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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <!-- - Copyright (C) 2000-2021 Internet Systems Consortium, Inc. ("ISC") - - This Source Code Form is subject to the terms of the Mozilla Public - License, v. 2.0. If a copy of the MPL was not distributed with this - file, You can obtain one at http://mozilla.org/MPL/2.0/. --> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>mdig</title> <meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> <link rel="home" href="Bv9ARM.html" title="BIND 9 Administrator Reference Manual"> <link rel="up" href="Bv9ARM.ch13.html" title="Manual pages"> <link rel="prev" href="man.lwresd.html" title="lwresd"> <link rel="next" href="man.named-checkconf.html" title="named-checkconf"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr><th colspan="3" align="center"><span class="application">mdig</span></th></tr> <tr> <td width="20%" align="left"> <a accesskey="p" href="man.lwresd.html">Prev</a>�</td> <th width="60%" align="center">Manual pages</th> <td width="20%" align="right">�<a accesskey="n" href="man.named-checkconf.html">Next</a> </td> </tr> </table> <hr> </div> <div class="refentry"> <a name="man.mdig"></a><div class="titlepage"></div> <div class="refnamediv"> <h2>Name</h2> <p><span class="application">mdig</span> — DNS pipelined lookup utility</p> </div> <div class="refsynopsisdiv"> <h2>Synopsis</h2> <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">-m</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> <div class="cmdsynopsis"><p><code class="command">mdig</code> {-h}</p></div> <div class="cmdsynopsis"><p><code class="command">mdig</code> [@server] {global-opt...} { {local-opt...} {query} ...}</p></div> </div> <div class="refsection"> <a name="id-1.14.22.7"></a><h2>DESCRIPTION</h2> <p><span class="command"><strong>mdig</strong></span> is a multiple/pipelined query version of <span class="command"><strong>dig</strong></span>: instead of waiting for a response after sending each query, it begins by sending all queries. Responses are displayed in the order in which they are received, not in the order the corresponding queries were sent. </p> <p> <span class="command"><strong>mdig</strong></span> options are a subset of the <span class="command"><strong>dig</strong></span> options, and are divided into "anywhere options" which can occur anywhere, "global options" which must occur before the query name (or they are ignored with a warning), and "local options" which apply to the next query on the command line. </p> <p> The {@server} option is a mandatory global option. It is the name or IP address of the name server to query. (Unlike <span class="command"><strong>dig</strong></span>, this value is not retrieved from <code class="filename">/etc/resolv.conf</code>.) It can be an IPv4 address in dotted-decimal notation, an IPv6 address in colon-delimited notation, or a hostname. When the supplied <em class="parameter"><code>server</code></em> argument is a hostname, <span class="command"><strong>mdig</strong></span> resolves that name before querying the name server. </p> <p><span class="command"><strong>mdig</strong></span> provides a number of query options which affect the way in which lookups are made and the results displayed. Some of these set or reset flag bits in the query header, some determine which sections of the answer get printed, and others determine the timeout and retry strategies. </p> <p> Each query option is identified by a keyword preceded by a plus sign (<code class="literal">+</code>). Some keywords set or reset an option. These may be preceded by the string <code class="literal">no</code> to negate the meaning of that keyword. Other keywords assign values to options like the timeout interval. They have the form <code class="option">+keyword=value</code>. </p> </div> <div class="refsection"> <a name="id-1.14.22.8"></a><h2>ANYWHERE OPTIONS</h2> <p> The <code class="option">-f</code> option makes <span class="command"><strong>mdig</strong></span> operate in batch mode by reading a list of lookup requests to process from the file <em class="parameter"><code>filename</code></em>. The file contains a number of queries, one per line. Each entry in the file should be organized in the same way they would be presented as queries to <span class="command"><strong>mdig</strong></span> using the command-line interface. </p> <p> The <code class="option">-h</code> causes <span class="command"><strong>mdig</strong></span> to print the detailed help with the full list of options and exit. </p> <p> The <code class="option">-v</code> causes <span class="command"><strong>mdig</strong></span> to print the version number and exit. </p> </div> <div class="refsection"> <a name="id-1.14.22.9"></a><h2>GLOBAL OPTIONS</h2> <p> The <code class="option">-4</code> option forces <span class="command"><strong>mdig</strong></span> to only use IPv4 query transport. </p> <p> The <code class="option">-6</code> option forces <span class="command"><strong>mdig</strong></span> to only use IPv6 query transport. </p> <p> The <code class="option">-b</code> option sets the source IP address of the query to <em class="parameter"><code>address</code></em>. This must be a valid address on one of the host's network interfaces or "0.0.0.0" or "::". An optional port may be specified by appending "#<port>" </p> <p> The <code class="option">-m</code> option enables memory usage debugging. </p> <p> The <code class="option">-p</code> option is used when a non-standard port number is to be queried. <em class="parameter"><code>port#</code></em> is the port number that <span class="command"><strong>mdig</strong></span> will send its queries instead of the standard DNS port number 53. This option would be used to test a name server that has been configured to listen for queries on a non-standard port number. </p> <p> The global query options are: </p> <div class="variablelist"><dl class="variablelist"> <dt><span class="term"><code class="option">+[no]additional</code></span></dt> <dd><p> Display [do not display] the additional section of a reply. The default is to display it. </p></dd> <dt><span class="term"><code class="option">+[no]all</code></span></dt> <dd><p> Set or clear all display flags. </p></dd> <dt><span class="term"><code class="option">+[no]answer</code></span></dt> <dd><p> Display [do not display] the answer section of a reply. The default is to display it. </p></dd> <dt><span class="term"><code class="option">+[no]authority</code></span></dt> <dd><p> Display [do not display] the authority section of a reply. The default is to display it. </p></dd> <dt><span class="term"><code class="option">+[no]besteffort</code></span></dt> <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">+burst</code></span></dt> <dd><p> This option delays queries until the start of the next second. </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]continue</code></span></dt> <dd><p> Continue on errors (e.g. timeouts). </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-1.14.22.10"></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 — mapping addresses to names — 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-1.14.22.11"></a><h2>SEE ALSO</h2> <p><span class="citerefentry"><span class="refentrytitle">dig</span>(1)</span>, <em class="citetitle">RFC1035</em>. </p> </div> </div> <div class="navfooter"> <hr> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"> <a accesskey="p" href="man.lwresd.html">Prev</a>�</td> <td width="20%" align="center"><a accesskey="u" href="Bv9ARM.ch13.html">Up</a></td> <td width="40%" align="right">�<a accesskey="n" href="man.named-checkconf.html">Next</a> </td> </tr> <tr> <td width="40%" align="left" valign="top"> <span class="application">lwresd</span>�</td> <td width="20%" align="center"><a accesskey="h" href="Bv9ARM.html">Home</a></td> <td width="40%" align="right" valign="top">�<span class="application">named-checkconf</span> </td> </tr> </table> </div> <p xmlns:db="http://docbook.org/ns/docbook" style="text-align: center;">BIND 9.11.36 (Extended Support Version)</p> </body> </html>
