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d2ec54f7875f7e05edd56195adbeb593c947763fphitran<tr><th colspan="3" align="center"><code class="filename">rndc.conf</code></th></tr>
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18c2aff776a775d34a4c9893a4c72e0434d68e36artem<div class="refentry" lang="en">
18c2aff776a775d34a4c9893a4c72e0434d68e36artem<a name="man.rndc.conf"></a><div class="titlepage"></div>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem<div class="refnamediv">
18c2aff776a775d34a4c9893a4c72e0434d68e36artem<h2>Name</h2>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem<p><code class="filename">rndc.conf</code> &#8212; rndc configuration file</p>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem</div>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem<div class="refsynopsisdiv">
a9da3307db733eb1739ba859952610bba3d894abnp<h2>Synopsis</h2>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem<div class="cmdsynopsis"><p><code class="command">rndc.conf</code> </p></div>
eade8b27e8185317f75d0a41e3a1b0d620d3e99cnp</div>
eade8b27e8185317f75d0a41e3a1b0d620d3e99cnp<div class="refsect1" lang="en">
18c2aff776a775d34a4c9893a4c72e0434d68e36artem<a name="id2663913"></a><h2>DESCRIPTION</h2>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem<p><code class="filename">rndc.conf</code> is the configuration file
18c2aff776a775d34a4c9893a4c72e0434d68e36artem for <span><strong class="command">rndc</strong></span>, the BIND 9 name server control
d2ec54f7875f7e05edd56195adbeb593c947763fphitran utility. This file has a similar structure and syntax to
b6805bf78d2bbbeeaea8909a05623587b42d58b3Gordon Ross <code class="filename">named.conf</code>. Statements are enclosed
18c2aff776a775d34a4c9893a4c72e0434d68e36artem in braces and terminated with a semi-colon. Clauses in
18c2aff776a775d34a4c9893a4c72e0434d68e36artem the statements are also semi-colon terminated. The usual
18c2aff776a775d34a4c9893a4c72e0434d68e36artem comment styles are supported:
18c2aff776a775d34a4c9893a4c72e0434d68e36artem </p>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem<p>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem C style: /* */
18c2aff776a775d34a4c9893a4c72e0434d68e36artem </p>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem<p>
d2ec54f7875f7e05edd56195adbeb593c947763fphitran C++ style: // to end of line
d2ec54f7875f7e05edd56195adbeb593c947763fphitran </p>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem<p>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem Unix style: # to end of line
18c2aff776a775d34a4c9893a4c72e0434d68e36artem </p>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem<p><code class="filename">rndc.conf</code> is much simpler than
18c2aff776a775d34a4c9893a4c72e0434d68e36artem <code class="filename">named.conf</code>. The file uses three
18c2aff776a775d34a4c9893a4c72e0434d68e36artem statements: an options statement, a server statement
18c2aff776a775d34a4c9893a4c72e0434d68e36artem and a key statement.
18c2aff776a775d34a4c9893a4c72e0434d68e36artem </p>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem<p>
d2ec54f7875f7e05edd56195adbeb593c947763fphitran The <code class="option">options</code> statement contains five clauses.
d2ec54f7875f7e05edd56195adbeb593c947763fphitran The <code class="option">default-server</code> clause is followed by the
18c2aff776a775d34a4c9893a4c72e0434d68e36artem name or address of a name server. This host will be used when
18c2aff776a775d34a4c9893a4c72e0434d68e36artem no name server is given as an argument to
d2ec54f7875f7e05edd56195adbeb593c947763fphitran <span><strong class="command">rndc</strong></span>. The <code class="option">default-key</code>
d2ec54f7875f7e05edd56195adbeb593c947763fphitran clause is followed by the name of a key which is identified by
d2ec54f7875f7e05edd56195adbeb593c947763fphitran a <code class="option">key</code> statement. If no
d2ec54f7875f7e05edd56195adbeb593c947763fphitran <code class="option">keyid</code> is provided on the rndc command line,
d2ec54f7875f7e05edd56195adbeb593c947763fphitran and no <code class="option">key</code> clause is found in a matching
d2ec54f7875f7e05edd56195adbeb593c947763fphitran <code class="option">server</code> statement, this default key will be
d2ec54f7875f7e05edd56195adbeb593c947763fphitran used to authenticate the server's commands and responses. The
d2ec54f7875f7e05edd56195adbeb593c947763fphitran <code class="option">default-port</code> clause is followed by the port
18c2aff776a775d34a4c9893a4c72e0434d68e36artem to connect to on the remote name server. If no
18c2aff776a775d34a4c9893a4c72e0434d68e36artem <code class="option">port</code> option is provided on the rndc command
18c2aff776a775d34a4c9893a4c72e0434d68e36artem line, and no <code class="option">port</code> clause is found in a
d2ec54f7875f7e05edd56195adbeb593c947763fphitran matching <code class="option">server</code> statement, this default port
18c2aff776a775d34a4c9893a4c72e0434d68e36artem will be used to connect.
a9da3307db733eb1739ba859952610bba3d894abnp The <code class="option">default-source-address</code> and
a9da3307db733eb1739ba859952610bba3d894abnp <code class="option">default-source-address-v6</code> clauses which
a9da3307db733eb1739ba859952610bba3d894abnp can be used to set the IPv4 and IPv6 source addresses
a9da3307db733eb1739ba859952610bba3d894abnp respectively.
a9da3307db733eb1739ba859952610bba3d894abnp </p>
a9da3307db733eb1739ba859952610bba3d894abnp<p>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem After the <code class="option">server</code> keyword, the server
18c2aff776a775d34a4c9893a4c72e0434d68e36artem statement includes a string which is the hostname or address
18c2aff776a775d34a4c9893a4c72e0434d68e36artem for a name server. The statement has three possible clauses:
18c2aff776a775d34a4c9893a4c72e0434d68e36artem <code class="option">key</code>, <code class="option">port</code> and
18c2aff776a775d34a4c9893a4c72e0434d68e36artem <code class="option">addresses</code>. The key name must match the
18c2aff776a775d34a4c9893a4c72e0434d68e36artem name of a key statement in the file. The port number
18c2aff776a775d34a4c9893a4c72e0434d68e36artem specifies the port to connect to. If an <code class="option">addresses</code>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem clause is supplied these addresses will be used instead of
18c2aff776a775d34a4c9893a4c72e0434d68e36artem the server name. Each address can take an optional port.
18c2aff776a775d34a4c9893a4c72e0434d68e36artem If an <code class="option">source-address</code> or <code class="option">source-address-v6</code>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem of supplied then these will be used to specify the IPv4 and IPv6
18c2aff776a775d34a4c9893a4c72e0434d68e36artem source addresses respectively.
18c2aff776a775d34a4c9893a4c72e0434d68e36artem </p>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem<p>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem The <code class="option">key</code> statement begins with an identifying
18c2aff776a775d34a4c9893a4c72e0434d68e36artem string, the name of the key. The statement has two clauses.
18c2aff776a775d34a4c9893a4c72e0434d68e36artem <code class="option">algorithm</code> identifies the authentication algorithm
18c2aff776a775d34a4c9893a4c72e0434d68e36artem for <span><strong class="command">rndc</strong></span> to use; currently only HMAC-MD5
18c2aff776a775d34a4c9893a4c72e0434d68e36artem (for compatibility), HMAC-SHA1, HMAC-SHA224, HMAC-SHA256
18c2aff776a775d34a4c9893a4c72e0434d68e36artem (default), HMAC-SHA384 and HMAC-SHA512 are
18c2aff776a775d34a4c9893a4c72e0434d68e36artem supported. This is followed by a secret clause which contains
18c2aff776a775d34a4c9893a4c72e0434d68e36artem the base-64 encoding of the algorithm's authentication key. The
18c2aff776a775d34a4c9893a4c72e0434d68e36artem base-64 string is enclosed in double quotes.
18c2aff776a775d34a4c9893a4c72e0434d68e36artem </p>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem<p>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem There are two common ways to generate the base-64 string for the
18c2aff776a775d34a4c9893a4c72e0434d68e36artem secret. The BIND 9 program <span><strong class="command">rndc-confgen</strong></span>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem can
18c2aff776a775d34a4c9893a4c72e0434d68e36artem be used to generate a random key, or the
18c2aff776a775d34a4c9893a4c72e0434d68e36artem <span><strong class="command">mmencode</strong></span> program, also known as
18c2aff776a775d34a4c9893a4c72e0434d68e36artem <span><strong class="command">mimencode</strong></span>, can be used to generate a
18c2aff776a775d34a4c9893a4c72e0434d68e36artem base-64
18c2aff776a775d34a4c9893a4c72e0434d68e36artem string from known input. <span><strong class="command">mmencode</strong></span> does
18c2aff776a775d34a4c9893a4c72e0434d68e36artem not
18c2aff776a775d34a4c9893a4c72e0434d68e36artem ship with BIND 9 but is available on many systems. See the
18c2aff776a775d34a4c9893a4c72e0434d68e36artem EXAMPLE section for sample command lines for each.
18c2aff776a775d34a4c9893a4c72e0434d68e36artem </p>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem</div>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem<div class="refsect1" lang="en">
18c2aff776a775d34a4c9893a4c72e0434d68e36artem<a name="id2664085"></a><h2>EXAMPLE</h2>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem<pre class="programlisting">
18c2aff776a775d34a4c9893a4c72e0434d68e36artem options {
18c2aff776a775d34a4c9893a4c72e0434d68e36artem default-server localhost;
18c2aff776a775d34a4c9893a4c72e0434d68e36artem default-key samplekey;
18c2aff776a775d34a4c9893a4c72e0434d68e36artem };
18c2aff776a775d34a4c9893a4c72e0434d68e36artem</pre>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem<p>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem </p>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem<pre class="programlisting">
18c2aff776a775d34a4c9893a4c72e0434d68e36artem server localhost {
18c2aff776a775d34a4c9893a4c72e0434d68e36artem key samplekey;
18c2aff776a775d34a4c9893a4c72e0434d68e36artem };
18c2aff776a775d34a4c9893a4c72e0434d68e36artem</pre>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem<p>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem </p>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem<pre class="programlisting">
18c2aff776a775d34a4c9893a4c72e0434d68e36artem server testserver {
18c2aff776a775d34a4c9893a4c72e0434d68e36artem key testkey;
18c2aff776a775d34a4c9893a4c72e0434d68e36artem addresses { localhost port 5353; };
18c2aff776a775d34a4c9893a4c72e0434d68e36artem };
d2ec54f7875f7e05edd56195adbeb593c947763fphitran</pre>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem<p>
d2ec54f7875f7e05edd56195adbeb593c947763fphitran </p>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem<pre class="programlisting">
18c2aff776a775d34a4c9893a4c72e0434d68e36artem key samplekey {
d2ec54f7875f7e05edd56195adbeb593c947763fphitran algorithm hmac-sha256;
d2ec54f7875f7e05edd56195adbeb593c947763fphitran secret "6FMfj43Osz4lyb24OIe2iGEz9lf1llJO+lz";
d2ec54f7875f7e05edd56195adbeb593c947763fphitran };
d2ec54f7875f7e05edd56195adbeb593c947763fphitran</pre>
d2ec54f7875f7e05edd56195adbeb593c947763fphitran<p>
18c2aff776a775d34a4c9893a4c72e0434d68e36artem </p>
<pre class="programlisting">
key testkey {
algorithm hmac-sha256;
secret "R3HI8P6BKw9ZwXwN3VZKuQ==";
};
</pre>
<p>
</p>
<p>
In the above example, <span><strong class="command">rndc</strong></span> will by
default use
the server at localhost (127.0.0.1) and the key called samplekey.
Commands to the localhost server will use the samplekey key, which
must also be defined in the server's configuration file with the
same name and secret. The key statement indicates that samplekey
uses the HMAC-SHA256 algorithm and its secret clause contains the
base-64 encoding of the HMAC-SHA256 secret enclosed in double quotes.
</p>
<p>
If <span><strong class="command">rndc -s testserver</strong></span> is used then <span><strong class="command">rndc</strong></span> will
connect to server on localhost port 5353 using the key testkey.
</p>
<p>
To generate a random secret with <span><strong class="command">rndc-confgen</strong></span>:
</p>
<p><strong class="userinput"><code>rndc-confgen</code></strong>
</p>
<p>
A complete <code class="filename">rndc.conf</code> file, including
the
randomly generated key, will be written to the standard
output. Commented-out <code class="option">key</code> and
<code class="option">controls</code> statements for
<code class="filename">named.conf</code> are also printed.
</p>
<p>
To generate a base-64 secret with <span><strong class="command">mmencode</strong></span>:
</p>
<p><strong class="userinput"><code>echo "known plaintext for a secret" | mmencode</code></strong>
</p>
</div>
<div class="refsect1" lang="en">
<a name="id2664821"></a><h2>NAME SERVER CONFIGURATION</h2>
<p>
The name server must be configured to accept rndc connections and
to recognize the key specified in the <code class="filename">rndc.conf</code>
file, using the controls statement in <code class="filename">named.conf</code>.
See the sections on the <code class="option">controls</code> statement in the
BIND 9 Administrator Reference Manual for details.
</p>
</div>
<div class="refsect1" lang="en">
<a name="id2664846"></a><h2>SEE ALSO</h2>
<p><span class="citerefentry"><span class="refentrytitle">rndc</span>(8)</span>,
<span class="citerefentry"><span class="refentrytitle">rndc-confgen</span>(8)</span>,
<span class="citerefentry"><span class="refentrytitle">mmencode</span>(1)</span>,
<em class="citetitle">BIND 9 Administrator Reference Manual</em>.
</p>
</div>
<div class="refsect1" lang="en">
<a name="id2664885"></a><h2>AUTHOR</h2>
<p><span class="corpauthor">Internet Systems Consortium</span>
</p>
</div>
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