man.dig.html revision 9c1210a508fa246d62ca7d9a52f1d8b19d0ccf48
5181c2afafac4c39b4d5d9d8dd14e6ba0d227db2Reza Sabdar - Copyright (C) 2004-2013 Internet Systems Consortium, Inc. ("ISC")
2efb3bf9c7f4cf34038896f1431531c93d3f57c2Jan Kryl - Copyright (C) 2000-2003 Internet Software Consortium.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar - Permission to use, copy, modify, and/or distribute this software for any
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar - purpose with or without fee is hereby granted, provided that the above
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar - copyright notice and this permission notice appear in all copies.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar - THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar - REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar - AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar - INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar - LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar - OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar - PERFORMANCE OF THIS SOFTWARE.
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2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<a name="man.dig"></a><div class="titlepage"></div>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<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">-m</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>[<span class="optional">hmac:</span>]name:key</code></em></code>] [<code class="option">-4</code>] [<code class="option">-6</code>] [name] [type] [class] [queryopt...]</p></div>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<div class="cmdsynopsis"><p><code class="command">dig</code> [<code class="option">-h</code>]</p></div>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<div class="cmdsynopsis"><p><code class="command">dig</code> [global-queryopt...] [query...]</p></div>
b6b15642ffbc95b31765357dc6cc036b590c3a97Reza Sabdar<p><span><strong class="command">dig</strong></span>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar (domain information groper) is a flexible tool
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar for interrogating DNS name servers. It performs DNS lookups and
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar displays the answers that are returned from the name server(s) that
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar were queried. Most DNS administrators use <span><strong class="command">dig</strong></span> to
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar troubleshoot DNS problems because of its flexibility, ease of use and
2efb3bf9c7f4cf34038896f1431531c93d3f57c2Jan Kryl clarity of output. Other lookup tools tend to have less functionality
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar than <span><strong class="command">dig</strong></span>.
2efb3bf9c7f4cf34038896f1431531c93d3f57c2Jan Kryl Although <span><strong class="command">dig</strong></span> is normally used with
2efb3bf9c7f4cf34038896f1431531c93d3f57c2Jan Kryl command-line
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar arguments, it also has a batch mode of operation for reading lookup
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar requests from a file. A brief summary of its command-line arguments
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar and options is printed when the <code class="option">-h</code> option is given.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Unlike earlier versions, the BIND 9 implementation of
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <span><strong class="command">dig</strong></span> allows multiple lookups to be issued
2efb3bf9c7f4cf34038896f1431531c93d3f57c2Jan Kryl command line.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Unless it is told to query a specific name server,
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <span><strong class="command">dig</strong></span> will try each of the servers listed in
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <code class="filename">/etc/resolv.conf</code>. If no usable server addreses
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar are found, <span><strong class="command">dig</strong></span> will send the query to the local
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar When no command line arguments or options are given,
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <span><strong class="command">dig</strong></span> will perform an NS query for "." (the root).
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar It is possible to set per-user defaults for <span><strong class="command">dig</strong></span> via
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <code class="filename">${HOME}/.digrc</code>. This file is read and
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar any options in it
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar are applied before the command line arguments.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar The IN and CH class names overlap with the IN and CH top level
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar domains names. Either use the <code class="option">-t</code> and
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <code class="option">-c</code> options to specify the type and class,
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar use the <code class="option">-q</code> the specify the domain name, or
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar use "IN." and "CH." when looking up these top level domains.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar A typical invocation of <span><strong class="command">dig</strong></span> looks like:
5181c2afafac4c39b4d5d9d8dd14e6ba0d227db2Reza Sabdar<pre class="programlisting"> dig @server name type </pre>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="constant">server</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar is the name or IP address of the name server to query. This
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar can be an IPv4 address in dotted-decimal notation or an IPv6
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar address in colon-delimited notation. When the supplied
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <em class="parameter"><code>server</code></em> argument is a hostname,
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <span><strong class="command">dig</strong></span> resolves that name before querying
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar that name server.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar If no <em class="parameter"><code>server</code></em> argument is
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar provided, <span><strong class="command">dig</strong></span> consults
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <code class="filename">/etc/resolv.conf</code>; if an
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar address is found there, it queries the name server at
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar that address. If either of the <code class="option">-4</code> or
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <code class="option">-6</code> options are in use, then
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar only addresses for the corresponding transport
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar will be tried. If no usable addresses are found,
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <span><strong class="command">dig</strong></span> will send the query to the
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar local host. The reply from the name server that
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar responds is displayed.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="constant">name</code></span></dt>
fb4eb4e8c8161158740a5a4057e45ec942165dc2Reza Sabdar is the name of the resource record that is to be looked up.
fb4eb4e8c8161158740a5a4057e45ec942165dc2Reza Sabdar<dt><span class="term"><code class="constant">type</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar indicates what type of query is required —
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar ANY, A, MX, SIG, etc.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <em class="parameter"><code>type</code></em> can be any valid query
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <em class="parameter"><code>type</code></em> argument is supplied,
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <span><strong class="command">dig</strong></span> will perform a lookup for an
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar The <code class="option">-b</code> option sets the source IP address of the query
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar to <em class="parameter"><code>address</code></em>. This must be a valid
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar one of the host's network interfaces or "0.0.0.0" or "::". An optional
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar may be specified by appending "#<port>"
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar The default query class (IN for internet) is overridden by the
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <code class="option">-c</code> option. <em class="parameter"><code>class</code></em> is
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar class, such as HS for Hesiod records or CH for Chaosnet records.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar The <code class="option">-f</code> option makes <span><strong class="command">dig </strong></span>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar in batch mode by reading a list of lookup requests to process from the
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar file <em class="parameter"><code>filename</code></em>. The file contains a
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar queries, one per line. Each entry in the file should be organized in
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar the same way they would be presented as queries to
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <span><strong class="command">dig</strong></span> using the command-line interface.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar The <code class="option">-m</code> option enables memory usage debugging.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar If a non-standard port number is to be queried, the
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <code class="option">-p</code> option is used. <em class="parameter"><code>port#</code></em> is
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar the port number that <span><strong class="command">dig</strong></span> will send its
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar instead of the standard DNS port number 53. This option would be used
2efb3bf9c7f4cf34038896f1431531c93d3f57c2Jan Kryl to test a name server that has been configured to listen for queries
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar on a non-standard port number.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar The <code class="option">-4</code> option forces <span><strong class="command">dig</strong></span>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar use IPv4 query transport. The <code class="option">-6</code> option forces
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <span><strong class="command">dig</strong></span> to only use IPv6 query transport.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar The <code class="option">-t</code> option sets the query type to
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <em class="parameter"><code>type</code></em>. It can be any valid query type
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar supported in BIND 9. The default query type is "A", unless the
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <code class="option">-x</code> option is supplied to indicate a reverse lookup.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar A zone transfer can be requested by specifying a type of AXFR. When
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar an incremental zone transfer (IXFR) is required,
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <em class="parameter"><code>type</code></em> is set to <code class="literal">ixfr=N</code>.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar The incremental zone transfer will contain the changes made to the zone
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar since the serial number in the zone's SOA record was
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar The <code class="option">-q</code> option sets the query name to
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <em class="parameter"><code>name</code></em>. This useful do distinguish the
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <em class="parameter"><code>name</code></em> from other arguments.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Reverse lookups — mapping addresses to names — are simplified by the
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <code class="option">-x</code> option. <em class="parameter"><code>addr</code></em> is
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar address in dotted-decimal notation, or a colon-delimited IPv6 address.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar When this option is used, there is no need to provide the
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <em class="parameter"><code>name</code></em>, <em class="parameter"><code>class</code></em> and
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <em class="parameter"><code>type</code></em> arguments. <span><strong class="command">dig</strong></span>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar automatically performs a lookup for a name like
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <code class="literal">11.12.13.10.in-addr.arpa</code> and sets the
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar query type and
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar class to PTR and IN respectively. By default, IPv6 addresses are
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar looked up using nibble format under the IP6.ARPA domain.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar To use the older RFC1886 method using the IP6.INT domain
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar specify the <code class="option">-i</code> option. Bit string labels (RFC2874)
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar are now experimental and are not attempted.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar To sign the DNS queries sent by <span><strong class="command">dig</strong></span> and
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar responses using transaction signatures (TSIG), specify a TSIG key file
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar using the <code class="option">-k</code> option. You can also specify the TSIG
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar key itself on the command line using the <code class="option">-y</code> option;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <em class="parameter"><code>hmac</code></em> is the type of the TSIG, default HMAC-MD5,
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <em class="parameter"><code>name</code></em> is the name of the TSIG key and
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <em class="parameter"><code>key</code></em> is the actual key. The key is a
859b77458b5f7417d1e612e13d69159c0d6a894eReza Sabdar encoded string, typically generated by
2efb3bf9c7f4cf34038896f1431531c93d3f57c2Jan Kryl <span class="citerefentry"><span class="refentrytitle">dnssec-keygen</span>(8)</span>.
2efb3bf9c7f4cf34038896f1431531c93d3f57c2Jan Kryl Caution should be taken when using the <code class="option">-y</code> option on
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar multi-user systems as the key can be visible in the output from
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <span class="citerefentry"><span class="refentrytitle">ps</span>(1)</span>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar or in the shell's history file. When
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar using TSIG authentication with <span><strong class="command">dig</strong></span>, the name
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar server that is queried needs to know the key and algorithm that is
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar being used. In BIND, this is done by providing appropriate
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <span><strong class="command">key</strong></span> and <span><strong class="command">server</strong></span> statements in
fb4eb4e8c8161158740a5a4057e45ec942165dc2Reza Sabdar<p><span><strong class="command">dig</strong></span>
fb4eb4e8c8161158740a5a4057e45ec942165dc2Reza Sabdar provides a number of query options which affect
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar the way in which lookups are made and the results displayed. Some of
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar these set or reset flag bits in the query header, some determine which
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar sections of the answer get printed, and others determine the timeout
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar and retry strategies.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Each query option is identified by a keyword preceded by a plus sign
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar (<code class="literal">+</code>). Some keywords set or reset an
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar option. These may be preceded
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar by the string <code class="literal">no</code> to negate the meaning of
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar that keyword. Other
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar keywords assign values to options like the timeout interval. They
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar have the form <code class="option">+keyword=value</code>.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar The query options are:
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]tcp</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Use [do not use] TCP when querying name servers. The default
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar behavior is to use UDP unless an AXFR or IXFR query is
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar requested, in
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar which case a TCP connection is used.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]vc</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Use [do not use] TCP when querying name servers. This alternate
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar syntax to <em class="parameter"><code>+[no]tcp</code></em> is
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar provided for backwards
c9fd6b31f4fa1345ad799549dc0f1101b9cef127Reza Sabdar compatibility. The "vc" stands for "virtual circuit".
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]ignore</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Ignore truncation in UDP responses instead of retrying with TCP.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar default, TCP retries are performed.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+domain=somename</code></span></dt>
b6b15642ffbc95b31765357dc6cc036b590c3a97Reza Sabdar Set the search list to contain the single domain
fb4eb4e8c8161158740a5a4057e45ec942165dc2Reza Sabdar <em class="parameter"><code>somename</code></em>, as if specified in
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <span><strong class="command">domain</strong></span> directive in
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <code class="filename">/etc/resolv.conf</code>, and enable
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar processing as if the <em class="parameter"><code>+search</code></em>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar option were given.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]search</code></span></dt>
fb4eb4e8c8161158740a5a4057e45ec942165dc2Reza Sabdar Use [do not use] the search list defined by the searchlist or
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar directive in <code class="filename">resolv.conf</code> (if
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar The search list is not used by default.
fb4eb4e8c8161158740a5a4057e45ec942165dc2Reza Sabdar<dt><span class="term"><code class="option">+[no]showsearch</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Perform [do not perform] a search showing intermediate
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]defname</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Deprecated, treated as a synonym for <em class="parameter"><code>+[no]search</code></em>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]aaonly</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Sets the "aa" flag in the query.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]aaflag</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar A synonym for <em class="parameter"><code>+[no]aaonly</code></em>.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]adflag</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Set [do not set] the AD (authentic data) bit in the
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar query. This requests the server to return whether
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar all of the answer and authority sections have all
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar been validated as secure according to the security
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar policy of the server. AD=1 indicates that all records
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar have been validated as secure and the answer is not
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar from a OPT-OUT range. AD=0 indicate that some part
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar of the answer was insecure or not validated. This
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar bit is set by default.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]cdflag</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Set [do not set] the CD (checking disabled) bit in the query.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar requests the server to not perform DNSSEC validation of
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]cl</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Display [do not display] the CLASS when printing the record.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]ttlid</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Display [do not display] the TTL when printing the record.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]recurse</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Toggle the setting of the RD (recursion desired) bit
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar in the query. This bit is set by default, which means
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <span><strong class="command">dig</strong></span> normally sends recursive
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar queries. Recursion is automatically disabled when
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar the <em class="parameter"><code>+nssearch</code></em> or
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <em class="parameter"><code>+trace</code></em> query options are used.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]nssearch</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar When this option is set, <span><strong class="command">dig</strong></span>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar attempts to find the
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar authoritative name servers for the zone containing the name
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar looked up and display the SOA record that each name server has
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]trace</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Toggle tracing of the delegation path from the root
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar name servers for the name being looked up. Tracing
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar is disabled by default. When tracing is enabled,
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <span><strong class="command">dig</strong></span> makes iterative queries to
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar resolve the name being looked up. It will follow
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar referrals from the root servers, showing the answer
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar from each server that was used to resolve the lookup.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <span><strong class="command">+dnssec</strong></span> is also set when +trace is
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar set to better emulate the default queries from a nameserver.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]cmd</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Toggles the printing of the initial comment in the output
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar the version of <span><strong class="command">dig</strong></span> and the query
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar options that have
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar been applied. This comment is printed by default.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]short</code></span></dt>
7bc22e45a20f905cdd06bb98c98a5c8be7fd25c0Reza Sabdar Provide a terse answer. The default is to print the answer in a
7bc22e45a20f905cdd06bb98c98a5c8be7fd25c0Reza Sabdar verbose form.
7bc22e45a20f905cdd06bb98c98a5c8be7fd25c0Reza Sabdar<dt><span class="term"><code class="option">+[no]identify</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Show [or do not show] the IP address and port number that
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar supplied the
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar answer when the <em class="parameter"><code>+short</code></em> option
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar is enabled. If
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar short form answers are requested, the default is not to show the
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar source address and port number of the server that provided the
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]comments</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Toggle the display of comment lines in the output. The default
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar is to print comments.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]rrcomments</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Toggle the display of per-record comments in the output (for
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar example, human-readable key information about DNSKEY records).
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar The default is not to print record comments unless multiline
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar mode is active.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+split=W</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Split long hex- or base64-formatted fields in resource
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar records into chunks of <em class="parameter"><code>W</code></em> characters
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar (where <em class="parameter"><code>W</code></em> is rounded up to the nearest
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar multiple of 4).
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <em class="parameter"><code>+nosplit</code></em> or
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <em class="parameter"><code>+split=0</code></em> causes fields not to be
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar split at all. The default is 56 characters, or 44 characters
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar when multiline mode is active.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]stats</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar This query option toggles the printing of statistics: when the
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar was made, the size of the reply and so on. The default
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar to print the query statistics.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]qr</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Print [do not print] the query as it is sent.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar By default, the query is not printed.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]question</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Print [do not print] the question section of a query when an
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar returned. The default is to print the question section as a
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar<dt><span class="term"><code class="option">+[no]answer</code></span></dt>
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar Display [do not display] the answer section of a reply. The
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar is to display it.
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar<dt><span class="term"><code class="option">+[no]authority</code></span></dt>
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar Display [do not display] the authority section of a reply. The
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar default is to display it.
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar<dt><span class="term"><code class="option">+[no]additional</code></span></dt>
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar Display [do not display] the additional section of a reply.
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar The default is to display it.
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar<dt><span class="term"><code class="option">+[no]all</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Set or clear all display flags.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+time=T</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Sets the timeout for a query to
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <em class="parameter"><code>T</code></em> seconds. The default
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar timeout is 5 seconds.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar An attempt to set <em class="parameter"><code>T</code></em> to less
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar than 1 will result
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar in a query timeout of 1 second being applied.
b6b15642ffbc95b31765357dc6cc036b590c3a97Reza Sabdar<dt><span class="term"><code class="option">+tries=T</code></span></dt>
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar Sets the number of times to try UDP queries to server to
b6b15642ffbc95b31765357dc6cc036b590c3a97Reza Sabdar <em class="parameter"><code>T</code></em> instead of the default, 3.
b6b15642ffbc95b31765357dc6cc036b590c3a97Reza Sabdar <em class="parameter"><code>T</code></em> is less than or equal to
b6b15642ffbc95b31765357dc6cc036b590c3a97Reza Sabdar zero, the number of
b6b15642ffbc95b31765357dc6cc036b590c3a97Reza Sabdar tries is silently rounded up to 1.
fb4eb4e8c8161158740a5a4057e45ec942165dc2Reza Sabdar<dt><span class="term"><code class="option">+retry=T</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Sets the number of times to retry UDP queries to server to
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <em class="parameter"><code>T</code></em> instead of the default, 2.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <em class="parameter"><code>+tries</code></em>, this does not include
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+ndots=D</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Set the number of dots that have to appear in
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <em class="parameter"><code>name</code></em> to <em class="parameter"><code>D</code></em> for it to be
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar considered absolute. The default value is that defined using
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar ndots statement in <code class="filename">/etc/resolv.conf</code>, or 1 if no
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar ndots statement is present. Names with fewer dots are
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar interpreted as
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar relative names and will be searched for in the domains listed in
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <code class="option">search</code> or <code class="option">domain</code> directive in
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+bufsize=B</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Set the UDP message buffer size advertised using EDNS0 to
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <em class="parameter"><code>B</code></em> bytes. The maximum and minimum sizes
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar of this buffer are 65535 and 0 respectively. Values outside
fb4eb4e8c8161158740a5a4057e45ec942165dc2Reza Sabdar this range are rounded up or down appropriately.
fb4eb4e8c8161158740a5a4057e45ec942165dc2Reza Sabdar Values other than zero will cause a EDNS query to be sent.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+edns=#</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Specify the EDNS version to query with. Valid values
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar are 0 to 255. Setting the EDNS version will cause
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar a EDNS query to be sent. <code class="option">+noedns</code>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar clears the remembered EDNS version. EDNS is set to
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar 0 by default.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]multiline</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Print records like the SOA records in a verbose multi-line
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar format with human-readable comments. The default is to print
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar each record on a single line, to facilitate machine parsing
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar of the <span><strong class="command">dig</strong></span> output.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]onesoa</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Print only one (starting) SOA record when performing
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar an AXFR. The default is to print both the starting and
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar ending SOA records.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]fail</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Do not try the next server if you receive a SERVFAIL. The
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar to not try the next server which is the reverse of normal stub
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]besteffort</code></span></dt>
2efb3bf9c7f4cf34038896f1431531c93d3f57c2Jan Kryl Attempt to display the contents of messages which are malformed.
2efb3bf9c7f4cf34038896f1431531c93d3f57c2Jan Kryl The default is to not display malformed answers.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]dnssec</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Requests DNSSEC records be sent by setting the DNSSEC OK bit
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar in the OPT record in the additional section of the query.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]sigchase</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Chase DNSSEC signature chains. Requires dig be compiled with
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar -DDIG_SIGCHASE.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+trusted-key=####</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Specifies a file containing trusted keys to be used with
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <code class="option">+sigchase</code>. Each DNSKEY record must be
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar on its own line.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar If not specified, <span><strong class="command">dig</strong></span> will look for
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <code class="filename">/etc/trusted-key.key</code> then
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <code class="filename">trusted-key.key</code> in the current directory.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Requires dig be compiled with -DDIG_SIGCHASE.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]topdown</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar When chasing DNSSEC signature chains perform a top-down
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Requires dig be compiled with -DDIG_SIGCHASE.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<dt><span class="term"><code class="option">+[no]nsid</code></span></dt>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar Include an EDNS name server ID request when sending a query.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<a name="id2666668"></a><h2>MULTIPLE QUERIES</h2>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar The BIND 9 implementation of <span><strong class="command">dig </strong></span>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar specifying multiple queries on the command line (in addition to
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar supporting the <code class="option">-f</code> batch file option). Each of those
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar queries can be supplied with its own set of flags, options and query
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar In this case, each <em class="parameter"><code>query</code></em> argument
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar represent an
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar individual query in the command-line syntax described above. Each
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar consists of any of the standard options and flags, the name to be
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar looked up, an optional query type and class and any query options that
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar should be applied to that query.
fb4eb4e8c8161158740a5a4057e45ec942165dc2Reza Sabdar A global set of query options, which should be applied to all queries,
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar can also be supplied. These global query options must precede the
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar first tuple of name, class, type, options, flags, and query options
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar supplied on the command line. Any global query options (except
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar the <code class="option">+[no]cmd</code> option) can be
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar overridden by a query-specific set of query options. For example:
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdardig +qr www.isc.org any -x 127.0.0.1 isc.org ns +noqr
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar shows how <span><strong class="command">dig</strong></span> could be used from the
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar command line
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar to make three lookups: an ANY query for <code class="literal">www.isc.org</code>, a
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar reverse lookup of 127.0.0.1 and a query for the NS records of
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar A global query option of <em class="parameter"><code>+qr</code></em> is
2efb3bf9c7f4cf34038896f1431531c93d3f57c2Jan Kryl that <span><strong class="command">dig</strong></span> shows the initial query it made
2efb3bf9c7f4cf34038896f1431531c93d3f57c2Jan Kryl lookup. The final query has a local query option of
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <em class="parameter"><code>+noqr</code></em> which means that <span><strong class="command">dig</strong></span>
2efb3bf9c7f4cf34038896f1431531c93d3f57c2Jan Kryl will not print the initial query when it looks up the NS records for
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar If <span><strong class="command">dig</strong></span> has been built with IDN (internationalized
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar domain name) support, it can accept and display non-ASCII domain names.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <span><strong class="command">dig</strong></span> appropriately converts character encoding of
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar domain name before sending a request to DNS server or displaying a
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar reply from the server.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar If you'd like to turn off the IDN support for some reason, defines
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar the <code class="envar">IDN_DISABLE</code> environment variable.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar The IDN support is disabled if the variable is set when
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <span><strong class="command">dig</strong></span> runs.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<p><code class="filename">/etc/resolv.conf</code>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar<p><span class="citerefentry"><span class="refentrytitle">host</span>(1)</span>,
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <span class="citerefentry"><span class="refentrytitle">named</span>(8)</span>,
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar <span class="citerefentry"><span class="refentrytitle">dnssec-keygen</span>(8)</span>,
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar There are probably too many query options.
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