2 - Copyright (C) 2004-2011, 2013, 2014 Internet Systems Consortium, Inc. ("ISC")
3 - Copyright (C) 2000-2003 Internet Software Consortium.
5 - Permission to use, copy, modify, and/or distribute this software for any
6 - purpose with or without fee is hereby granted, provided that the above
7 - copyright notice and this permission notice appear in all copies.
9 - THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10 - REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11 - AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12 - INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13 - LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14 - OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15 - PERFORMANCE OF THIS SOFTWARE.
20 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
22 <meta name="generator" content="DocBook XSL Stylesheets V1.71.1">
24 <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="refentry" lang="en">
25 <a name="man.dig"></a><div class="titlepage"></div>
26 <div class="refnamediv">
28 <p>dig — DNS lookup utility</p>
30 <div class="refsynopsisdiv">
32 <div class="cmdsynopsis"><p><code class="command">dig</code> [@server] [<code class="option">-b <em class="replaceable"><code>address</code></em></code>] [<code class="option">-c <em class="replaceable"><code>class</code></em></code>] [<code class="option">-f <em class="replaceable"><code>filename</code></em></code>] [<code class="option">-k <em class="replaceable"><code>filename</code></em></code>] [<code class="option">-m</code>] [<code class="option">-p <em class="replaceable"><code>port#</code></em></code>] [<code class="option">-q <em class="replaceable"><code>name</code></em></code>] [<code class="option">-t <em class="replaceable"><code>type</code></em></code>] [<code class="option">-v</code>] [<code class="option">-x <em class="replaceable"><code>addr</code></em></code>] [<code class="option">-y <em class="replaceable"><code>[<span class="optional">hmac:</span>]name:key</code></em></code>] [<code class="option">-4</code>] [<code class="option">-6</code>] [name] [type] [class] [queryopt...]</p></div>
33 <div class="cmdsynopsis"><p><code class="command">dig</code> [<code class="option">-h</code>]</p></div>
34 <div class="cmdsynopsis"><p><code class="command">dig</code> [global-queryopt...] [query...]</p></div>
36 <div class="refsect1" lang="en">
37 <a name="id2543544"></a><h2>DESCRIPTION</h2>
38 <p><span><strong class="command">dig</strong></span>
39 (domain information groper) is a flexible tool
40 for interrogating DNS name servers. It performs DNS lookups and
41 displays the answers that are returned from the name server(s) that
42 were queried. Most DNS administrators use <span><strong class="command">dig</strong></span> to
43 troubleshoot DNS problems because of its flexibility, ease of use and
44 clarity of output. Other lookup tools tend to have less functionality
45 than <span><strong class="command">dig</strong></span>.
48 Although <span><strong class="command">dig</strong></span> is normally used with
50 arguments, it also has a batch mode of operation for reading lookup
51 requests from a file. A brief summary of its command-line arguments
52 and options is printed when the <code class="option">-h</code> option is given.
53 Unlike earlier versions, the BIND 9 implementation of
54 <span><strong class="command">dig</strong></span> allows multiple lookups to be issued
59 Unless it is told to query a specific name server,
60 <span><strong class="command">dig</strong></span> will try each of the servers listed in
61 <code class="filename">/etc/resolv.conf</code>. If no usable server addresses
62 are found, <span><strong class="command">dig</strong></span> will send the query to the local
66 When no command line arguments or options are given,
67 <span><strong class="command">dig</strong></span> will perform an NS query for "." (the root).
70 It is possible to set per-user defaults for <span><strong class="command">dig</strong></span> via
71 <code class="filename">${HOME}/.digrc</code>. This file is read and
73 are applied before the command line arguments.
76 The IN and CH class names overlap with the IN and CH top level
77 domain names. Either use the <code class="option">-t</code> and
78 <code class="option">-c</code> options to specify the type and class,
79 use the <code class="option">-q</code> the specify the domain name, or
80 use "IN." and "CH." when looking up these top level domains.
83 <div class="refsect1" lang="en">
84 <a name="id2543623"></a><h2>SIMPLE USAGE</h2>
86 A typical invocation of <span><strong class="command">dig</strong></span> looks like:
88 <pre class="programlisting"> dig @server name type </pre>
93 <div class="variablelist"><dl>
94 <dt><span class="term"><code class="constant">server</code></span></dt>
97 is the name or IP address of the name server to query. This
98 can be an IPv4 address in dotted-decimal notation or an IPv6
99 address in colon-delimited notation. When the supplied
100 <em class="parameter"><code>server</code></em> argument is a hostname,
101 <span><strong class="command">dig</strong></span> resolves that name before querying
105 If no <em class="parameter"><code>server</code></em> argument is
106 provided, <span><strong class="command">dig</strong></span> consults
107 <code class="filename">/etc/resolv.conf</code>; if an
108 address is found there, it queries the name server at
109 that address. If either of the <code class="option">-4</code> or
110 <code class="option">-6</code> options are in use, then
111 only addresses for the corresponding transport
112 will be tried. If no usable addresses are found,
113 <span><strong class="command">dig</strong></span> will send the query to the
114 local host. The reply from the name server that
115 responds is displayed.
118 <dt><span class="term"><code class="constant">name</code></span></dt>
120 is the name of the resource record that is to be looked up.
122 <dt><span class="term"><code class="constant">type</code></span></dt>
124 indicates what type of query is required —
125 ANY, A, MX, SIG, etc.
126 <em class="parameter"><code>type</code></em> can be any valid query
128 <em class="parameter"><code>type</code></em> argument is supplied,
129 <span><strong class="command">dig</strong></span> will perform a lookup for an
136 <div class="refsect1" lang="en">
137 <a name="id2543726"></a><h2>OPTIONS</h2>
139 The <code class="option">-b</code> option sets the source IP address of the query
140 to <em class="parameter"><code>address</code></em>. This must be a valid
142 one of the host's network interfaces or "0.0.0.0" or "::". An optional
144 may be specified by appending "#<port>"
147 The default query class (IN for internet) is overridden by the
148 <code class="option">-c</code> option. <em class="parameter"><code>class</code></em> is
150 class, such as HS for Hesiod records or CH for Chaosnet records.
153 The <code class="option">-f</code> option makes <span><strong class="command">dig </strong></span>
155 in batch mode by reading a list of lookup requests to process from the
156 file <em class="parameter"><code>filename</code></em>. The file contains a
158 queries, one per line. Each entry in the file should be organized in
159 the same way they would be presented as queries to
160 <span><strong class="command">dig</strong></span> using the command-line interface.
163 The <code class="option">-m</code> option enables memory usage debugging.
167 If a non-standard port number is to be queried, the
168 <code class="option">-p</code> option is used. <em class="parameter"><code>port#</code></em> is
169 the port number that <span><strong class="command">dig</strong></span> will send its
171 instead of the standard DNS port number 53. This option would be used
172 to test a name server that has been configured to listen for queries
173 on a non-standard port number.
176 The <code class="option">-4</code> option forces <span><strong class="command">dig</strong></span>
178 use IPv4 query transport. The <code class="option">-6</code> option forces
179 <span><strong class="command">dig</strong></span> to only use IPv6 query transport.
182 The <code class="option">-t</code> option sets the query type to
183 <em class="parameter"><code>type</code></em>. It can be any valid query type
185 supported in BIND 9. The default query type is "A", unless the
186 <code class="option">-x</code> option is supplied to indicate a reverse lookup.
187 A zone transfer can be requested by specifying a type of AXFR. When
188 an incremental zone transfer (IXFR) is required,
189 <em class="parameter"><code>type</code></em> is set to <code class="literal">ixfr=N</code>.
190 The incremental zone transfer will contain the changes made to the zone
191 since the serial number in the zone's SOA record was
192 <em class="parameter"><code>N</code></em>.
195 The <code class="option">-q</code> option sets the query name to
196 <em class="parameter"><code>name</code></em>. This is useful to distinguish the
197 <em class="parameter"><code>name</code></em> from other arguments.
200 The <code class="option">-v</code> causes <span><strong class="command">dig</strong></span> to
201 print the version number and exit.
204 Reverse lookups — mapping addresses to names — are simplified by the
205 <code class="option">-x</code> option. <em class="parameter"><code>addr</code></em> is
207 address in dotted-decimal notation, or a colon-delimited IPv6 address.
208 When this option is used, there is no need to provide the
209 <em class="parameter"><code>name</code></em>, <em class="parameter"><code>class</code></em> and
210 <em class="parameter"><code>type</code></em> arguments. <span><strong class="command">dig</strong></span>
211 automatically performs a lookup for a name like
212 <code class="literal">11.12.13.10.in-addr.arpa</code> and sets the
214 class to PTR and IN respectively. By default, IPv6 addresses are
215 looked up using nibble format under the IP6.ARPA domain.
216 To use the older RFC1886 method using the IP6.INT domain
217 specify the <code class="option">-i</code> option. Bit string labels (RFC2874)
218 are now experimental and are not attempted.
221 To sign the DNS queries sent by <span><strong class="command">dig</strong></span> and
223 responses using transaction signatures (TSIG), specify a TSIG key file
224 using the <code class="option">-k</code> option. You can also specify the TSIG
225 key itself on the command line using the <code class="option">-y</code> option;
226 <em class="parameter"><code>hmac</code></em> is the type of the TSIG, default HMAC-MD5,
227 <em class="parameter"><code>name</code></em> is the name of the TSIG key and
228 <em class="parameter"><code>key</code></em> is the actual key. The key is a
230 encoded string, typically generated by
231 <span class="citerefentry"><span class="refentrytitle">dnssec-keygen</span>(8)</span>.
233 Caution should be taken when using the <code class="option">-y</code> option on
234 multi-user systems as the key can be visible in the output from
235 <span class="citerefentry"><span class="refentrytitle">ps</span>(1)</span>
236 or in the shell's history file. When
237 using TSIG authentication with <span><strong class="command">dig</strong></span>, the name
238 server that is queried needs to know the key and algorithm that is
239 being used. In BIND, this is done by providing appropriate
240 <span><strong class="command">key</strong></span> and <span><strong class="command">server</strong></span> statements in
241 <code class="filename">named.conf</code>.
244 <div class="refsect1" lang="en">
245 <a name="id2544018"></a><h2>QUERY OPTIONS</h2>
246 <p><span><strong class="command">dig</strong></span>
247 provides a number of query options which affect
248 the way in which lookups are made and the results displayed. Some of
249 these set or reset flag bits in the query header, some determine which
250 sections of the answer get printed, and others determine the timeout
251 and retry strategies.
254 Each query option is identified by a keyword preceded by a plus sign
255 (<code class="literal">+</code>). Some keywords set or reset an
256 option. These may be preceded
257 by the string <code class="literal">no</code> to negate the meaning of
259 keywords assign values to options like the timeout interval. They
260 have the form <code class="option">+keyword=value</code>.
261 The query options are:
264 <div class="variablelist"><dl>
265 <dt><span class="term"><code class="option">+[no]aaflag</code></span></dt>
267 A synonym for <em class="parameter"><code>+[no]aaonly</code></em>.
269 <dt><span class="term"><code class="option">+[no]aaonly</code></span></dt>
271 Sets the "aa" flag in the query.
273 <dt><span class="term"><code class="option">+[no]additional</code></span></dt>
275 Display [do not display] the additional section of a
276 reply. The default is to display it.
278 <dt><span class="term"><code class="option">+[no]adflag</code></span></dt>
280 Set [do not set] the AD (authentic data) bit in the
281 query. This requests the server to return whether
282 all of the answer and authority sections have all
283 been validated as secure according to the security
284 policy of the server. AD=1 indicates that all records
285 have been validated as secure and the answer is not
286 from a OPT-OUT range. AD=0 indicate that some part
287 of the answer was insecure or not validated. This
288 bit is set by default.
290 <dt><span class="term"><code class="option">+[no]all</code></span></dt>
292 Set or clear all display flags.
294 <dt><span class="term"><code class="option">+[no]answer</code></span></dt>
296 Display [do not display] the answer section of a
297 reply. The default is to display it.
299 <dt><span class="term"><code class="option">+[no]authority</code></span></dt>
301 Display [do not display] the authority section of a
302 reply. The default is to display it.
304 <dt><span class="term"><code class="option">+[no]besteffort</code></span></dt>
306 Attempt to display the contents of messages which are
307 malformed. The default is to not display malformed
310 <dt><span class="term"><code class="option">+bufsize=B</code></span></dt>
312 Set the UDP message buffer size advertised using EDNS0
313 to <em class="parameter"><code>B</code></em> bytes. The maximum and
314 minimum sizes of this buffer are 65535 and 0 respectively.
315 Values outside this range are rounded up or down
316 appropriately. Values other than zero will cause a
317 EDNS query to be sent.
319 <dt><span class="term"><code class="option">+[no]cdflag</code></span></dt>
321 Set [do not set] the CD (checking disabled) bit in
322 the query. This requests the server to not perform
323 DNSSEC validation of responses.
325 <dt><span class="term"><code class="option">+[no]cl</code></span></dt>
327 Display [do not display] the CLASS when printing the
330 <dt><span class="term"><code class="option">+[no]cmd</code></span></dt>
332 Toggles the printing of the initial comment in the
333 output identifying the version of <span><strong class="command">dig</strong></span>
334 and the query options that have been applied. This
335 comment is printed by default.
337 <dt><span class="term"><code class="option">+[no]comments</code></span></dt>
339 Toggle the display of comment lines in the output.
340 The default is to print comments.
342 <dt><span class="term"><code class="option">+[no]defname</code></span></dt>
344 Deprecated, treated as a synonym for
345 <em class="parameter"><code>+[no]search</code></em>
347 <dt><span class="term"><code class="option">+[no]dnssec</code></span></dt>
349 Requests DNSSEC records be sent by setting the DNSSEC
350 OK bit (DO) in the OPT record in the additional section
353 <dt><span class="term"><code class="option">+domain=somename</code></span></dt>
355 Set the search list to contain the single domain
356 <em class="parameter"><code>somename</code></em>, as if specified in
357 a <span><strong class="command">domain</strong></span> directive in
358 <code class="filename">/etc/resolv.conf</code>, and enable
359 search list processing as if the
360 <em class="parameter"><code>+search</code></em> option were given.
362 <dt><span class="term"><code class="option">+[no]edns[=#]</code></span></dt>
364 Specify the EDNS version to query with. Valid values
365 are 0 to 255. Setting the EDNS version will cause
366 a EDNS query to be sent. <code class="option">+noedns</code>
367 clears the remembered EDNS version. EDNS is set to
370 <dt><span class="term"><code class="option">+[no]fail</code></span></dt>
372 Do not try the next server if you receive a SERVFAIL.
373 The default is to not try the next server which is
374 the reverse of normal stub resolver behavior.
376 <dt><span class="term"><code class="option">+[no]identify</code></span></dt>
378 Show [or do not show] the IP address and port number
379 that supplied the answer when the
380 <em class="parameter"><code>+short</code></em> option is enabled. If
381 short form answers are requested, the default is not
382 to show the source address and port number of the
383 server that provided the answer.
385 <dt><span class="term"><code class="option">+[no]ignore</code></span></dt>
387 Ignore truncation in UDP responses instead of retrying
388 with TCP. By default, TCP retries are performed.
390 <dt><span class="term"><code class="option">+[no]keepopen</code></span></dt>
392 Keep the TCP socket open between queries and reuse
393 it rather than creating a new TCP socket for each
394 lookup. The default is <code class="option">+nokeepopen</code>.
396 <dt><span class="term"><code class="option">+[no]multiline</code></span></dt>
398 Print records like the SOA records in a verbose
399 multi-line format with human-readable comments. The
400 default is to print each record on a single line, to
401 facilitate machine parsing of the <span><strong class="command">dig</strong></span>
404 <dt><span class="term"><code class="option">+ndots=D</code></span></dt>
406 Set the number of dots that have to appear in
407 <em class="parameter"><code>name</code></em> to <em class="parameter"><code>D</code></em>
408 for it to be considered absolute. The default value
409 is that defined using the ndots statement in
410 <code class="filename">/etc/resolv.conf</code>, or 1 if no
411 ndots statement is present. Names with fewer dots
412 are interpreted as relative names and will be searched
413 for in the domains listed in the <code class="option">search</code>
414 or <code class="option">domain</code> directive in
415 <code class="filename">/etc/resolv.conf</code>.
417 <dt><span class="term"><code class="option">+[no]nsid</code></span></dt>
419 Include an EDNS name server ID request when sending
422 <dt><span class="term"><code class="option">+[no]nssearch</code></span></dt>
424 When this option is set, <span><strong class="command">dig</strong></span>
425 attempts to find the authoritative name servers for
426 the zone containing the name being looked up and
427 display the SOA record that each name server has for
430 <dt><span class="term"><code class="option">+[no]onesoa</code></span></dt>
432 Print only one (starting) SOA record when performing
433 an AXFR. The default is to print both the starting
434 and ending SOA records.
436 <dt><span class="term"><code class="option">+[no]qr</code></span></dt>
438 Print [do not print] the query as it is sent. By
439 default, the query is not printed.
441 <dt><span class="term"><code class="option">+[no]question</code></span></dt>
443 Print [do not print] the question section of a query
444 when an answer is returned. The default is to print
445 the question section as a comment.
447 <dt><span class="term"><code class="option">+[no]recurse</code></span></dt>
449 Toggle the setting of the RD (recursion desired) bit
450 in the query. This bit is set by default, which means
451 <span><strong class="command">dig</strong></span> normally sends recursive
452 queries. Recursion is automatically disabled when
453 the <em class="parameter"><code>+nssearch</code></em> or
454 <em class="parameter"><code>+trace</code></em> query options are used.
456 <dt><span class="term"><code class="option">+retry=T</code></span></dt>
458 Sets the number of times to retry UDP queries to
459 server to <em class="parameter"><code>T</code></em> instead of the
460 default, 2. Unlike <em class="parameter"><code>+tries</code></em>,
461 this does not include the initial query.
463 <dt><span class="term"><code class="option">+[no]rrcomments</code></span></dt>
465 Toggle the display of per-record comments in the
466 output (for example, human-readable key information
467 about DNSKEY records). The default is not to print
468 record comments unless multiline mode is active.
470 <dt><span class="term"><code class="option">+[no]search</code></span></dt>
472 Use [do not use] the search list defined by the
473 searchlist or domain directive in
474 <code class="filename">resolv.conf</code> (if any). The search
475 list is not used by default.
477 <dt><span class="term"><code class="option">+[no]short</code></span></dt>
479 Provide a terse answer. The default is to print the
480 answer in a verbose form.
482 <dt><span class="term"><code class="option">+[no]showsearch</code></span></dt>
484 Perform [do not perform] a search showing intermediate
487 <dt><span class="term"><code class="option">+[no]sigchase</code></span></dt>
489 Chase DNSSEC signature chains. Requires dig be
490 compiled with -DDIG_SIGCHASE.
492 <dt><span class="term"><code class="option">+split=W</code></span></dt>
494 Split long hex- or base64-formatted fields in resource
495 records into chunks of <em class="parameter"><code>W</code></em>
496 characters (where <em class="parameter"><code>W</code></em> is rounded
497 up to the nearest multiple of 4).
498 <em class="parameter"><code>+nosplit</code></em> or
499 <em class="parameter"><code>+split=0</code></em> causes fields not to
500 be split at all. The default is 56 characters, or
501 44 characters when multiline mode is active.
503 <dt><span class="term"><code class="option">+[no]stats</code></span></dt>
505 This query option toggles the printing of statistics:
506 when the query was made, the size of the reply and
507 so on. The default behavior is to print the query
510 <dt><span class="term"><code class="option">+[no]tcp</code></span></dt>
512 Use [do not use] TCP when querying name servers. The
513 default behavior is to use UDP unless an
514 <code class="literal">ixfr=N</code> query is requested, in which
515 case the default is TCP. AXFR queries always use
518 <dt><span class="term"><code class="option">+time=T</code></span></dt>
521 Sets the timeout for a query to
522 <em class="parameter"><code>T</code></em> seconds. The default
523 timeout is 5 seconds.
524 An attempt to set <em class="parameter"><code>T</code></em> to less
526 in a query timeout of 1 second being applied.
528 <dt><span class="term"><code class="option">+[no]topdown</code></span></dt>
530 When chasing DNSSEC signature chains perform a top-down
531 validation. Requires dig be compiled with -DDIG_SIGCHASE.
533 <dt><span class="term"><code class="option">+[no]trace</code></span></dt>
536 Toggle tracing of the delegation path from the root
537 name servers for the name being looked up. Tracing
538 is disabled by default. When tracing is enabled,
539 <span><strong class="command">dig</strong></span> makes iterative queries to
540 resolve the name being looked up. It will follow
541 referrals from the root servers, showing the answer
542 from each server that was used to resolve the lookup.
545 <span><strong class="command">+dnssec</strong></span> is also set when +trace
546 is set to better emulate the default queries from a
550 <dt><span class="term"><code class="option">+tries=T</code></span></dt>
552 Sets the number of times to try UDP queries to server
553 to <em class="parameter"><code>T</code></em> instead of the default,
554 3. If <em class="parameter"><code>T</code></em> is less than or equal
555 to zero, the number of tries is silently rounded up
558 <dt><span class="term"><code class="option">+trusted-key=####</code></span></dt>
561 Specifies a file containing trusted keys to be used
562 with <code class="option">+sigchase</code>. Each DNSKEY record
563 must be on its own line.
566 If not specified, <span><strong class="command">dig</strong></span> will look
567 for <code class="filename">/etc/trusted-key.key</code> then
568 <code class="filename">trusted-key.key</code> in the current
572 Requires dig be compiled with -DDIG_SIGCHASE.
575 <dt><span class="term"><code class="option">+[no]ttlid</code></span></dt>
577 Display [do not display] the TTL when printing the
580 <dt><span class="term"><code class="option">+[no]vc</code></span></dt>
582 Use [do not use] TCP when querying name servers. This
583 alternate syntax to <em class="parameter"><code>+[no]tcp</code></em>
584 is provided for backwards compatibility. The "vc"
585 stands for "virtual circuit".
592 <div class="refsect1" lang="en">
593 <a name="id2545168"></a><h2>MULTIPLE QUERIES</h2>
595 The BIND 9 implementation of <span><strong class="command">dig </strong></span>
597 specifying multiple queries on the command line (in addition to
598 supporting the <code class="option">-f</code> batch file option). Each of those
599 queries can be supplied with its own set of flags, options and query
603 In this case, each <em class="parameter"><code>query</code></em> argument
605 individual query in the command-line syntax described above. Each
606 consists of any of the standard options and flags, the name to be
607 looked up, an optional query type and class and any query options that
608 should be applied to that query.
611 A global set of query options, which should be applied to all queries,
612 can also be supplied. These global query options must precede the
613 first tuple of name, class, type, options, flags, and query options
614 supplied on the command line. Any global query options (except
615 the <code class="option">+[no]cmd</code> option) can be
616 overridden by a query-specific set of query options. For example:
618 <pre class="programlisting">
619 dig +qr www.isc.org any -x 127.0.0.1 isc.org ns +noqr
622 shows how <span><strong class="command">dig</strong></span> could be used from the
624 to make three lookups: an ANY query for <code class="literal">www.isc.org</code>, a
625 reverse lookup of 127.0.0.1 and a query for the NS records of
626 <code class="literal">isc.org</code>.
628 A global query option of <em class="parameter"><code>+qr</code></em> is
630 that <span><strong class="command">dig</strong></span> shows the initial query it made
632 lookup. The final query has a local query option of
633 <em class="parameter"><code>+noqr</code></em> which means that <span><strong class="command">dig</strong></span>
634 will not print the initial query when it looks up the NS records for
635 <code class="literal">isc.org</code>.
638 <div class="refsect1" lang="en">
639 <a name="id2545229"></a><h2>IDN SUPPORT</h2>
641 If <span><strong class="command">dig</strong></span> has been built with IDN (internationalized
642 domain name) support, it can accept and display non-ASCII domain names.
643 <span><strong class="command">dig</strong></span> appropriately converts character encoding of
644 domain name before sending a request to DNS server or displaying a
645 reply from the server.
646 If you'd like to turn off the IDN support for some reason, defines
647 the <code class="envar">IDN_DISABLE</code> environment variable.
648 The IDN support is disabled if the variable is set when
649 <span><strong class="command">dig</strong></span> runs.
652 <div class="refsect1" lang="en">
653 <a name="id2545252"></a><h2>FILES</h2>
654 <p><code class="filename">/etc/resolv.conf</code>
656 <p><code class="filename">${HOME}/.digrc</code>
659 <div class="refsect1" lang="en">
660 <a name="id2545269"></a><h2>SEE ALSO</h2>
661 <p><span class="citerefentry"><span class="refentrytitle">host</span>(1)</span>,
662 <span class="citerefentry"><span class="refentrytitle">named</span>(8)</span>,
663 <span class="citerefentry"><span class="refentrytitle">dnssec-keygen</span>(8)</span>,
664 <em class="citetitle">RFC1035</em>.
667 <div class="refsect1" lang="en">
668 <a name="id2545306"></a><h2>BUGS</h2>
670 There are probably too many query options.