ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt [<!ENTITY mdash "&#8212;">]>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt<refentry id="man.dig">

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <refentryinfo>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <date>Jun 30, 2000</date>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </refentryinfo>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <refmeta>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <refentrytitle>dig</refentrytitle>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <manvolnum>1</manvolnum>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <refmiscinfo>BIND9</refmiscinfo>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </refmeta>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <refnamediv>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <refname>dig</refname>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <refpurpose>DNS lookup utility</refpurpose>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </refnamediv>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <docinfo>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <copyright>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <year>2004</year>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <year>2005</year>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <year>2006</year>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <year>2007</year>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <year>2008</year>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <holder>Internet Systems Consortium, Inc. ("ISC")</holder>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </copyright>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <copyright>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <year>2000</year>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <year>2001</year>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <year>2002</year>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <year>2003</year>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <holder>Internet Software Consortium.</holder>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </copyright>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </docinfo>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <refsynopsisdiv>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <cmdsynopsis>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <command>dig</command>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <arg choice="opt">@server</arg>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <arg><option>-b <replaceable class="parameter">address</replaceable></option></arg>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <arg><option>-c <replaceable class="parameter">class</replaceable></option></arg>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <arg><option>-f <replaceable class="parameter">filename</replaceable></option></arg>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <arg><option>-k <replaceable class="parameter">filename</replaceable></option></arg>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <arg><option>-m</option></arg>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <arg><option>-p <replaceable class="parameter">port#</replaceable></option></arg>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <arg><option>-q <replaceable class="parameter">name</replaceable></option></arg>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <arg><option>-t <replaceable class="parameter">type</replaceable></option></arg>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <arg><option>-x <replaceable class="parameter">addr</replaceable></option></arg>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <arg><option>-y <replaceable class="parameter"><optional>hmac:</optional>name:key</replaceable></option></arg>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <arg><option>-4</option></arg>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <arg><option>-6</option></arg>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <arg choice="opt">name</arg>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <arg choice="opt">type</arg>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <arg choice="opt">class</arg>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <arg choice="opt" rep="repeat">queryopt</arg>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </cmdsynopsis>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <cmdsynopsis>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <command>dig</command>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <arg><option>-h</option></arg>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </cmdsynopsis>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <cmdsynopsis>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <command>dig</command>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <arg choice="opt" rep="repeat">global-queryopt</arg>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <arg choice="opt" rep="repeat">query</arg>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </cmdsynopsis>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </refsynopsisdiv>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <refsect1>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <title>DESCRIPTION</title>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <para><command>dig</command>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt (domain information groper) is a flexible tool

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt for interrogating DNS name servers. It performs DNS lookups and

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt displays the answers that are returned from the name server(s) that

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt were queried. Most DNS administrators use <command>dig</command> to

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt troubleshoot DNS problems because of its flexibility, ease of use and

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt clarity of output. Other lookup tools tend to have less functionality

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt than <command>dig</command>.

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt Although <command>dig</command> is normally used with

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt command-line

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt arguments, it also has a batch mode of operation for reading lookup

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt requests from a file. A brief summary of its command-line arguments

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt and options is printed when the <option>-h</option> option is given.

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt Unlike earlier versions, the BIND 9 implementation of

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <command>dig</command> allows multiple lookups to be issued

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt from the

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt command line.

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt Unless it is told to query a specific name server,

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <command>dig</command> will try each of the servers listed

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt in

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <filename>/etc/resolv.conf</filename>.

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt When no command line arguments or options are given,

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <command>dig</command> will perform an NS query for "." (the root).

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt It is possible to set per-user defaults for <command>dig</command> via

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <filename>${HOME}/.digrc</filename>. This file is read and

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt any options in it

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt are applied before the command line arguments.

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt The IN and CH class names overlap with the IN and CH top level

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt domains names. Either use the <option>-t</option> and

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <option>-c</option> options to specify the type and class,

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt use the <option>-q</option> the specify the domain name, or

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt use "IN." and "CH." when looking up these top level domains.

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </refsect1>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <refsect1>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <title>SIMPLE USAGE</title>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt A typical invocation of <command>dig</command> looks like:

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <programlisting> dig @server name type </programlisting>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt where:

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <variablelist>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <varlistentry>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <term><constant>server</constant></term>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <listitem>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt is the name or IP address of the name server to query. This can

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt be an IPv4

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt address in dotted-decimal notation or an IPv6

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt address in colon-delimited notation. When the supplied

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <parameter>server</parameter> argument is a

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt hostname,

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <command>dig</command> resolves that name before

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt querying that name

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt server. If no <parameter>server</parameter>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt argument is provided,

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <command>dig</command> consults <filename>/etc/resolv.conf</filename>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt and queries the name servers listed there. The reply from the

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt name

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt server that responds is displayed.

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </listitem>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </varlistentry>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <varlistentry>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <term><constant>name</constant></term>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <listitem>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt is the name of the resource record that is to be looked up.

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </listitem>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </varlistentry>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <varlistentry>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <term><constant>type</constant></term>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <listitem>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt indicates what type of query is required &mdash;

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt ANY, A, MX, SIG, etc.

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <parameter>type</parameter> can be any valid query

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt type. If no

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <parameter>type</parameter> argument is supplied,

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <command>dig</command> will perform a lookup for an

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt A record.

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </listitem>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </varlistentry>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </variablelist>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </refsect1>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <refsect1>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <title>OPTIONS</title>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt The <option>-b</option> option sets the source IP address of the query

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt to <parameter>address</parameter>. This must be a valid

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt address on

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt one of the host's network interfaces or "0.0.0.0" or "::". An optional

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt port

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt may be specified by appending "#&lt;port&gt;"

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt The default query class (IN for internet) is overridden by the

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <option>-c</option> option. <parameter>class</parameter> is

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt any valid

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt class, such as HS for Hesiod records or CH for Chaosnet records.

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt The <option>-f</option> option makes <command>dig </command>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt operate

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt in batch mode by reading a list of lookup requests to process from the

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt file <parameter>filename</parameter>. The file contains a

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt number of

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt queries, one per line. Each entry in the file should be organized in

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt the same way they would be presented as queries to

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <command>dig</command> using the command-line interface.

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt The <option>-m</option> option enables memory usage debugging.

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <!-- It enables ISC_MEM_DEBUGTRACE and ISC_MEM_DEBUGRECORD

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt If a non-standard port number is to be queried, the

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <option>-p</option> option is used. <parameter>port#</parameter> is

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt the port number that <command>dig</command> will send its

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt queries

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt instead of the standard DNS port number 53. This option would be used

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt to test a name server that has been configured to listen for queries

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt on a non-standard port number.

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt The <option>-4</option> option forces <command>dig</command>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt to only

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt use IPv4 query transport. The <option>-6</option> option forces

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <command>dig</command> to only use IPv6 query transport.

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt The <option>-t</option> option sets the query type to

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <parameter>type</parameter>. It can be any valid query type

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt which is

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt supported in BIND 9. The default query type is "A", unless the

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <option>-x</option> option is supplied to indicate a reverse lookup.

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt A zone transfer can be requested by specifying a type of AXFR. When

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt an incremental zone transfer (IXFR) is required,

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <parameter>type</parameter> is set to <literal>ixfr=N</literal>.

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt The incremental zone transfer will contain the changes made to the zone

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt since the serial number in the zone's SOA record was

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <parameter>N</parameter>.

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt The <option>-q</option> option sets the query name to

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <parameter>name</parameter>. This useful do distinguish the

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <parameter>name</parameter> from other arguments.

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt Reverse lookups &mdash; mapping addresses to names &mdash; are simplified by the

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <option>-x</option> option. <parameter>addr</parameter> is

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt an IPv4

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt address in dotted-decimal notation, or a colon-delimited IPv6 address.

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt When this option is used, there is no need to provide the

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <parameter>name</parameter>, <parameter>class</parameter> and

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <parameter>type</parameter> arguments. <command>dig</command>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt automatically performs a lookup for a name like

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <literal>11.12.13.10.in-addr.arpa</literal> and sets the

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt query type and

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt class to PTR and IN respectively. By default, IPv6 addresses are

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt looked up using nibble format under the IP6.ARPA domain.

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt To use the older RFC1886 method using the IP6.INT domain

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt specify the <option>-i</option> option. Bit string labels (RFC2874)

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt are now experimental and are not attempted.

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt To sign the DNS queries sent by <command>dig</command> and

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt their

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt responses using transaction signatures (TSIG), specify a TSIG key file

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt using the <option>-k</option> option. You can also specify the TSIG

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt key itself on the command line using the <option>-y</option> option;

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <parameter>hmac</parameter> is the type of the TSIG, default HMAC-MD5,

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <parameter>name</parameter> is the name of the TSIG key and

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <parameter>key</parameter> is the actual key. The key is a

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt base-64

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt encoded string, typically generated by

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <citerefentry>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <refentrytitle>dnssec-keygen</refentrytitle><manvolnum>8</manvolnum>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </citerefentry>.

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt Caution should be taken when using the <option>-y</option> option on

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt multi-user systems as the key can be visible in the output from

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <citerefentry>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <refentrytitle>ps</refentrytitle><manvolnum>1</manvolnum>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </citerefentry>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt or in the shell's history file. When

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt using TSIG authentication with <command>dig</command>, the name

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt server that is queried needs to know the key and algorithm that is

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt being used. In BIND, this is done by providing appropriate

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <command>key</command> and <command>server</command> statements in

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <filename>named.conf</filename>.

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </refsect1>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <refsect1>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <title>QUERY OPTIONS</title>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <para><command>dig</command>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt provides a number of query options which affect

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt the way in which lookups are made and the results displayed. Some of

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt these set or reset flag bits in the query header, some determine which

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt sections of the answer get printed, and others determine the timeout

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt and retry strategies.

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt Each query option is identified by a keyword preceded by a plus sign

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt (<literal>+</literal>). Some keywords set or reset an

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt option. These may be preceded

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt by the string <literal>no</literal> to negate the meaning of

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt that keyword. Other

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt keywords assign values to options like the timeout interval. They

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt have the form <option>+keyword=value</option>.

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt The query options are:

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <variablelist>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <varlistentry>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <term><option>+[no]tcp</option></term>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <listitem>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt Use [do not use] TCP when querying name servers. The default

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt behavior is to use UDP unless an AXFR or IXFR query is

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt requested, in

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt which case a TCP connection is used.

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </listitem>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </varlistentry>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <varlistentry>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <term><option>+[no]vc</option></term>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <listitem>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt Use [do not use] TCP when querying name servers. This alternate

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt syntax to <parameter>+[no]tcp</parameter> is

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt provided for backwards

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt compatibility. The "vc" stands for "virtual circuit".

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </para>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </listitem>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt </varlistentry>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <varlistentry>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <term><option>+[no]ignore</option></term>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <listitem>

ef421f66f47224a42073deaf087378c5d0c9952eEvan Hunt <para>

Ignore truncation in UDP responses instead of retrying with TCP.

By

default, TCP retries are performed.

</para>

</listitem>

</varlistentry>

<varlistentry>

<term><option>+domain=somename</option></term>

<listitem>

<para>

Set the search list to contain the single domain

<parameter>somename</parameter>, as if specified in

a

<command>domain</command> directive in

<filename>/etc/resolv.conf</filename>, and enable

search list

processing as if the <parameter>+search</parameter>

option were given.

</para>

</listitem>

</varlistentry>

<varlistentry>

<term><option>+[no]search</option></term>

<listitem>

<para>

Use [do not use] the search list defined by the searchlist or

domain

directive in <filename>resolv.conf</filename> (if

any).

The search list is not used by default.

</para>

</listitem>

</varlistentry>

<varlistentry>

<term><option>+[no]showsearch</option></term>

<listitem>

<para>

Perform [do not perform] a search showing intermediate

results.

</para>

</listitem>

</varlistentry>

<varlistentry>

<term><option>+[no]defname</option></term>

<listitem>

<para>

Deprecated, treated as a synonym for <parameter>+[no]search</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]aaflag</option></term>

<listitem>

<para>

A synonym for <parameter>+[no]aaonly</parameter>.

</para>

</listitem>

</varlistentry>

<varlistentry>

<term><option>+[no]adflag</option></term>

<listitem>

<para>

Set [do not set] the AD (authentic data) bit in the query. The

AD bit

currently has a standard meaning only in responses, not in

queries,

but the ability to set the bit in the query is provided for

completeness.

</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]cl</option></term>

<listitem>

<para>

Display [do not display] the CLASS when printing the record.

</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]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>dig</command>

normally sends recursive queries. Recursion is automatically

disabled

when the <parameter>+nssearch</parameter> or

<parameter>+trace</parameter> query options are

used.

</para>

</listitem>

</varlistentry>

<varlistentry>

<term><option>+[no]nssearch</option></term>

<listitem>

<para>

When this option is set, <command>dig</command>

attempts to find the

authoritative name servers for the zone containing the name

being

looked up and display the SOA record that each name server has

for the

zone.

</para>

</listitem>

</varlistentry>

<varlistentry>

<term><option>+[no]trace</option></term>

<listitem>

<para>

Toggle tracing of the delegation path from the root name servers

for

the name being looked up. Tracing is disabled by default. When

tracing is enabled, <command>dig</command> makes

iterative queries to

resolve the name being looked up. It will follow referrals from

the

root servers, showing the answer from each server that was used

to

resolve the lookup.

</para>

</listitem>

</varlistentry>

<varlistentry>

<term><option>+[no]cmd</option></term>

<listitem>

<para>

Toggles the printing of the initial comment in the output

identifying

the version of <command>dig</command> and the query

options that have

been applied. This comment is printed by default.

</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>+[no]identify</option></term>

<listitem>

<para>

Show [or do not show] the IP address and port number that

supplied the

answer when the <parameter>+short</parameter> option

is enabled. If

short form answers are requested, the default is not to show the

source address and port number of the server that provided the

answer.

</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]stats</option></term>

<listitem>

<para>

This query option toggles the printing of statistics: when the

query

was made, the size of the reply and so on. The default

behavior is

to print the query statistics.

</para>

</listitem>

</varlistentry>

<varlistentry>

<term><option>+[no]qr</option></term>

<listitem>

<para>

Print [do not print] the query as it is sent.

By default, the query is not printed.

</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]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]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>+time=T</option></term>

<listitem>

<para>

Sets the timeout for a query to

<parameter>T</parameter> seconds. The default

timeout is 5 seconds.

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>+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>+ndots=D</option></term>

<listitem>

<para>

Set the number of dots that have to appear in

<parameter>name</parameter> to <parameter>D</parameter> for it to be

considered absolute. The default value is that defined using

the

ndots statement in <filename>/etc/resolv.conf</filename>, or 1 if no

ndots statement is present. Names with fewer dots are

interpreted as

relative names and will be searched for in the domains listed in

the

<option>search</option> or <option>domain</option> directive in

<filename>/etc/resolv.conf</filename>.

</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>+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.

</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>dig</command> output.

</para>

</listitem>

</varlistentry>

<varlistentry>

<term><option>+[no]fail</option></term>

<listitem>

<para>

Do not try the next server if you receive a SERVFAIL. The

default is

to not try the next server which is the reverse of normal stub

resolver

behavior.

</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]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]sigchase</option></term>

<listitem>

<para>

Chase DNSSEC signature chains. Requires dig be compiled with

-DDIG_SIGCHASE.

</para>

</listitem>

</varlistentry>

<varlistentry>

<term><option>+trusted-key=####</option></term>

<listitem>

<para>

Specifies a file containing trusted keys to be used with

<option>+sigchase</option>. Each DNSKEY record must be

on its own line.

</para>

<para>

If not specified, <command>dig</command> will look for

<filename>/etc/trusted-key.key</filename> then

<filename>trusted-key.key</filename> in the current directory.

</para>

<para>

Requires dig be compiled with -DDIG_SIGCHASE.

</para>

</listitem>

</varlistentry>

<varlistentry>

<term><option>+[no]topdown</option></term>

<listitem>

<para>

When chasing DNSSEC signature chains perform a top-down

validation.

Requires dig be compiled with -DDIG_SIGCHASE.

</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>

</variablelist>

</para>

</refsect1>

<refsect1>

<title>MULTIPLE QUERIES</title>

<para>

The BIND 9 implementation of <command>dig </command>

supports

specifying multiple queries on the command line (in addition to

supporting the <option>-f</option> batch file option). Each of those

queries can be supplied with its own set of flags, options and query

options.

</para>

<para>

In this case, each <parameter>query</parameter> argument

represent an

individual query in the command-line syntax described above. Each

consists of any of the standard options and flags, the name to be

looked up, an optional query type and class and any query options that

should be applied to that query.

</para>

<para>

A global set of query options, which should be applied to all queries,

can also be supplied. These global query options must precede the

first tuple of name, class, type, options, flags, and query options

supplied on the command line. Any global query options (except

the <option>+[no]cmd</option> option) can be

overridden by a query-specific set of query options. For example:

<programlisting>

dig +qr www.isc.org any -x 127.0.0.1 isc.org ns +noqr

</programlisting>

shows how <command>dig</command> could be used from the

command line

to make three lookups: an ANY query for <literal>www.isc.org</literal>, a

reverse lookup of 127.0.0.1 and a query for the NS records of

<literal>isc.org</literal>.

A global query option of <parameter>+qr</parameter> is

applied, so

that <command>dig</command> shows the initial query it made

for each

lookup. The final query has a local query option of

<parameter>+noqr</parameter> which means that <command>dig</command>

will not print the initial query when it looks up the NS records for

<literal>isc.org</literal>.

</para>

</refsect1>

<refsect1>

<title>IDN SUPPORT</title>

<para>

If <command>dig</command> has been built with IDN (internationalized

domain name) support, it can accept and display non-ASCII domain names.

<command>dig</command> appropriately converts character encoding of

domain name before sending a request to DNS server or displaying a

reply from the server.

If you'd like to turn off the IDN support for some reason, defines

the <envar>IDN_DISABLE</envar> environment variable.

The IDN support is disabled if the variable is set when

<command>dig</command> runs.

</para>

</refsect1>

<refsect1>

<title>FILES</title>

<para><filename>/etc/resolv.conf</filename>

</para>

<para><filename>${HOME}/.digrc</filename>

</para>

</refsect1>

<refsect1>

<title>SEE ALSO</title>

<para><citerefentry>

<refentrytitle>host</refentrytitle><manvolnum>1</manvolnum>

</citerefentry>,

<citerefentry>

<refentrytitle>named</refentrytitle><manvolnum>8</manvolnum>

</citerefentry>,

<citerefentry>

<refentrytitle>dnssec-keygen</refentrytitle><manvolnum>8</manvolnum>

</citerefentry>,

<citetitle>RFC1035</citetitle>.

</para>

</refsect1>

<refsect1>

<title>BUGS</title>

<para>

There are probably too many query options.

</para>

</refsect1>

</refentry><!--