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<div class="refentry">
<a name="man.rndc"></a><div class="titlepage"></div>
<div class="refnamediv">
<h2>Name</h2>
<p>
<span class="application">rndc</span>
— name server control utility
</p>
</div>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<div class="cmdsynopsis"><p>
<code class="command">rndc</code>
[<code class="option">-b <em class="replaceable"><code>source-address</code></em></code>]
[<code class="option">-c <em class="replaceable"><code>config-file</code></em></code>]
[<code class="option">-k <em class="replaceable"><code>key-file</code></em></code>]
[<code class="option">-s <em class="replaceable"><code>server</code></em></code>]
[<code class="option">-p <em class="replaceable"><code>port</code></em></code>]
[<code class="option">-q</code>]
[<code class="option">-r</code>]
[<code class="option">-V</code>]
[<code class="option">-y <em class="replaceable"><code>key_id</code></em></code>]
[
[<code class="option">-4</code>]
| [<code class="option">-6</code>]
]
{command}
</p></div>
</div>
<div class="refsection">
<a name="id-1.13.38.7"></a><h2>DESCRIPTION</h2>
<p><span class="command"><strong>rndc</strong></span>
controls the operation of a name
server. It supersedes the <span class="command"><strong>ndc</strong></span> utility
that was provided in old BIND releases. If
<span class="command"><strong>rndc</strong></span> is invoked with no command line
options or arguments, it prints a short summary of the
supported commands and the available options and their
arguments.
</p>
<p><span class="command"><strong>rndc</strong></span>
communicates with the name server over a TCP connection, sending
commands authenticated with digital signatures. In the current
versions of
<span class="command"><strong>rndc</strong></span> and <span class="command"><strong>named</strong></span>,
the only supported authentication algorithms are HMAC-MD5
(for compatibility), HMAC-SHA1, HMAC-SHA224, HMAC-SHA256
(default), HMAC-SHA384 and HMAC-SHA512.
They use a shared secret on each end of the connection.
This provides TSIG-style authentication for the command
request and the name server's response. All commands sent
over the channel must be signed by a key_id known to the
server.
</p>
<p><span class="command"><strong>rndc</strong></span>
reads a configuration file to
determine how to contact the name server and decide what
algorithm and key it should use.
</p>
</div>
<div class="refsection">
<a name="id-1.13.38.8"></a><h2>OPTIONS</h2>
<div class="variablelist"><dl class="variablelist">
<dt><span class="term">-4</span></dt>
<dd>
<p>
Use IPv4 only.
</p>
</dd>
<dt><span class="term">-6</span></dt>
<dd>
<p>
Use IPv6 only.
</p>
</dd>
<dt><span class="term">-b <em class="replaceable"><code>source-address</code></em></span></dt>
<dd>
<p>
Use <em class="replaceable"><code>source-address</code></em>
as the source address for the connection to the server.
Multiple instances are permitted to allow setting of both
the IPv4 and IPv6 source addresses.
</p>
</dd>
<dt><span class="term">-c <em class="replaceable"><code>config-file</code></em></span></dt>
<dd>
<p>
Use <em class="replaceable"><code>config-file</code></em>
as the configuration file instead of the default,
<code class="filename">/etc/rndc.conf</code>.
</p>
</dd>
<dt><span class="term">-k <em class="replaceable"><code>key-file</code></em></span></dt>
<dd>
<p>
Use <em class="replaceable"><code>key-file</code></em>
as the key file instead of the default,
<code class="filename">/etc/rndc.key</code>. The key in
<code class="filename">/etc/rndc.key</code> will be used to
authenticate
commands sent to the server if the <em class="replaceable"><code>config-file</code></em>
does not exist.
</p>
</dd>
<dt><span class="term">-s <em class="replaceable"><code>server</code></em></span></dt>
<dd>
<p><em class="replaceable"><code>server</code></em> is
the name or address of the server which matches a
server statement in the configuration file for
<span class="command"><strong>rndc</strong></span>. If no server is supplied on the
command line, the host named by the default-server clause
in the options statement of the <span class="command"><strong>rndc</strong></span>
configuration file will be used.
</p>
</dd>
<dt><span class="term">-p <em class="replaceable"><code>port</code></em></span></dt>
<dd>
<p>
Send commands to TCP port
<em class="replaceable"><code>port</code></em>
instead
of BIND 9's default control channel port, 953.
</p>
</dd>
<dt><span class="term">-q</span></dt>
<dd>
<p>
Quiet mode: Message text returned by the server
will not be printed except when there is an error.
</p>
</dd>
<dt><span class="term">-r</span></dt>
<dd>
<p>
Instructs <span class="command"><strong>rndc</strong></span> to print the result code
returned by <span class="command"><strong>named</strong></span> after executing the
requested command (e.g., ISC_R_SUCCESS, ISC_R_FAILURE, etc).
</p>
</dd>
<dt><span class="term">-V</span></dt>
<dd>
<p>
Enable verbose logging.
</p>
</dd>
<dt><span class="term">-y <em class="replaceable"><code>key_id</code></em></span></dt>
<dd>
<p>
Use the key <em class="replaceable"><code>key_id</code></em>
from the configuration file.
<em class="replaceable"><code>key_id</code></em>
must be
known by <span class="command"><strong>named</strong></span> with the same algorithm and secret string
in order for control message validation to succeed.
If no <em class="replaceable"><code>key_id</code></em>
is specified, <span class="command"><strong>rndc</strong></span> will first look
for a key clause in the server statement of the server
being used, or if no server statement is present for that
host, then the default-key clause of the options statement.
Note that the configuration file contains shared secrets
which are used to send authenticated control commands
to name servers. It should therefore not have general read
or write access.
</p>
</dd>
</dl></div>
</div>
<div class="refsection">
<a name="id-1.13.38.9"></a><h2>COMMANDS</h2>
<p>
A list of commands supported by <span class="command"><strong>rndc</strong></span> can
be seen by running <span class="command"><strong>rndc</strong></span> without arguments.
</p>
<p>
Currently supported commands are:
</p>
<div class="variablelist"><dl class="variablelist">
<dt><span class="term"><strong class="userinput"><code>addzone <em class="replaceable"><code>zone</code></em> [<span class="optional"><em class="replaceable"><code>class</code></em> [<span class="optional"><em class="replaceable"><code>view</code></em></span>]</span>] <em class="replaceable"><code>configuration</code></em> </code></strong></span></dt>
<dd>
<p>
Add a zone while the server is running. This
command requires the
<span class="command"><strong>allow-new-zones</strong></span> option to be set
to <strong class="userinput"><code>yes</code></strong>. The
<em class="replaceable"><code>configuration</code></em> string
specified on the command line is the zone
configuration text that would ordinarily be
placed in <code class="filename">named.conf</code>.
</p>
<p>
The configuration is saved in a file called
<code class="filename"><em class="replaceable"><code>viewname</code></em>.nzf</code>
(or, if <span class="command"><strong>named</strong></span> is compiled with
liblmdb, an LMDB database file called
<code class="filename"><em class="replaceable"><code>viewname</code></em>.nzd</code>).
<em class="replaceable"><code>viewname</code></em> is the
name of the view, unless the view name contains characters
that are incompatible with use as a file name, in which case
a cryptographic hash of the view name is used instead.
When <span class="command"><strong>named</strong></span> is
restarted, the file will be loaded into the view
configuration, so that zones that were added
can persist after a restart.
</p>
<p>
This sample <span class="command"><strong>addzone</strong></span> command
would add the zone <code class="literal">example.com</code>
to the default view:
</p>
<p>
<code class="prompt">$ </code><strong class="userinput"><code>rndc addzone example.com '{ type master; file "example.com.db"; };'</code></strong>
</p>
<p>
(Note the brackets and semi-colon around the zone
configuration text.)
</p>
<p>
See also <span class="command"><strong>rndc delzone</strong></span> and <span class="command"><strong>rndc modzone</strong></span>.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>delzone [<span class="optional">-clean</span>] <em class="replaceable"><code>zone</code></em> [<span class="optional"><em class="replaceable"><code>class</code></em> [<span class="optional"><em class="replaceable"><code>view</code></em></span>]</span>] </code></strong></span></dt>
<dd>
<p>
Delete a zone while the server is running.
</p>
<p>
If the <code class="option">-clean</code> argument is specified,
the zone's master file (and journal file, if any)
will be deleted along with the zone. Without the
<code class="option">-clean</code> option, zone files must
be cleaned up by hand. (If the zone is of
type "slave" or "stub", the files needing to
be cleaned up will be reported in the output
of the <span class="command"><strong>rndc delzone</strong></span> command.)
</p>
<p>
If the zone was originally added via
<span class="command"><strong>rndc addzone</strong></span>, then it will be
removed permanently. However, if it was originally
configured in <code class="filename">named.conf</code>, then
that original configuration is still in place; when
the server is restarted or reconfigured, the zone will
come back. To remove it permanently, it must also be
removed from <code class="filename">named.conf</code>
</p>
<p>
See also <span class="command"><strong>rndc addzone</strong></span> and <span class="command"><strong>rndc modzone</strong></span>.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>dnstap ( -reopen | -roll [<span class="optional"><em class="replaceable"><code>number</code></em></span>] )</code></strong></span></dt>
<dd>
<p>
Close and re-open DNSTAP output files.
<span class="command"><strong>rndc dnstap -reopen</strong></span> allows the output
file to be renamed externally, so
that <span class="command"><strong>named</strong></span> can truncate and re-open it.
<span class="command"><strong>rndc dnstap -roll</strong></span> causes the output file
to be rolled automatically, similar to log files; the most
recent output file has ".0" appended to its name; the
previous most recent output file is moved to ".1", and so on.
If <em class="replaceable"><code>number</code></em> is specified, then the
number of backup log files is limited to that number.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>dumpdb [<span class="optional">-all|-cache|-zones|-adb|-bad|-fail</span>] [<span class="optional"><em class="replaceable"><code>view ...</code></em></span>]</code></strong></span></dt>
<dd>
<p>
Dump the server's caches (default) and/or zones to
the dump file for the specified views. If no view
is specified, all views are dumped.
(See the <span class="command"><strong>dump-file</strong></span> option in
the BIND 9 Administrator Reference Manual.)
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>flush</code></strong></span></dt>
<dd>
<p>
Flushes the server's cache.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>flushname</code></strong> <em class="replaceable"><code>name</code></em> [<span class="optional"><em class="replaceable"><code>view</code></em></span>] </span></dt>
<dd>
<p>
Flushes the given name from the view's DNS cache
and, if applicable, from the view's nameserver address
database, bad server cache and SERVFAIL cache.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>flushtree</code></strong> <em class="replaceable"><code>name</code></em> [<span class="optional"><em class="replaceable"><code>view</code></em></span>] </span></dt>
<dd>
<p>
Flushes the given name, and all of its subdomains,
from the view's DNS cache, address database,
bad server cache, and SERVFAIL cache.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>freeze [<span class="optional"><em class="replaceable"><code>zone</code></em> [<span class="optional"><em class="replaceable"><code>class</code></em> [<span class="optional"><em class="replaceable"><code>view</code></em></span>]</span>]</span>]</code></strong></span></dt>
<dd>
<p>
Suspend updates to a dynamic zone. If no zone is
specified, then all zones are suspended. This allows
manual edits to be made to a zone normally updated by
dynamic update. It also causes changes in the
journal file to be synced into the master file.
All dynamic update attempts will be refused while
the zone is frozen.
</p>
<p>
See also <span class="command"><strong>rndc thaw</strong></span>.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>halt [<span class="optional">-p</span>]</code></strong></span></dt>
<dd>
<p>
Stop the server immediately. Recent changes
made through dynamic update or IXFR are not saved to
the master files, but will be rolled forward from the
journal files when the server is restarted.
If <code class="option">-p</code> is specified <span class="command"><strong>named</strong></span>'s process id is returned.
This allows an external process to determine when <span class="command"><strong>named</strong></span>
had completed halting.
</p>
<p>
See also <span class="command"><strong>rndc stop</strong></span>.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>loadkeys <em class="replaceable"><code>zone</code></em> [<span class="optional"><em class="replaceable"><code>class</code></em> [<span class="optional"><em class="replaceable"><code>view</code></em></span>]</span>]</code></strong></span></dt>
<dd>
<p>
Fetch all DNSSEC keys for the given zone
from the key directory. If they are within
their publication period, merge them into the
zone's DNSKEY RRset. Unlike <span class="command"><strong>rndc
sign</strong></span>, however, the zone is not
immediately re-signed by the new keys, but is
allowed to incrementally re-sign over time.
</p>
<p>
This command requires that the
<span class="command"><strong>auto-dnssec</strong></span> zone option
be set to <code class="literal">maintain</code>,
and also requires the zone to be configured to
allow dynamic DNS.
(See "Dynamic Update Policies" in the Administrator
Reference Manual for more details.)
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>managed-keys <em class="replaceable"><code>(status | refresh | sync | destroy)</code></em> [<span class="optional"><em class="replaceable"><code>class</code></em> [<span class="optional"><em class="replaceable"><code>view</code></em></span>]</span>]</code></strong></span></dt>
<dd>
<p>
Inspect and control the "managed-keys" database which
handles RFC 5011 DNSSEC trust anchor maintenance. If a view
is specified, these commands are applied to that view;
otherwise they are applied to all views.
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
<p>
When run with the <code class="literal">status</code> keyword, prints
the current status of the managed-keys database.
</p>
</li>
<li class="listitem">
<p>
When run with the <code class="literal">refresh</code> keyword,
forces an immediate refresh query to be sent for all
the managed keys, updating the managed-keys database
if any new keys are found, without waiting the normal
refresh interval.
</p>
</li>
<li class="listitem">
<p>
When run with the <code class="literal">sync</code> keyword, forces an
immediate dump of the managed-keys database to disk
(in the file <code class="filename">managed-keys.bind</code> or
(<code class="filename"><em class="replaceable"><code>viewname</code></em>.mkeys</code>).
This synchronizes the database with its journal file, so
that the database's current contents can be inspected
visually.
</p>
</li>
<li class="listitem">
<p>
When run with the <code class="literal">destroy</code> keyword, the
managed-keys database is shut down and deleted, and all key
maintenance is terminated. This command should be used only
with extreme caution.
</p>
<p>
Existing keys that are already trusted are not deleted
from memory; DNSSEC validation can continue after this
command is used. However, key maintenance operations will
cease until <span class="command"><strong>named</strong></span> is restarted or
reconfigured, and all existing key maintenance state
will be deleted.
</p>
<p>
Running <span class="command"><strong>rndc reconfig</strong></span> or restarting
<span class="command"><strong>named</strong></span> immediately after this command
will cause key maintenance to be reinitialized from scratch,
just as if the server were being started for the first time.
This is primarily intended for testing, but it may also be
used, for example, to jumpstart the acquisition of new keys
in the event of a trust anchor rollover, or as a
brute-force repair for key maintenance problems.
</p>
</li>
</ul></div>
</dd>
<dt><span class="term"><strong class="userinput"><code>modzone <em class="replaceable"><code>zone</code></em> [<span class="optional"><em class="replaceable"><code>class</code></em> [<span class="optional"><em class="replaceable"><code>view</code></em></span>]</span>] <em class="replaceable"><code>configuration</code></em> </code></strong></span></dt>
<dd>
<p>
Modify the configuration of a zone while the server
is running. This command requires the
<span class="command"><strong>allow-new-zones</strong></span> option to be
set to <strong class="userinput"><code>yes</code></strong>. As with
<span class="command"><strong>addzone</strong></span>, the
<em class="replaceable"><code>configuration</code></em> string
specified on the command line is the zone
configuration text that would ordinarily be
placed in <code class="filename">named.conf</code>.
</p>
<p>
If the zone was originally added via
<span class="command"><strong>rndc addzone</strong></span>, the configuration
changes will be recorded permanently and will still be
in effect after the server is restarted or reconfigured.
However, if it was originally configured in
<code class="filename">named.conf</code>, then that original
configuration is still in place; when the server is
restarted or reconfigured, the zone will revert to
its original configuration. To make the changes
permanent, it must also be modified in
<code class="filename">named.conf</code>
</p>
<p>
See also <span class="command"><strong>rndc addzone</strong></span> and <span class="command"><strong>rndc delzone</strong></span>.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>notify <em class="replaceable"><code>zone</code></em> [<span class="optional"><em class="replaceable"><code>class</code></em> [<span class="optional"><em class="replaceable"><code>view</code></em></span>]</span>]</code></strong></span></dt>
<dd>
<p>
Resend NOTIFY messages for the zone.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>notrace</code></strong></span></dt>
<dd>
<p>
Sets the server's debugging level to 0.
</p>
<p>
See also <span class="command"><strong>rndc trace</strong></span>.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>nta
[<span class="optional">( -class <em class="replaceable"><code>class</code></em> | -dump | -force | -remove | -lifetime <em class="replaceable"><code>duration</code></em>)</span>]
<em class="replaceable"><code>domain</code></em>
[<span class="optional"><em class="replaceable"><code>view</code></em></span>]
</code></strong></span></dt>
<dd>
<p>
Sets a DNSSEC negative trust anchor (NTA)
for <code class="option">domain</code>, with a lifetime of
<code class="option">duration</code>. The default lifetime is
configured in <code class="filename">named.conf</code> via the
<code class="option">nta-lifetime</code> option, and defaults to
one hour. The lifetime cannot exceed one week.
</p>
<p>
A negative trust anchor selectively disables
DNSSEC validation for zones that are known to be
failing because of misconfiguration rather than
an attack. When data to be validated is
at or below an active NTA (and above any other
configured trust anchors), <span class="command"><strong>named</strong></span> will
abort the DNSSEC validation process and treat the data as
insecure rather than bogus. This continues until the
NTA's lifetime is elapsed.
</p>
<p>
NTAs persist across restarts of the <span class="command"><strong>named</strong></span> server.
The NTAs for a view are saved in a file called
<code class="filename"><em class="replaceable"><code>name</code></em>.nta</code>,
where <em class="replaceable"><code>name</code></em> is the
name of the view, or if it contains characters
that are incompatible with use as a file name, a
cryptographic hash generated from the name
of the view.
</p>
<p>
An existing NTA can be removed by using the
<code class="option">-remove</code> option.
</p>
<p>
An NTA's lifetime can be specified with the
<code class="option">-lifetime</code> option. TTL-style
suffixes can be used to specify the lifetime in
seconds, minutes, or hours. If the specified NTA
already exists, its lifetime will be updated to the
new value. Setting <code class="option">lifetime</code> to zero
is equivalent to <code class="option">-remove</code>.
</p>
<p>
If the <code class="option">-dump</code> is used, any other arguments
are ignored, and a list of existing NTAs is printed
(note that this may include NTAs that are expired but
have not yet been cleaned up).
</p>
<p>
Normally, <span class="command"><strong>named</strong></span> will periodically
test to see whether data below an NTA can now be
validated (see the <code class="option">nta-recheck</code> option
in the Administrator Reference Manual for details).
If data can be validated, then the NTA is regarded as
no longer necessary, and will be allowed to expire
early. The <code class="option">-force</code> overrides this
behavior and forces an NTA to persist for its entire
lifetime, regardless of whether data could be
validated if the NTA were not present.
</p>
<p>
The view class can be specified with <code class="option">-class</code>.
The default is class <strong class="userinput"><code>IN</code></strong>, which is
the only class for which DNSSEC is currently supported.
</p>
<p>
All of these options can be shortened, i.e., to
<code class="option">-l</code>, <code class="option">-r</code>, <code class="option">-d</code>,
<code class="option">-f</code>, and <code class="option">-c</code>.
</p>
<p>
Unrecognized options are treated as errors. To reference
a domain or view name that begins with a hyphen,
use a double-hyphen on the command line to indicate the
end of options.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>querylog</code></strong> [<span class="optional"> on | off </span>] </span></dt>
<dd>
<p>
Enable or disable query logging. (For backward
compatibility, this command can also be used without
an argument to toggle query logging on and off.)
</p>
<p>
Query logging can also be enabled
by explicitly directing the <span class="command"><strong>queries</strong></span>
<span class="command"><strong>category</strong></span> to a
<span class="command"><strong>channel</strong></span> in the
<span class="command"><strong>logging</strong></span> section of
<code class="filename">named.conf</code> or by specifying
<span class="command"><strong>querylog yes;</strong></span> in the
<span class="command"><strong>options</strong></span> section of
<code class="filename">named.conf</code>.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>reconfig</code></strong></span></dt>
<dd>
<p>
Reload the configuration file and load new zones,
but do not reload existing zone files even if they
have changed.
This is faster than a full <span class="command"><strong>reload</strong></span> when there
is a large number of zones because it avoids the need
to examine the
modification times of the zones files.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>recursing</code></strong></span></dt>
<dd>
<p>
Dump the list of queries <span class="command"><strong>named</strong></span> is currently
recursing on, and the list of domains to which iterative
queries are currently being sent. (The second list includes
the number of fetches currently active for the given domain,
and how many have been passed or dropped because of the
<code class="option">fetches-per-zone</code> option.)
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>refresh <em class="replaceable"><code>zone</code></em> [<span class="optional"><em class="replaceable"><code>class</code></em> [<span class="optional"><em class="replaceable"><code>view</code></em></span>]</span>]</code></strong></span></dt>
<dd>
<p>
Schedule zone maintenance for the given zone.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>reload</code></strong></span></dt>
<dd>
<p>
Reload configuration file and zones.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>reload <em class="replaceable"><code>zone</code></em> [<span class="optional"><em class="replaceable"><code>class</code></em> [<span class="optional"><em class="replaceable"><code>view</code></em></span>]</span>]</code></strong></span></dt>
<dd>
<p>
Reload the given zone.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>retransfer <em class="replaceable"><code>zone</code></em> [<span class="optional"><em class="replaceable"><code>class</code></em> [<span class="optional"><em class="replaceable"><code>view</code></em></span>]</span>]</code></strong></span></dt>
<dd>
<p>
Retransfer the given slave zone from the master server.
</p>
<p>
If the zone is configured to use
<span class="command"><strong>inline-signing</strong></span>, the signed
version of the zone is discarded; after the
retransfer of the unsigned version is complete, the
signed version will be regenerated with all new
signatures.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>scan</code></strong></span></dt>
<dd>
<p>
Scan the list of available network interfaces
for changes, without performing a full
<span class="command"><strong>reconfig</strong></span> or waiting for the
<span class="command"><strong>interface-interval</strong></span> timer.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>secroots [<span class="optional">-</span>] [<span class="optional"><em class="replaceable"><code>view ...</code></em></span>]</code></strong></span></dt>
<dd>
<p>
Dump the security roots (i.e., trust anchors
configured via <span class="command"><strong>trusted-keys</strong></span>,
<span class="command"><strong>managed-keys</strong></span>, or
<span class="command"><strong>dnssec-validation auto</strong></span>) and negative trust
anchors for the specified views. If no view is specified, all
views are dumped. Security roots will indicate whether
they are configured as trusted keys, managed keys, or
initializing managed keys (managed keys that have not yet
been updated by a successful key refresh query).
</p>
<p>
If the first argument is "-", then the output is
returned via the <span class="command"><strong>rndc</strong></span> response channel
and printed to the standard output.
Otherwise, it is written to the secroots dump file, which
defaults to <code class="filename">named.secroots</code>, but can be
overridden via the <code class="option">secroots-file</code> option in
<code class="filename">named.conf</code>.
</p>
<p>
See also <span class="command"><strong>rndc managed-keys</strong></span>.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>serve-stale ( on | off | reset | status ) [<span class="optional"><em class="replaceable"><code>class</code></em> [<span class="optional"><em class="replaceable"><code>view</code></em></span>]</span>]</code></strong></span></dt>
<dd>
<p>
Enable, disable, reset, or report the current status
of the serving of stale answers as configured in
<code class="filename">named.conf</code>.
</p>
<p>
If serving of stale answers is disabled by
<span class="command"><strong>rndc-serve-stale off</strong></span>, then it
will remain disabled even if <span class="command"><strong>named</strong></span>
is reloaded or reconfigured.
<span class="command"><strong>rndc serve-stale reset</strong></span> restores
the setting as configured in <code class="filename">named.conf</code>.
</p>
<p>
<span class="command"><strong>rndc serve-stale status</strong></span> will report
whether serving of stale answers is currently enabled,
disabled by the configuration, or disabled by
<span class="command"><strong>rndc</strong></span>. It will also report the
values of <span class="command"><strong>stale-answer-ttl</strong></span> and
<span class="command"><strong>max-stale-ttl</strong></span>.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>showzone <em class="replaceable"><code>zone</code></em> [<span class="optional"><em class="replaceable"><code>class</code></em> [<span class="optional"><em class="replaceable"><code>view</code></em></span>]</span>] </code></strong></span></dt>
<dd>
<p>
Print the configuration of a running zone.
</p>
<p>
See also <span class="command"><strong>rndc zonestatus</strong></span>.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>sign <em class="replaceable"><code>zone</code></em> [<span class="optional"><em class="replaceable"><code>class</code></em> [<span class="optional"><em class="replaceable"><code>view</code></em></span>]</span>]</code></strong></span></dt>
<dd>
<p>
Fetch all DNSSEC keys for the given zone
from the key directory (see the
<span class="command"><strong>key-directory</strong></span> option in
the BIND 9 Administrator Reference Manual). If they are within
their publication period, merge them into the
zone's DNSKEY RRset. If the DNSKEY RRset
is changed, then the zone is automatically
re-signed with the new key set.
</p>
<p>
This command requires that the
<span class="command"><strong>auto-dnssec</strong></span> zone option be set
to <code class="literal">allow</code> or
<code class="literal">maintain</code>,
and also requires the zone to be configured to
allow dynamic DNS.
(See "Dynamic Update Policies" in the Administrator
Reference Manual for more details.)
</p>
<p>
See also <span class="command"><strong>rndc loadkeys</strong></span>.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>signing [<span class="optional">( -list | -clear <em class="replaceable"><code>keyid/algorithm</code></em> | -clear <code class="literal">all</code> | -nsec3param ( <em class="replaceable"><code>parameters</code></em> | <code class="literal">none</code> ) | -serial <em class="replaceable"><code>value</code></em> ) </span>] <em class="replaceable"><code>zone</code></em> [<span class="optional"><em class="replaceable"><code>class</code></em> [<span class="optional"><em class="replaceable"><code>view</code></em></span>]</span>] </code></strong></span></dt>
<dd>
<p>
List, edit, or remove the DNSSEC signing state records
for the specified zone. The status of ongoing DNSSEC
operations (such as signing or generating
NSEC3 chains) is stored in the zone in the form
of DNS resource records of type
<span class="command"><strong>sig-signing-type</strong></span>.
<span class="command"><strong>rndc signing -list</strong></span> converts
these records into a human-readable form,
indicating which keys are currently signing
or have finished signing the zone, and which NSEC3
chains are being created or removed.
</p>
<p>
<span class="command"><strong>rndc signing -clear</strong></span> can remove
a single key (specified in the same format that
<span class="command"><strong>rndc signing -list</strong></span> uses to
display it), or all keys. In either case, only
completed keys are removed; any record indicating
that a key has not yet finished signing the zone
will be retained.
</p>
<p>
<span class="command"><strong>rndc signing -nsec3param</strong></span> sets
the NSEC3 parameters for a zone. This is the
only supported mechanism for using NSEC3 with
<span class="command"><strong>inline-signing</strong></span> zones.
Parameters are specified in the same format as
an NSEC3PARAM resource record: hash algorithm,
flags, iterations, and salt, in that order.
</p>
<p>
Currently, the only defined value for hash algorithm
is <code class="literal">1</code>, representing SHA-1.
The <code class="option">flags</code> may be set to
<code class="literal">0</code> or <code class="literal">1</code>,
depending on whether you wish to set the opt-out
bit in the NSEC3 chain. <code class="option">iterations</code>
defines the number of additional times to apply
the algorithm when generating an NSEC3 hash. The
<code class="option">salt</code> is a string of data expressed
in hexadecimal, a hyphen (`-') if no salt is
to be used, or the keyword <code class="literal">auto</code>,
which causes <span class="command"><strong>named</strong></span> to generate a
random 64-bit salt.
</p>
<p>
So, for example, to create an NSEC3 chain using
the SHA-1 hash algorithm, no opt-out flag,
10 iterations, and a salt value of "FFFF", use:
<span class="command"><strong>rndc signing -nsec3param 1 0 10 FFFF <em class="replaceable"><code>zone</code></em></strong></span>.
To set the opt-out flag, 15 iterations, and no
salt, use:
<span class="command"><strong>rndc signing -nsec3param 1 1 15 - <em class="replaceable"><code>zone</code></em></strong></span>.
</p>
<p>
<span class="command"><strong>rndc signing -nsec3param none</strong></span>
removes an existing NSEC3 chain and replaces it
with NSEC.
</p>
<p>
<span class="command"><strong>rndc signing -serial value</strong></span> sets
the serial number of the zone to value. If the value
would cause the serial number to go backwards it will
be rejected. The primary use is to set the serial on
inline signed zones.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>stats</code></strong></span></dt>
<dd>
<p>
Write server statistics to the statistics file.
(See the <span class="command"><strong>statistics-file</strong></span> option in
the BIND 9 Administrator Reference Manual.)
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>status</code></strong></span></dt>
<dd>
<p>
Display status of the server.
Note that the number of zones includes the internal <span class="command"><strong>bind/CH</strong></span> zone
and the default <span class="command"><strong>./IN</strong></span>
hint zone if there is not an
explicit root zone configured.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>stop [<span class="optional">-p</span>]</code></strong></span></dt>
<dd>
<p>
Stop the server, making sure any recent changes
made through dynamic update or IXFR are first saved to
the master files of the updated zones.
If <code class="option">-p</code> is specified <span class="command"><strong>named</strong></span>'s process id is returned.
This allows an external process to determine when <span class="command"><strong>named</strong></span>
had completed stopping.
</p>
<p>See also <span class="command"><strong>rndc halt</strong></span>.</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>sync [<span class="optional">-clean</span>] [<span class="optional"><em class="replaceable"><code>zone</code></em> [<span class="optional"><em class="replaceable"><code>class</code></em> [<span class="optional"><em class="replaceable"><code>view</code></em></span>]</span>]</span>]</code></strong></span></dt>
<dd>
<p>
Sync changes in the journal file for a dynamic zone
to the master file. If the "-clean" option is
specified, the journal file is also removed. If
no zone is specified, then all zones are synced.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>tcp-timeouts [<span class="optional"><em class="replaceable"><code>initial</code></em> <em class="replaceable"><code>idle</code></em> <em class="replaceable"><code>keepalive</code></em> <em class="replaceable"><code>advertised</code></em></span>]</code></strong></span></dt>
<dd>
<p>
When called without arguments, display the current
values of the <span class="command"><strong>tcp-initial-timeout</strong></span>,
<span class="command"><strong>tcp-idle-timeout</strong></span>,
<span class="command"><strong>tcp-keepalive-timeout</strong></span> and
<span class="command"><strong>tcp-advertised-timeout</strong></span> options.
When called with arguments, update these values. This
allows an administrator to make rapid adjustments when
under a denial of service attack. See the descriptions of
these options in the BIND 9 Administrator Reference Manual
for details of their use.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>thaw [<span class="optional"><em class="replaceable"><code>zone</code></em> [<span class="optional"><em class="replaceable"><code>class</code></em> [<span class="optional"><em class="replaceable"><code>view</code></em></span>]</span>]</span>]</code></strong></span></dt>
<dd>
<p>
Enable updates to a frozen dynamic zone. If no
zone is specified, then all frozen zones are
enabled. This causes the server to reload the zone
from disk, and re-enables dynamic updates after the
load has completed. After a zone is thawed,
dynamic updates will no longer be refused. If
the zone has changed and the
<span class="command"><strong>ixfr-from-differences</strong></span> option is
in use, then the journal file will be updated to
reflect changes in the zone. Otherwise, if the
zone has changed, any existing journal file will be
removed.
</p>
<p>See also <span class="command"><strong>rndc freeze</strong></span>.</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>trace</code></strong></span></dt>
<dd>
<p>
Increment the servers debugging level by one.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>trace <em class="replaceable"><code>level</code></em></code></strong></span></dt>
<dd>
<p>
Sets the server's debugging level to an explicit
value.
</p>
<p>
See also <span class="command"><strong>rndc notrace</strong></span>.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>tsig-delete</code></strong> <em class="replaceable"><code>keyname</code></em> [<span class="optional"><em class="replaceable"><code>view</code></em></span>]</span></dt>
<dd>
<p>
Delete a given TKEY-negotiated key from the server.
(This does not apply to statically configured TSIG
keys.)
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>tsig-list</code></strong></span></dt>
<dd>
<p>
List the names of all TSIG keys currently configured
for use by <span class="command"><strong>named</strong></span> in each view. The
list includes both statically configured keys and dynamic
TKEY-negotiated keys.
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>validation ( on | off | status ) [<span class="optional"><em class="replaceable"><code>view ...</code></em></span>] </code></strong></span></dt>
<dd>
<p>
Enable, disable, or check the current status of
DNSSEC validation. By default, validation is enabled.
(Note that <span class="command"><strong>dnssec-enable</strong></span> must also be
<strong class="userinput"><code>yes</code></strong> (the default value) for signatures
to be returned along with validated data. If validation is
enabled while <span class="command"><strong>dnssec-enable</strong></span> is set to
<strong class="userinput"><code>no</code></strong>, the server will validate internally,
but will not supply clients with the necessary records to allow
validity to be confirmed.)
</p>
</dd>
<dt><span class="term"><strong class="userinput"><code>zonestatus <em class="replaceable"><code>zone</code></em> [<span class="optional"><em class="replaceable"><code>class</code></em> [<span class="optional"><em class="replaceable"><code>view</code></em></span>]</span>]</code></strong></span></dt>
<dd>
<p>
Displays the current status of the given zone,
including the master file name and any include
files from which it was loaded, when it was most
recently loaded, the current serial number, the
number of nodes, whether the zone supports
dynamic updates, whether the zone is DNSSEC
signed, whether it uses automatic DNSSEC key
management or inline signing, and the scheduled
refresh or expiry times for the zone.
</p>
<p>
See also <span class="command"><strong>rndc showzone</strong></span>.
</p>
</dd>
</dl></div>
<p>
<span class="command"><strong>rndc</strong></span> commands that specify zone names,
such as <span class="command"><strong>reload</strong></span>, <span class="command"><strong>retransfer</strong></span>
or <span class="command"><strong>zonestatus</strong></span>, can be ambiguous when applied
to zones of type <code class="option">redirect</code>. Redirect zones are
always called ".", and can be confused with zones of type
<code class="option">hint</code> or with slaved copies of the root zone.
To specify a redirect zone, use the special zone name
<strong class="userinput"><code>-redirect</code></strong>, without a trailing period.
(With a trailing period, this would specify a zone called
"-redirect".)
</p>
</div>
<div class="refsection">
<a name="id-1.13.38.10"></a><h2>LIMITATIONS</h2>
<p>
There is currently no way to provide the shared secret for a
<code class="option">key_id</code> without using the configuration file.
</p>
<p>
Several error messages could be clearer.
</p>
</div>
<div class="refsection">
<a name="id-1.13.38.11"></a><h2>SEE ALSO</h2>
<p><span class="citerefentry">
<span class="refentrytitle">rndc.conf</span>(5)
</span>,
<span class="citerefentry">
<span class="refentrytitle">rndc-confgen</span>(8)
</span>,
<span class="citerefentry">
<span class="refentrytitle">named</span>(8)
</span>,
<span class="citerefentry">
<span class="refentrytitle">named.conf</span>(5)
</span>,
<span class="citerefentry">
<span class="refentrytitle">ndc</span>(8)
</span>,
<em class="citetitle">BIND 9 Administrator Reference Manual</em>.
</p>
</div>
</div>
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