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<div class="refentry">
<a name="man.rndc-confgen"></a><div class="titlepage"></div>
<div class="refnamediv">
<h2>Name</h2>
<p><span class="application">rndc-confgen</span> — rndc key generation tool</p>
</div>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<div class="cmdsynopsis"><p><code class="command">rndc-confgen</code> [<code class="option">-a</code>] [<code class="option">-A <em class="replaceable"><code>algorithm</code></em></code>] [<code class="option">-b <em class="replaceable"><code>keysize</code></em></code>] [<code class="option">-c <em class="replaceable"><code>keyfile</code></em></code>] [<code class="option">-h</code>] [<code class="option">-k <em class="replaceable"><code>keyname</code></em></code>] [<code class="option">-p <em class="replaceable"><code>port</code></em></code>] [<code class="option">-r <em class="replaceable"><code>randomfile</code></em></code>] [<code class="option">-s <em class="replaceable"><code>address</code></em></code>] [<code class="option">-t <em class="replaceable"><code>chrootdir</code></em></code>] [<code class="option">-u <em class="replaceable"><code>user</code></em></code>]</p></div>
</div>
<div class="refsection">
<a name="id-1.14.37.7"></a><h2>DESCRIPTION</h2>
<p><span class="command"><strong>rndc-confgen</strong></span>
generates configuration files
for <span class="command"><strong>rndc</strong></span>. It can be used as a
convenient alternative to writing the
<code class="filename">rndc.conf</code> file
and the corresponding <span class="command"><strong>controls</strong></span>
and <span class="command"><strong>key</strong></span>
statements in <code class="filename">named.conf</code> by hand.
Alternatively, it can be run with the <span class="command"><strong>-a</strong></span>
option to set up a <code class="filename">rndc.key</code> file and
avoid the need for a <code class="filename">rndc.conf</code> file
and a <span class="command"><strong>controls</strong></span> statement altogether.
</p>
</div>
<div class="refsection">
<a name="id-1.14.37.8"></a><h2>OPTIONS</h2>
<div class="variablelist"><dl class="variablelist">
<dt><span class="term">-a</span></dt>
<dd>
<p>
Do automatic <span class="command"><strong>rndc</strong></span> configuration.
This creates a file <code class="filename">rndc.key</code>
in <code class="filename">/etc</code> (or whatever
<code class="varname">sysconfdir</code>
was specified as when <acronym class="acronym">BIND</acronym> was
built)
that is read by both <span class="command"><strong>rndc</strong></span>
and <span class="command"><strong>named</strong></span> on startup. The
<code class="filename">rndc.key</code> file defines a default
command channel and authentication key allowing
<span class="command"><strong>rndc</strong></span> to communicate with
<span class="command"><strong>named</strong></span> on the local host
with no further configuration.
</p>
<p>
Running <span class="command"><strong>rndc-confgen -a</strong></span> allows
BIND 9 and <span class="command"><strong>rndc</strong></span> to be used as
drop-in
replacements for BIND 8 and <span class="command"><strong>ndc</strong></span>,
with no changes to the existing BIND 8
<code class="filename">named.conf</code> file.
</p>
<p>
If a more elaborate configuration than that
generated by <span class="command"><strong>rndc-confgen -a</strong></span>
is required, for example if rndc is to be used remotely,
you should run <span class="command"><strong>rndc-confgen</strong></span> without
the
<span class="command"><strong>-a</strong></span> option and set up a
<code class="filename">rndc.conf</code> and
<code class="filename">named.conf</code>
as directed.
</p>
</dd>
<dt><span class="term">-A <em class="replaceable"><code>algorithm</code></em></span></dt>
<dd><p>
Specifies the algorithm to use for the TSIG key. Available
choices are: hmac-md5, hmac-sha1, hmac-sha224, hmac-sha256,
hmac-sha384 and hmac-sha512. The default is hmac-md5 or
if MD5 was disabled hmac-sha256.
</p></dd>
<dt><span class="term">-b <em class="replaceable"><code>keysize</code></em></span></dt>
<dd><p>
Specifies the size of the authentication key in bits.
Must be between 1 and 512 bits; the default is the
hash size.
</p></dd>
<dt><span class="term">-c <em class="replaceable"><code>keyfile</code></em></span></dt>
<dd><p>
Used with the <span class="command"><strong>-a</strong></span> option to specify
an alternate location for <code class="filename">rndc.key</code>.
</p></dd>
<dt><span class="term">-h</span></dt>
<dd><p>
Prints a short summary of the options and arguments to
<span class="command"><strong>rndc-confgen</strong></span>.
</p></dd>
<dt><span class="term">-k <em class="replaceable"><code>keyname</code></em></span></dt>
<dd><p>
Specifies the key name of the rndc authentication key.
This must be a valid domain name.
The default is <code class="constant">rndc-key</code>.
</p></dd>
<dt><span class="term">-p <em class="replaceable"><code>port</code></em></span></dt>
<dd><p>
Specifies the command channel port where <span class="command"><strong>named</strong></span>
listens for connections from <span class="command"><strong>rndc</strong></span>.
The default is 953.
</p></dd>
<dt><span class="term">-r <em class="replaceable"><code>randomfile</code></em></span></dt>
<dd><p>
Specifies a source of random data for generating the
authorization. If the operating
system does not provide a <code class="filename">/dev/random</code>
or equivalent device, the default source of randomness
is keyboard input. <code class="filename">randomdev</code>
specifies
the name of a character device or file containing random
data to be used instead of the default. The special value
<code class="filename">keyboard</code> indicates that keyboard
input should be used.
</p></dd>
<dt><span class="term">-s <em class="replaceable"><code>address</code></em></span></dt>
<dd><p>
Specifies the IP address where <span class="command"><strong>named</strong></span>
listens for command channel connections from
<span class="command"><strong>rndc</strong></span>. The default is the loopback
address 127.0.0.1.
</p></dd>
<dt><span class="term">-t <em class="replaceable"><code>chrootdir</code></em></span></dt>
<dd><p>
Used with the <span class="command"><strong>-a</strong></span> option to specify
a directory where <span class="command"><strong>named</strong></span> will run
chrooted. An additional copy of the <code class="filename">rndc.key</code>
will be written relative to this directory so that
it will be found by the chrooted <span class="command"><strong>named</strong></span>.
</p></dd>
<dt><span class="term">-u <em class="replaceable"><code>user</code></em></span></dt>
<dd><p>
Used with the <span class="command"><strong>-a</strong></span> option to set the
owner
of the <code class="filename">rndc.key</code> file generated.
If
<span class="command"><strong>-t</strong></span> is also specified only the file
in
the chroot area has its owner changed.
</p></dd>
</dl></div>
</div>
<div class="refsection">
<a name="id-1.14.37.9"></a><h2>EXAMPLES</h2>
<p>
To allow <span class="command"><strong>rndc</strong></span> to be used with
no manual configuration, run
</p>
<p><strong class="userinput"><code>rndc-confgen -a</code></strong>
</p>
<p>
To print a sample <code class="filename">rndc.conf</code> file and
corresponding <span class="command"><strong>controls</strong></span> and <span class="command"><strong>key</strong></span>
statements to be manually inserted into <code class="filename">named.conf</code>,
run
</p>
<p><strong class="userinput"><code>rndc-confgen</code></strong>
</p>
</div>
<div class="refsection">
<a name="id-1.14.37.10"></a><h2>SEE ALSO</h2>
<p><span class="citerefentry"><span class="refentrytitle">rndc</span>(8)</span>,
<span class="citerefentry"><span class="refentrytitle">rndc.conf</span>(5)</span>,
<span class="citerefentry"><span class="refentrytitle">named</span>(8)</span>,
<em class="citetitle">BIND 9 Administrator Reference Manual</em>.
</p>
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