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+<!DOCTYPE book [
+<!ENTITY mdash "&#8212;">]>
+<!--
+ - Copyright (C) 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/.
+ -
+ - See the COPYRIGHT file distributed with this work for additional
+ - information regarding copyright ownership.
+-->
+
+<!-- Converted by db4-upgrade version 1.0 -->
+<refentry xmlns:db="http://docbook.org/ns/docbook" version="5.0" xml:id="man.mdig">
+ <info>
+ <date>2015-01-05</date>
+ </info>
+ <refentryinfo>
+ <corpname>ISC</corpname>
+ <corpauthor>Internet Systems Consortium, Inc.</corpauthor>
+ </refentryinfo>
+ <refmeta>
+ <refentrytitle><application>mdig</application></refentrytitle>
+ <manvolnum>1</manvolnum>
+ <refmiscinfo>BIND9</refmiscinfo>
+ </refmeta>
+ <refnamediv>
+ <refname><application>mdig</application></refname>
+ <refpurpose>DNS pipelined lookup utility</refpurpose>
+ </refnamediv>
+
+ <docinfo>
+ <copyright>
+ <year>2015</year>
+ <year>2016</year>
+ <year>2017</year>
+ <year>2018</year>
+ <year>2019</year>
+ <holder>Internet Systems Consortium, Inc. ("ISC")</holder>
+ </copyright>
+ </docinfo>
+
+ <refsynopsisdiv>
+ <cmdsynopsis sepchar=" ">
+ <command>mdig</command>
+ <arg choice="req" rep="norepeat">@server</arg>
+ <arg choice="opt" rep="norepeat"><option>-f <replaceable class="parameter">filename</replaceable></option></arg>
+ <arg choice="opt" rep="norepeat"><option>-h</option></arg>
+ <arg choice="opt" rep="norepeat"><option>-v</option></arg>
+ <group choice="opt" rep="norepeat">
+ <arg choice="opt" rep="norepeat"><option>-4</option></arg>
+ <arg choice="opt" rep="norepeat"><option>-6</option></arg>
+ </group>
+ <arg choice="opt" rep="norepeat"><option>-m</option></arg>
+ <arg choice="opt" rep="norepeat"><option>-b <replaceable class="parameter">address</replaceable></option></arg>
+ <arg choice="opt" rep="norepeat"><option>-p <replaceable class="parameter">port#</replaceable></option></arg>
+ <arg choice="opt" rep="norepeat"><option>-c <replaceable class="parameter">class</replaceable></option></arg>
+ <arg choice="opt" rep="norepeat"><option>-t <replaceable class="parameter">type</replaceable></option></arg>
+ <arg choice="opt" rep="norepeat"><option>-i</option></arg>
+ <arg choice="opt" rep="norepeat"><option>-x <replaceable class="parameter">addr</replaceable></option></arg>
+ <arg choice="opt" rep="repeat">plusopt</arg>
+ </cmdsynopsis>
+
+ <cmdsynopsis sepchar=" ">
+ <command>mdig</command>
+ <arg choice="req" rep="norepeat">-h</arg>
+ </cmdsynopsis>
+
+ <cmdsynopsis sepchar=" ">
+ <command>mdig</command>
+ <arg choice="opt" rep="norepeat">@server</arg>
+ <arg choice="req" rep="repeat">global-opt</arg>
+ <arg choice="req" rep="repeat">
+ <arg choice="req" rep="repeat">local-opt</arg>
+ <arg choice="req" rep="norepeat">query</arg>
+ </arg>
+ </cmdsynopsis>
+ </refsynopsisdiv>
+
+ <refsection><info><title>DESCRIPTION</title></info>
+
+ <para><command>mdig</command>
+ is a multiple/pipelined query version of <command>dig</command>:
+ 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.
+ </para>
+
+ <para>
+ <command>mdig</command> options are a subset of the
+ <command>dig</command> 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.
+ </para>
+
+ <para>
+ The <arg choice="req" rep="norepeat">@server</arg> option is a mandatory global
+ option. It is the name or IP address of the name server to query.
+ (Unlike <command>dig</command>, this value is not retrieved from
+ <filename>/etc/resolv.conf</filename>.) It can be an IPv4 address
+ in dotted-decimal notation, an IPv6 address in colon-delimited
+ notation, or a hostname. When the supplied
+ <parameter>server</parameter> argument is a hostname,
+ <command>mdig</command> resolves that name before querying
+ the name server.
+ </para>
+
+ <para><command>mdig</command>
+ 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.
+ </para>
+
+ <para>
+ Each query option is identified by a keyword preceded by a plus
+ sign (<literal>+</literal>). Some keywords set or reset an
+ option. These may be preceded by the string <literal>no</literal>
+ to negate the meaning of that keyword. Other keywords assign
+ values to options like the timeout interval. They have the
+ form <option>+keyword=value</option>.
+ </para>
+ </refsection>
+
+ <refsection><info><title>ANYWHERE OPTIONS</title></info>
+
+
+ <para>
+ The <option>-f</option> option makes <command>mdig</command>
+ operate in batch mode by reading a list of lookup requests to
+ process from the file <parameter>filename</parameter>. 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 <command>mdig</command> using the command-line interface.
+ </para>
+
+ <para>
+ The <option>-h</option> causes <command>mdig</command> to
+ print the detailed help with the full list of options and exit.
+ </para>
+
+ <para>
+ The <option>-v</option> causes <command>mdig</command> to
+ print the version number and exit.
+ </para>
+ </refsection>
+
+ <refsection><info><title>GLOBAL OPTIONS</title></info>
+
+
+ <para>
+ The <option>-4</option> option forces <command>mdig</command> to
+ only use IPv4 query transport.
+ </para>
+
+ <para>
+ The <option>-6</option> option forces <command>mdig</command> to
+ only use IPv6 query transport.
+ </para>
+
+ <para>
+ The <option>-b</option> option sets the source IP address of the
+ query to <parameter>address</parameter>. 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
+ "#&lt;port&gt;"
+ </para>
+
+ <para>
+ The <option>-m</option> option enables memory usage debugging.
+ </para>
+
+ <para>
+ The <option>-p</option> option is used when a non-standard port
+ number is to be queried.
+ <parameter>port#</parameter> is the port number
+ that <command>mdig</command> 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.
+ </para>
+
+ <para>
+ The global query options are:
+ <variablelist>
+
+ <varlistentry>
+ <term><option>+[no]additional</option></term>
+ <listitem>
+ <para>
+ Display [do not display] the additional section of a
+ reply. The default is to display it.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]all</option></term>
+ <listitem>
+ <para>
+ Set or clear all display flags.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]answer</option></term>
+ <listitem>
+ <para>
+ Display [do not display] the answer section of a
+ reply. The default is to display it.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]authority</option></term>
+ <listitem>
+ <para>
+ Display [do not display] the authority section of a
+ reply. The default is to display it.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]besteffort</option></term>
+ <listitem>
+ <para>
+ Attempt to display the contents of messages which are
+ malformed. The default is to not display malformed
+ answers.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]cl</option></term>
+ <listitem>
+ <para>
+ Display [do not display] the CLASS when printing the
+ record.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]comments</option></term>
+ <listitem>
+ <para>
+ Toggle the display of comment lines in the output.
+ The default is to print comments.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]continue</option></term>
+ <listitem>
+ <para>
+ Continue on errors (e.g. timeouts).
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]crypto</option></term>
+ <listitem>
+ <para>
+ 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 ]".
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+dscp[=value]</option></term> <listitem>
+ <para>
+ 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.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]multiline</option></term>
+ <listitem>
+ <para>
+ 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 <command>mdig</command>
+ output.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]question</option></term>
+ <listitem>
+ <para>
+ 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.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]rrcomments</option></term>
+ <listitem>
+ <para>
+ 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.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]short</option></term>
+ <listitem>
+ <para>
+ Provide a terse answer. The default is to print the
+ answer in a verbose form.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+split=W</option></term>
+ <listitem>
+ <para>
+ Split long hex- or base64-formatted fields in resource
+ records into chunks of <parameter>W</parameter>
+ characters (where <parameter>W</parameter> is rounded
+ up to the nearest multiple of 4).
+ <parameter>+nosplit</parameter> or
+ <parameter>+split=0</parameter> causes fields not to
+ be split at all. The default is 56 characters, or
+ 44 characters when multiline mode is active.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]tcp</option></term>
+ <listitem>
+ <para>
+ Use [do not use] TCP when querying name servers. The
+ default behavior is to use UDP.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]ttlid</option></term>
+ <listitem>
+ <para>
+ Display [do not display] the TTL when printing the
+ record.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]ttlunits</option></term>
+ <listitem>
+ <para>
+ 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.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]vc</option></term>
+ <listitem>
+ <para>
+ Use [do not use] TCP when querying name servers. This
+ alternate syntax to <parameter>+[no]tcp</parameter>
+ is provided for backwards compatibility. The "vc"
+ stands for "virtual circuit".
+ </para>
+ </listitem>
+ </varlistentry>
+
+ </variablelist>
+
+ </para>
+ </refsection>
+
+ <refsection><info><title>LOCAL OPTIONS</title></info>
+
+
+ <para>
+ The <option>-c</option> option sets the query class to
+ <parameter>class</parameter>. It can be any valid query class
+ which is supported in BIND 9. The default query class is "IN".
+ </para>
+
+ <para>
+ The <option>-t</option> option sets the query type to
+ <parameter>type</parameter>. It can be any valid query type
+ which is supported in BIND 9. The default query type is "A",
+ unless the <option>-x</option> option is supplied to indicate
+ a reverse lookup with the "PTR" query type.
+ </para>
+
+ <para>
+ The <option>-i</option> option sets the reverse domain for
+ IPv6 addresses to IP6.INT.
+ </para>
+
+ <para>
+ Reverse lookups &mdash; mapping addresses to names &mdash; are
+ simplified by the <option>-x</option> option.
+ <parameter>addr</parameter> is an IPv4
+ address in dotted-decimal notation, or a colon-delimited IPv6 address.
+ <command>mdig</command> automatically performs a lookup for a
+ query name like <literal>11.12.13.10.in-addr.arpa</literal> 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 <option>-i</option> option.
+ </para>
+
+ <para>
+ The local query options are:
+ <variablelist>
+
+ <varlistentry>
+ <term><option>+[no]aaflag</option></term>
+ <listitem>
+ <para>
+ A synonym for <parameter>+[no]aaonly</parameter>.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]aaonly</option></term>
+ <listitem>
+ <para>
+ Sets the "aa" flag in the query.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]adflag</option></term>
+ <listitem>
+ <para>
+ 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.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+bufsize=B</option></term>
+ <listitem>
+ <para>
+ Set the UDP message buffer size advertised using EDNS0
+ to <parameter>B</parameter> 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.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]cdflag</option></term>
+ <listitem>
+ <para>
+ Set [do not set] the CD (checking disabled) bit in
+ the query. This requests the server to not perform
+ DNSSEC validation of responses.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]cookie<optional>=####</optional></option></term>
+ <listitem>
+ <para>
+ 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 <option>+nocookie</option>.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]dnssec</option></term>
+ <listitem>
+ <para>
+ Requests DNSSEC records be sent by setting the DNSSEC
+ OK bit (DO) in the OPT record in the additional section
+ of the query.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]edns[=#]</option></term>
+ <listitem>
+ <para>
+ 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. <option>+noedns</option>
+ clears the remembered EDNS version. EDNS is set to
+ 0 by default.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]ednsflags[=#]</option></term>
+ <listitem>
+ <para>
+ 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.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]ednsopt[=code[:value]]</option></term>
+ <listitem>
+ <para>
+ Specify EDNS option with code point <option>code</option>
+ and optionally payload of <option>value</option> as a
+ hexadecimal string. <option>+noednsopt</option>
+ clears the EDNS options to be sent.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]expire</option></term>
+ <listitem>
+ <para>
+ Send an EDNS Expire option.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]nsid</option></term>
+ <listitem>
+ <para>
+ Include an EDNS name server ID request when sending
+ a query.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]recurse</option></term>
+ <listitem>
+ <para>
+ Toggle the setting of the RD (recursion desired) bit
+ in the query. This bit is set by default, which means
+ <command>mdig</command> normally sends recursive
+ queries.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+retry=T</option></term>
+ <listitem>
+ <para>
+ Sets the number of times to retry UDP queries to
+ server to <parameter>T</parameter> instead of the
+ default, 2. Unlike <parameter>+tries</parameter>,
+ this does not include the initial query.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]subnet=addr[/prefix-length]</option></term>
+ <listitem>
+ <para>
+ Send (don't send) an EDNS Client Subnet option with the
+ specified IP address or network prefix.
+ </para>
+ <para>
+ <command>mdig +subnet=0.0.0.0/0</command>, or simply
+ <command>mdig +subnet=0</command> 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
+ <emphasis>not</emphasis> be used when resolving
+ this query.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+timeout=T</option></term>
+ <listitem>
+ <para>
+ Sets the timeout for a query to
+ <parameter>T</parameter> seconds. The default
+ timeout is 5 seconds for UDP transport and 10 for TCP.
+ An attempt to set <parameter>T</parameter> to less
+ than 1 will result
+ in a query timeout of 1 second being applied.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+tries=T</option></term>
+ <listitem>
+ <para>
+ Sets the number of times to try UDP queries to server
+ to <parameter>T</parameter> instead of the default,
+ 3. If <parameter>T</parameter> is less than or equal
+ to zero, the number of tries is silently rounded up
+ to 1.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+udptimeout=T</option></term>
+ <listitem>
+ <para>
+ Sets the timeout between UDP query retries.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]unknownformat</option></term>
+ <listitem>
+ <para>
+ 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.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>+[no]zflag</option></term>
+ <listitem>
+ <para>
+ Set [do not set] the last unassigned DNS header flag in a
+ DNS query. This flag is off by default.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ </variablelist>
+
+ </para>
+ </refsection>
+
+ <refsection><info><title>SEE ALSO</title></info>
+
+ <para><citerefentry>
+ <refentrytitle>dig</refentrytitle><manvolnum>1</manvolnum>
+ </citerefentry>,
+ <citetitle>RFC1035</citetitle>.
+ </para>
+ </refsection>
+</refentry>