d6fa26d0adaec6c910115be34fe7a5a5f402c14fMark Andrews<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"

46bb3884a0738664862e3a36b7848aa374aebd45Tinderbox User [<!ENTITY mdash "&#8212;">]>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User<refentry id="man.dig">

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <refentryinfo>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <date>Jun 30, 2000</date>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </refentryinfo>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <refmeta>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <refentrytitle>dig</refentrytitle>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <manvolnum>1</manvolnum>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <refmiscinfo>BIND9</refmiscinfo>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </refmeta>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <refnamediv>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <refname>dig</refname>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <refpurpose>DNS lookup utility</refpurpose>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </refnamediv>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <docinfo>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <copyright>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <year>2004</year>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <year>2005</year>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <year>2006</year>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <year>2007</year>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <holder>Internet Systems Consortium, Inc. ("ISC")</holder>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </copyright>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <copyright>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <year>2000</year>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <year>2001</year>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <year>2002</year>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <year>2003</year>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <holder>Internet Software Consortium.</holder>

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User </copyright>

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User </docinfo>

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User <refsynopsisdiv>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <cmdsynopsis>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <command>dig</command>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <arg choice="opt">@server</arg>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <arg><option>-b <replaceable class="parameter">address</replaceable></option></arg>

7e71f05d8643aca84914437c900cb716444507e4Tinderbox User <arg><option>-c <replaceable class="parameter">class</replaceable></option></arg>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <arg><option>-f <replaceable class="parameter">filename</replaceable></option></arg>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <arg><option>-k <replaceable class="parameter">filename</replaceable></option></arg>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <arg><option>-p <replaceable class="parameter">port#</replaceable></option></arg>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <arg><option>-q <replaceable class="parameter">name</replaceable></option></arg>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <arg><option>-t <replaceable class="parameter">type</replaceable></option></arg>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <arg><option>-x <replaceable class="parameter">addr</replaceable></option></arg>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <arg><option>-y <replaceable class="parameter"><optional>hmac:</optional>name:key</replaceable></option></arg>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <arg><option>-4</option></arg>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <arg><option>-6</option></arg>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <arg choice="opt">name</arg>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <arg choice="opt">type</arg>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <arg choice="opt">class</arg>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <arg choice="opt" rep="repeat">queryopt</arg>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User </cmdsynopsis>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <cmdsynopsis>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <command>dig</command>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <arg><option>-h</option></arg>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User </cmdsynopsis>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <cmdsynopsis>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <command>dig</command>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <arg choice="opt" rep="repeat">global-queryopt</arg>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <arg choice="opt" rep="repeat">query</arg>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User </cmdsynopsis>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User </refsynopsisdiv>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <refsect1>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <title>DESCRIPTION</title>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <para><command>dig</command>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User (domain information groper) is a flexible tool

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User for interrogating DNS name servers. It performs DNS lookups and

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User displays the answers that are returned from the name server(s) that

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User were queried. Most DNS administrators use <command>dig</command> to

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User troubleshoot DNS problems because of its flexibility, ease of use and

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User clarity of output. Other lookup tools tend to have less functionality

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User than <command>dig</command>.

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </para>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <para>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User Although <command>dig</command> is normally used with

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User command-line

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User arguments, it also has a batch mode of operation for reading lookup

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User requests from a file. A brief summary of its command-line arguments

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User and options is printed when the <option>-h</option> option is given.

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User Unlike earlier versions, the BIND 9 implementation of

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <command>dig</command> allows multiple lookups to be issued

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User from the

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User command line.

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User </para>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <para>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User Unless it is told to query a specific name server,

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <command>dig</command> will try each of the servers listed

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User in

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <filename>/etc/resolv.conf</filename>.

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User </para>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <para>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User When no command line arguments or options are given, will perform an

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User NS query for "." (the root).

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User </para>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <para>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User It is possible to set per-user defaults for <command>dig</command> via

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User <filename>${HOME}/.digrc</filename>. This file is read and

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User any options in it

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User are applied before the command line arguments.

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User </para>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <para>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User The IN and CH class names overlap with the IN and CH top level

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User domains names. Either use the <option>-t</option> and

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User <option>-c</option> options to specify the type and class or

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User use the <option>-q</option> the specify the domain name or

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User use "IN." and "CH." when looking up these top level domains.

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User </para>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User </refsect1>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <refsect1>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <title>SIMPLE USAGE</title>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <para>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User A typical invocation of <command>dig</command> looks like:

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <programlisting> dig @server name type </programlisting>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User where:

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <variablelist>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <varlistentry>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <term><constant>server</constant></term>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <listitem>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <para>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User is the name or IP address of the name server to query. This can

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User be an IPv4

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User address in dotted-decimal notation or an IPv6

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User address in colon-delimited notation. When the supplied

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <parameter>server</parameter> argument is a

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User hostname,

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <command>dig</command> resolves that name before

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User querying that name

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User server. If no <parameter>server</parameter>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User argument is provided,

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <command>dig</command> consults <filename>/etc/resolv.conf</filename>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User and queries the name servers listed there. The reply from the

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User name

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User server that responds is displayed.

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User </para>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User </listitem>

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User </varlistentry>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <varlistentry>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <term><constant>name</constant></term>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <listitem>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <para>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User is the name of the resource record that is to be looked up.

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User </para>

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User </listitem>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </varlistentry>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User <varlistentry>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <term><constant>type</constant></term>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <listitem>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <para>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User indicates what type of query is required &mdash;

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User ANY, A, MX, SIG, etc.

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <parameter>type</parameter> can be any valid query

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User type. If no

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <parameter>type</parameter> argument is supplied,

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <command>dig</command> will perform a lookup for an

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User A record.

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </para>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </listitem>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </varlistentry>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </variablelist>

7e71f05d8643aca84914437c900cb716444507e4Tinderbox User </para>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User </refsect1>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <refsect1>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <title>OPTIONS</title>

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User <para>

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User The <option>-b</option> option sets the source IP address of the query

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User to <parameter>address</parameter>. This must be a valid

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User address on

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User one of the host's network interfaces or "0.0.0.0" or "::". An optional

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User port

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User may be specified by appending "#&lt;port&gt;"

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </para>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <para>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User The default query class (IN for internet) is overridden by the

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User <option>-c</option> option. <parameter>class</parameter> is

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User any valid

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User class, such as HS for Hesiod records or CH for Chaosnet records.

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User </para>

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User <para>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User The <option>-f</option> option makes <command>dig </command>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User operate

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User in batch mode by reading a list of lookup requests to process from the

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User file <parameter>filename</parameter>. The file contains a

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User number of

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User queries, one per line. Each entry in the file should be organized in

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User the same way they would be presented as queries to

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User <command>dig</command> using the command-line interface.

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User </para>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <para>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User If a non-standard port number is to be queried, the

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <option>-p</option> option is used. <parameter>port#</parameter> is

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User the port number that <command>dig</command> will send its

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User queries

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User instead of the standard DNS port number 53. This option would be used

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User to test a name server that has been configured to listen for queries

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User on a non-standard port number.

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </para>

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <para>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User The <option>-4</option> option forces <command>dig</command>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User to only

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User use IPv4 query transport. The <option>-6</option> option forces

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <command>dig</command> to only use IPv6 query transport.

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </para>

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <para>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User The <option>-t</option> option sets the query type to

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User <parameter>type</parameter>. It can be any valid query type

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User which is

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User supported in BIND 9. The default query type is "A", unless the

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <option>-x</option> option is supplied to indicate a reverse lookup.

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User A zone transfer can be requested by specifying a type of AXFR. When

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User an incremental zone transfer (IXFR) is required,

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <parameter>type</parameter> is set to <literal>ixfr=N</literal>.

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User The incremental zone transfer will contain the changes made to the zone

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User since the serial number in the zone's SOA record was

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User <parameter>N</parameter>.

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User </para>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <para>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User The <option>-q</option> option sets the query name to

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <parameter>name</parameter>. This useful do distinguish the

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User <parameter>name</parameter> from other arguments.

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User </para>

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User <para>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User Reverse lookups &mdash; mapping addresses to names &mdash; are simplified by the

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <option>-x</option> option. <parameter>addr</parameter> is

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User an IPv4

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User address in dotted-decimal notation, or a colon-delimited IPv6 address.

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User When this option is used, there is no need to provide the

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <parameter>name</parameter>, <parameter>class</parameter> and

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <parameter>type</parameter> arguments. <command>dig</command>

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User automatically performs a lookup for a name like

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <literal>11.12.13.10.in-addr.arpa</literal> and sets the

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User query type and

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User class to PTR and IN respectively. By default, IPv6 addresses are

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User looked up using nibble format under the IP6.ARPA domain.

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User To use the older RFC1886 method using the IP6.INT domain

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User specify the <option>-i</option> option. Bit string labels (RFC2874)

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User are now experimental and are not attempted.

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User </para>

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User <para>

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User To sign the DNS queries sent by <command>dig</command> and

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User their

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User responses using transaction signatures (TSIG), specify a TSIG key file

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User using the <option>-k</option> option. You can also specify the TSIG

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User key itself on the command line using the <option>-y</option> option;

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <parameter>hmac</parameter> is the type of the TSIG, default HMAC-MD5,

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User <parameter>name</parameter> is the name of the TSIG key and

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <parameter>key</parameter> is the actual key. The key is a

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User base-64

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User encoded string, typically generated by

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User <citerefentry>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <refentrytitle>dnssec-keygen</refentrytitle><manvolnum>8</manvolnum>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </citerefentry>.

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User Caution should be taken when using the <option>-y</option> option on

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User multi-user systems as the key can be visible in the output from

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <citerefentry>

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User <refentrytitle>ps</refentrytitle><manvolnum>1</manvolnum>

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User </citerefentry>

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User or in the shell's history file. When

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User using TSIG authentication with <command>dig</command>, the name

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User server that is queried needs to know the key and algorithm that is

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User being used. In BIND, this is done by providing appropriate

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <command>key</command> and <command>server</command> statements in

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <filename>named.conf</filename>.

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User </para>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </refsect1>

05da080bbd0c35705081c034cbb1985c274c2656Tinderbox User

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <refsect1>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <title>QUERY OPTIONS</title>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <para><command>dig</command>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User provides a number of query options which affect

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User the way in which lookups are made and the results displayed. Some of

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User these set or reset flag bits in the query header, some determine which

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User sections of the answer get printed, and others determine the timeout

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User and retry strategies.

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </para>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <para>

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User Each query option is identified by a keyword preceded by a plus sign

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User (<literal>+</literal>). Some keywords set or reset an

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User option. These may be preceded

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User by the string <literal>no</literal> to negate the meaning of

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User that keyword. Other

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User keywords assign values to options like the timeout interval. They

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User have the form <option>+keyword=value</option>.

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User The query options are:

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User

bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User <variablelist>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <varlistentry>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User <term><option>+[no]tcp</option></term>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <listitem>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <para>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User Use [do not use] TCP when querying name servers. The default

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User behavior is to use UDP unless an AXFR or IXFR query is

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User requested, in

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User which case a TCP connection is used.

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </para>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </listitem>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </varlistentry>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <varlistentry>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <term><option>+[no]vc</option></term>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <listitem>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User <para>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User Use [do not use] TCP when querying name servers. This alternate

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User syntax to <parameter>+[no]tcp</parameter> is

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User provided for backwards

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User compatibility. The "vc" stands for "virtual circuit".

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </para>

7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User </listitem>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User </varlistentry>

17e9d6023e9fec06511e93303836ec0f106379d2Tinderbox User

<varlistentry>

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

<listitem>

<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><!--