+[no]search</code></em>
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater<dt><span class="term"><code class="option">+[no]aaonly</code></span></dt>
f8e3e03cacd16ffb923a9603fca23a9e1a1fee07Automatic Updater Sets the "aa" flag in the query.
f8e3e03cacd16ffb923a9603fca23a9e1a1fee07Automatic Updater<dt><span class="term"><code class="option">+[no]aaflag</code></span></dt>
f8e3e03cacd16ffb923a9603fca23a9e1a1fee07Automatic Updater A synonym for <em class="parameter"><code>+[no]aaonly</code></em>.
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater<dt><span class="term"><code class="option">+[no]adflag</code></span></dt>
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater Set [do not set] the AD (authentic data) bit in the query. The
f8e3e03cacd16ffb923a9603fca23a9e1a1fee07Automatic Updater currently has a standard meaning only in responses, not in
0a7ed88633a680bb881868b75ded4d09a7bbbc50Automatic Updater but the ability to set the bit in the query is provided for
575e15fed997a3ad1cb35c5b9ef34ab24ce47e72Automatic Updater<dt><span class="term"><code class="option">+[no]cdflag</code></span></dt>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews Set [do not set] the CD (checking disabled) bit in the query.
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews requests the server to not perform DNSSEC validation of
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews<dt><span class="term"><code class="option">+[no]cl</code></span></dt>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews Display [do not display] the CLASS when printing the record.
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews<dt><span class="term"><code class="option">+[no]ttlid</code></span></dt>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews Display [do not display] the TTL when printing the record.
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews<dt><span class="term"><code class="option">+[no]recurse</code></span></dt>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews Toggle the setting of the RD (recursion desired) bit in the
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews This bit is set by default, which means <span><strong class="command">dig</strong></span>
d71e2e0c61df16ff37c9934c371a4a60c08974f7Mark Andrews normally sends recursive queries. Recursion is automatically
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews when the <em class="parameter"><code>+nssearch</code></em> or
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews <em class="parameter"><code>+trace</code></em> query options are
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews<dt><span class="term"><code class="option">+[no]nssearch</code></span></dt>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews When this option is set, <span><strong class="command">dig</strong></span>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews attempts to find the
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews authoritative name servers for the zone containing the name
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews looked up and display the SOA record that each name server has
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews<dt><span class="term"><code class="option">+[no]trace</code></span></dt>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews Toggle tracing of the delegation path from the root name servers
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews the name being looked up. Tracing is disabled by default. When
d71e2e0c61df16ff37c9934c371a4a60c08974f7Mark Andrews tracing is enabled, <span><strong class="command">dig</strong></span> makes
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews iterative queries to
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews resolve the name being looked up. It will follow referrals from
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews root servers, showing the answer from each server that was used
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews resolve the lookup.
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews<dt><span class="term"><code class="option">+[no]cmd</code></span></dt>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews toggles the printing of the initial comment in the output
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews the version of <span><strong class="command">dig</strong></span> and the query
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews options that have
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews been applied. This comment is printed by default.
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews<dt><span class="term"><code class="option">+[no]short</code></span></dt>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews Provide a terse answer. The default is to print the answer in a
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews verbose form.
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews<dt><span class="term"><code class="option">+[no]identify</code></span></dt>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews Show [or do not show] the IP address and port number that
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews supplied the
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews answer when the <em class="parameter"><code>+short</code></em> option
575e15fed997a3ad1cb35c5b9ef34ab24ce47e72Automatic Updater is enabled. If
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews short form answers are requested, the default is not to show the
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews source address and port number of the server that provided the
8e821eea5f57ac47a94305aa7ab0c3570d92a311Automatic Updater<dt><span class="term"><code class="option">+[no]comments</code></span></dt>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews Toggle the display of comment lines in the output. The default
575e15fed997a3ad1cb35c5b9ef34ab24ce47e72Automatic Updater print comments.
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews<dt><span class="term"><code class="option">+[no]stats</code></span></dt>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews This query option toggles the printing of statistics: when the
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews was made, the size of the reply and so on. The default
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews behaviour is
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews to print the query statistics.
28b3569d6248168e6c00caab951521cc8141a49dAutomatic Updater<dt><span class="term"><code class="option">+[no]qr</code></span></dt>
2cbb4ab75757fbb656997a82c14ca07db37d481aAutomatic Updater Print [do not print] the query as it is sent.
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews By default, the query is not printed.
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews<dt><span class="term"><code class="option">+[no]question</code></span></dt>
28b3569d6248168e6c00caab951521cc8141a49dAutomatic Updater Print [do not print] the question section of a query when an
2cbb4ab75757fbb656997a82c14ca07db37d481aAutomatic Updater returned. The default is to print the question section as a
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews<dt><span class="term"><code class="option">+[no]answer</code></span></dt>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews Display [do not display] the answer section of a reply. The
<em class="parameter"><code>name</code></em> to <em class="parameter"><code>D</code></em> for it to be