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d6fa26d0adaec6c910115be34fe7a5a5f402c14fMark Andrews<!--
ddccd5811feff696ba460dabfb666ce61040f545Andreas Gustafsson - Copyright (C) 2000-2015 Internet Systems Consortium, Inc. ("ISC")
5347c0fcb04eaea19d9f39795646239f487c6207Tinderbox User -
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein - This Source Code Form is subject to the terms of the Mozilla Public
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ddccd5811feff696ba460dabfb666ce61040f545Andreas Gustafsson<html>
d6fa26d0adaec6c910115be34fe7a5a5f402c14fMark Andrews<head>
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fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User<link rel="home" href="Bv9ARM.html" title="BIND 9 Administrator Reference Manual">
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7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User<tr><th colspan="3" align="center"><span class="application">mdig</span></th></tr>
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7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User<a accesskey="p" href="man.dig.html">Prev</a>�</td>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<th width="60%" align="center">Manual pages</th>
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60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<hr>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User</div>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User<div class="refentry">
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<a name="man.mdig"></a><div class="titlepage"></div>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User<div class="refnamediv">
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<h2>Name</h2>
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User<p><span class="application">mdig</span> &#8212; DNS pipelined lookup utility</p>
e21a2904f02a03fa06b6db04d348f65fe9c67b2bMark Andrews</div>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<div class="refsynopsisdiv">
e21a2904f02a03fa06b6db04d348f65fe9c67b2bMark Andrews<h2>Synopsis</h2>
2eeb74d1cf5355dd98f6d507a10086e16bb08c4bTinderbox User<div class="cmdsynopsis"><p><code class="command">mdig</code> {@server} [<code class="option">-f <em class="replaceable"><code>filename</code></em></code>] [<code class="option">-h</code>] [<code class="option">-v</code>] [<code class="option">-4</code>] [<code class="option">-6</code>] [<code class="option">-b <em class="replaceable"><code>address</code></em></code>] [<code class="option">-p <em class="replaceable"><code>port#</code></em></code>] [<code class="option">-c <em class="replaceable"><code>class</code></em></code>] [<code class="option">-t <em class="replaceable"><code>type</code></em></code>] [<code class="option">-i</code>] [<code class="option">-x <em class="replaceable"><code>addr</code></em></code>] [plusopt...]</p></div>
e21a2904f02a03fa06b6db04d348f65fe9c67b2bMark Andrews<div class="cmdsynopsis"><p><code class="command">mdig</code> {-h}</p></div>
2eeb74d1cf5355dd98f6d507a10086e16bb08c4bTinderbox User<div class="cmdsynopsis"><p><code class="command">mdig</code> [@server] {global-opt...} {
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein {local-opt...}
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User {query}
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User ...}</p></div>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User</div>
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User<div class="refsection">
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User<a name="id-1.14.3.7"></a><h2>DESCRIPTION</h2>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User<p><span class="command"><strong>mdig</strong></span>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User is a multiple/pipelined query version of <span class="command"><strong>dig</strong></span>:
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein instead of waiting for a response after sending each query,
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein it begins by sending all queries. Responses are displayed in
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein the order in which they are received, not in the order the
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein corresponding queries were sent.
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein </p>
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User<p>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein <span class="command"><strong>mdig</strong></span> options are a subset of the
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <span class="command"><strong>dig</strong></span> options, and are divided into "anywhere
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User options" which can occur anywhere, "global options" which must
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein occur before the query name (or they are ignored with a warning),
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User and "local options" which apply to the next query on the command
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User line.
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein </p>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User<p>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User The {@server} option is a mandatory global
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein option. It is the name or IP address of the name server to query.
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User (Unlike <span class="command"><strong>dig</strong></span>, this value is not retrieved from
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <code class="filename">/etc/resolv.conf</code>.) It can be an IPv4 address
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein in dotted-decimal notation, an IPv6 address in colon-delimited
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User notation, or a hostname. When the supplied
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <em class="parameter"><code>server</code></em> argument is a hostname,
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein <span class="command"><strong>mdig</strong></span> resolves that name before querying
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein the name server.
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </p>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User<p><span class="command"><strong>mdig</strong></span>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein provides a number of query options which affect
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User the way in which lookups are made and the results displayed. Some of
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User these set or reset flag bits in the query header, some determine which
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein sections of the answer get printed, and others determine the timeout
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User and retry strategies.
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </p>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<p>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User Each query option is identified by a keyword preceded by a plus
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User sign (<code class="literal">+</code>). Some keywords set or reset an
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User option. These may be preceded by the string <code class="literal">no</code>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User to negate the meaning of that keyword. Other keywords assign
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein values to options like the timeout interval. They have the
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User form <code class="option">+keyword=value</code>.
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </p>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein</div>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User<div class="refsection">
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User<a name="id-1.14.3.8"></a><h2>ANYWHERE OPTIONS</h2>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<p>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User The <code class="option">-f</code> option makes <span class="command"><strong>mdig</strong></span>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User operate in batch mode by reading a list of lookup requests to
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein process from the file <em class="parameter"><code>filename</code></em>. The file
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User contains a number of queries, one per line. Each entry in the
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User file should be organized in the same way they would be presented
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein as queries to <span class="command"><strong>mdig</strong></span> using the command-line interface.
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </p>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User<p>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein The <code class="option">-h</code> causes <span class="command"><strong>mdig</strong></span> to
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User print the detailed help with the full list of options and exit.
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </p>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<p>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User The <code class="option">-v</code> causes <span class="command"><strong>mdig</strong></span> to
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User print the version number and exit.
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein </p>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User</div>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User<div class="refsection">
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<a name="id-1.14.3.9"></a><h2>GLOBAL OPTIONS</h2>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User<p>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User The <code class="option">-4</code> option forces <span class="command"><strong>mdig</strong></span> to
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User only use IPv4 query transport.
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </p>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<p>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User The <code class="option">-6</code> option forces <span class="command"><strong>mdig</strong></span> to
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User only use IPv6 query transport.
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein </p>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User<p>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User The <code class="option">-b</code> option sets the source IP address of the
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein query to <em class="parameter"><code>address</code></em>. This must be a valid
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein address on one of the host's network interfaces or "0.0.0.0" or
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein "::". An optional port may be specified by appending
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein "#&lt;port&gt;"
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein </p>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<p>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User The <code class="option">-p</code> option is used when a non-standard port
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein number is to be queried.
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein <em class="parameter"><code>port#</code></em> is the port number
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein that <span class="command"><strong>mdig</strong></span> will send its queries instead of
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein the standard DNS port number 53. This option would be used to
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein test a name server that has been configured to listen for
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein queries on a non-standard port number.
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein </p>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<p>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User The global query options are:
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </p>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User<div class="variablelist"><dl class="variablelist">
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User<dt><span class="term"><code class="option">+[no]additional</code></span></dt>
61e1dc26d62c2a0059e3ca7efe2ad0f4a5b8df92Mark Andrews<dd><p>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User Display [do not display] the additional section of a
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User reply. The default is to display it.
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </p></dd>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User<dt><span class="term"><code class="option">+[no]all</code></span></dt>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User<dd><p>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User Set or clear all display flags.
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </p></dd>
ddccd5811feff696ba460dabfb666ce61040f545Andreas Gustafsson<dt><span class="term"><code class="option">+[no]answer</code></span></dt>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User<dd><p>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User Display [do not display] the answer section of a
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User reply. The default is to display it.
2eeb74d1cf5355dd98f6d507a10086e16bb08c4bTinderbox User </p></dd>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User<dt><span class="term"><code class="option">+[no]authority</code></span></dt>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User<dd><p>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User Display [do not display] the authority section of a
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein reply. The default is to display it.
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </p></dd>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<dt><span class="term"><code class="option">+[no]besteffort</code></span></dt>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<dd><p>
Attempt to display the contents of messages which are
malformed. The default is to not display malformed
answers.
</p></dd>
<dt><span class="term"><code class="option">+[no]cl</code></span></dt>
<dd><p>
Display [do not display] the CLASS when printing the
record.
</p></dd>
<dt><span class="term"><code class="option">+[no]comments</code></span></dt>
<dd><p>
Toggle the display of comment lines in the output.
The default is to print comments.
</p></dd>
<dt><span class="term"><code class="option">+[no]crypto</code></span></dt>
<dd><p>
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 ]".
</p></dd>
<dt><span class="term"><code class="option">+dscp[=value]</code></span></dt>
<dd><p>
Set the DSCP code point to be used when sending the
query. Valid DSCP code points are in the range
[0..63]. By default no code point is explicitly set.
</p></dd>
<dt><span class="term"><code class="option">+[no]multiline</code></span></dt>
<dd><p>
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 <span class="command"><strong>mdig</strong></span>
output.
</p></dd>
<dt><span class="term"><code class="option">+[no]question</code></span></dt>
<dd><p>
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.
</p></dd>
<dt><span class="term"><code class="option">+[no]rrcomments</code></span></dt>
<dd><p>
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.
</p></dd>
<dt><span class="term"><code class="option">+[no]short</code></span></dt>
<dd><p>
Provide a terse answer. The default is to print the
answer in a verbose form.
</p></dd>
<dt><span class="term"><code class="option">+split=W</code></span></dt>
<dd><p>
Split long hex- or base64-formatted fields in resource
records into chunks of <em class="parameter"><code>W</code></em>
characters (where <em class="parameter"><code>W</code></em> is rounded
up to the nearest multiple of 4).
<em class="parameter"><code>+nosplit</code></em> or
<em class="parameter"><code>+split=0</code></em> causes fields not to
be split at all. The default is 56 characters, or
44 characters when multiline mode is active.
</p></dd>
<dt><span class="term"><code class="option">+[no]tcp</code></span></dt>
<dd><p>
Use [do not use] TCP when querying name servers. The
default behavior is to use UDP.
</p></dd>
<dt><span class="term"><code class="option">+[no]ttlid</code></span></dt>
<dd><p>
Display [do not display] the TTL when printing the
record.
</p></dd>
<dt><span class="term"><code class="option">+[no]ttlunits</code></span></dt>
<dd><p>
Display [do not display] the TTL in friendly human-readable
time units of "s", "m", "h", "d", and "w", representing
seconds, minutes, hours, days and weeks. Implies +ttlid.
</p></dd>
<dt><span class="term"><code class="option">+[no]vc</code></span></dt>
<dd><p>
Use [do not use] TCP when querying name servers. This
alternate syntax to <em class="parameter"><code>+[no]tcp</code></em>
is provided for backwards compatibility. The "vc"
stands for "virtual circuit".
</p></dd>
</dl></div>
<p>
</p>
</div>
<div class="refsection">
<a name="id-1.14.3.10"></a><h2>LOCAL OPTIONS</h2>
<p>
The <code class="option">-c</code> option sets the query class to
<em class="parameter"><code>class</code></em>. It can be any valid query class
which is supported in BIND 9. The default query class is "IN".
</p>
<p>
The <code class="option">-t</code> option sets the query type to
<em class="parameter"><code>type</code></em>. It can be any valid query type
which is supported in BIND 9. The default query type is "A",
unless the <code class="option">-x</code> option is supplied to indicate
a reverse lookup with the "PTR" query type.
</p>
<p>
The <code class="option">-i</code> option sets the reverse domain for
IPv6 addresses to IP6.INT.
</p>
<p>
Reverse lookups &#8212; mapping addresses to names &#8212; are
simplified by the <code class="option">-x</code> option.
<em class="parameter"><code>addr</code></em> is an IPv4
address in dotted-decimal notation, or a colon-delimited IPv6 address.
<span class="command"><strong>mdig</strong></span> automatically performs a lookup for a
query name like <code class="literal">11.12.13.10.in-addr.arpa</code> and
sets the query type and class to PTR and IN respectively.
By default, IPv6 addresses are looked up using nibble format
under the IP6.ARPA domain. To use the older RFC1886 method
using the IP6.INT domain specify the <code class="option">-i</code> option.
</p>
<p>
The local query options are:
</p>
<div class="variablelist"><dl class="variablelist">
<dt><span class="term"><code class="option">+[no]aaflag</code></span></dt>
<dd><p>
A synonym for <em class="parameter"><code>+[no]aaonly</code></em>.
</p></dd>
<dt><span class="term"><code class="option">+[no]aaonly</code></span></dt>
<dd><p>
Sets the "aa" flag in the query.
</p></dd>
<dt><span class="term"><code class="option">+[no]adflag</code></span></dt>
<dd><p>
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.
</p></dd>
<dt><span class="term"><code class="option">+bufsize=B</code></span></dt>
<dd><p>
Set the UDP message buffer size advertised using EDNS0
to <em class="parameter"><code>B</code></em> 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.
</p></dd>
<dt><span class="term"><code class="option">+[no]cdflag</code></span></dt>
<dd><p>
Set [do not set] the CD (checking disabled) bit in
the query. This requests the server to not perform
DNSSEC validation of responses.
</p></dd>
<dt><span class="term"><code class="option">+[no]cookie[<span class="optional">=####</span>]</code></span></dt>
<dd><p>
Send a COOKIE EDNS option, with optional value.
Replaying a COOKIE from a previous response will allow
the server to identify a previous client. The default
is <code class="option">+nocookie</code>.
</p></dd>
<dt><span class="term"><code class="option">+[no]dnssec</code></span></dt>
<dd><p>
Requests DNSSEC records be sent by setting the DNSSEC
OK bit (DO) in the OPT record in the additional section
of the query.
</p></dd>
<dt><span class="term"><code class="option">+[no]edns[=#]</code></span></dt>
<dd><p>
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. <code class="option">+noedns</code>
clears the remembered EDNS version. EDNS is set to
0 by default.
</p></dd>
<dt><span class="term"><code class="option">+[no]ednsflags[=#]</code></span></dt>
<dd><p>
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.
</p></dd>
<dt><span class="term"><code class="option">+[no]ednsopt[=code[:value]]</code></span></dt>
<dd><p>
Specify EDNS option with code point <code class="option">code</code>
and optionally payload of <code class="option">value</code> as a
hexadecimal string. <code class="option">+noednsopt</code>
clears the EDNS options to be sent.
</p></dd>
<dt><span class="term"><code class="option">+[no]expire</code></span></dt>
<dd><p>
Send an EDNS Expire option.
</p></dd>
<dt><span class="term"><code class="option">+[no]nsid</code></span></dt>
<dd><p>
Include an EDNS name server ID request when sending
a query.
</p></dd>
<dt><span class="term"><code class="option">+[no]recurse</code></span></dt>
<dd><p>
Toggle the setting of the RD (recursion desired) bit
in the query. This bit is set by default, which means
<span class="command"><strong>mdig</strong></span> normally sends recursive
queries.
</p></dd>
<dt><span class="term"><code class="option">+retry=T</code></span></dt>
<dd><p>
Sets the number of times to retry UDP queries to
server to <em class="parameter"><code>T</code></em> instead of the
default, 2. Unlike <em class="parameter"><code>+tries</code></em>,
this does not include the initial query.
</p></dd>
<dt><span class="term"><code class="option">+[no]subnet=addr[/prefix-length]</code></span></dt>
<dd>
<p>
Send (don't send) an EDNS Client Subnet option with the
specified IP address or network prefix.
</p>
<p>
<span class="command"><strong>mdig +subnet=0.0.0.0/0</strong></span>, or simply
<span class="command"><strong>mdig +subnet=0</strong></span> 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
<span class="emphasis"><em>not</em></span> be used when resolving
this query.
</p>
</dd>
<dt><span class="term"><code class="option">+timeout=T</code></span></dt>
<dd><p>
Sets the timeout for a query to
<em class="parameter"><code>T</code></em> seconds. The default
timeout is 5 seconds for UDP transport and 10 for TCP.
An attempt to set <em class="parameter"><code>T</code></em> to less
than 1 will result
in a query timeout of 1 second being applied.
</p></dd>
<dt><span class="term"><code class="option">+tries=T</code></span></dt>
<dd><p>
Sets the number of times to try UDP queries to server
to <em class="parameter"><code>T</code></em> instead of the default,
3. If <em class="parameter"><code>T</code></em> is less than or equal
to zero, the number of tries is silently rounded up
to 1.
</p></dd>
<dt><span class="term"><code class="option">+udptimeout=T</code></span></dt>
<dd><p>
Sets the timeout between UDP query retries.
</p></dd>
<dt><span class="term"><code class="option">+[no]unknownformat</code></span></dt>
<dd><p>
Print all RDATA in unknown RR type presentation format
(RFC 3597). The default is to print RDATA for known types
in the type's presentation format.
</p></dd>
<dt><span class="term"><code class="option">+[no]zflag</code></span></dt>
<dd><p>
Set [do not set] the last unassigned DNS header flag in a
DNS query. This flag is off by default.
</p></dd>
</dl></div>
<p>
</p>
</div>
<div class="refsection">
<a name="id-1.14.3.11"></a><h2>SEE ALSO</h2>
<p><span class="citerefentry"><span class="refentrytitle">dig</span>(1)</span>,
<em class="citetitle">RFC1035</em>.
</p>
</div>
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