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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <!-- - Copyright (C) 2000-2021 Internet Systems Consortium, Inc. ("ISC") - - This Source Code Form is subject to the terms of the Mozilla Public - License, v. 2.0. If a copy of the MPL was not distributed with this - file, You can obtain one at http://mozilla.org/MPL/2.0/. --> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>rndc.conf</title> <meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> <link rel="home" href="Bv9ARM.html" title="BIND 9 Administrator Reference Manual"> <link rel="up" href="Bv9ARM.ch13.html" title="Manual pages"> <link rel="prev" href="man.rndc-confgen.html" title="rndc-confgen"> <link rel="next" href="man.rndc.html" title="rndc"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr><th colspan="3" align="center"><code class="filename">rndc.conf</code></th></tr> <tr> <td width="20%" align="left"> <a accesskey="p" href="man.rndc-confgen.html">Prev</a>�</td> <th width="60%" align="center">Manual pages</th> <td width="20%" align="right">�<a accesskey="n" href="man.rndc.html">Next</a> </td> </tr> </table> <hr> </div> <div class="refentry"> <a name="man.rndc.conf"></a><div class="titlepage"></div> <div class="refnamediv"> <h2>Name</h2> <p><code class="filename">rndc.conf</code> &#8212; rndc configuration file</p> </div> <div class="refsynopsisdiv"> <h2>Synopsis</h2> <div class="cmdsynopsis"><p><code class="command">rndc.conf</code> </p></div> </div> <div class="refsection"> <a name="id-1.14.38.7"></a><h2>DESCRIPTION</h2> <p><code class="filename">rndc.conf</code> is the configuration file for <span class="command"><strong>rndc</strong></span>, the BIND 9 name server control utility. This file has a similar structure and syntax to <code class="filename">named.conf</code>. Statements are enclosed in braces and terminated with a semi-colon. Clauses in the statements are also semi-colon terminated. The usual comment styles are supported: </p> <p> C style: /* */ </p> <p> C++ style: // to end of line </p> <p> Unix style: # to end of line </p> <p><code class="filename">rndc.conf</code> is much simpler than <code class="filename">named.conf</code>. The file uses three statements: an options statement, a server statement and a key statement. </p> <p> The <code class="option">options</code> statement contains five clauses. The <code class="option">default-server</code> clause is followed by the name or address of a name server. This host will be used when no name server is given as an argument to <span class="command"><strong>rndc</strong></span>. The <code class="option">default-key</code> clause is followed by the name of a key which is identified by a <code class="option">key</code> statement. If no <code class="option">keyid</code> is provided on the rndc command line, and no <code class="option">key</code> clause is found in a matching <code class="option">server</code> statement, this default key will be used to authenticate the server's commands and responses. The <code class="option">default-port</code> clause is followed by the port to connect to on the remote name server. If no <code class="option">port</code> option is provided on the rndc command line, and no <code class="option">port</code> clause is found in a matching <code class="option">server</code> statement, this default port will be used to connect. The <code class="option">default-source-address</code> and <code class="option">default-source-address-v6</code> clauses which can be used to set the IPv4 and IPv6 source addresses respectively. </p> <p> After the <code class="option">server</code> keyword, the server statement includes a string which is the hostname or address for a name server. The statement has three possible clauses: <code class="option">key</code>, <code class="option">port</code> and <code class="option">addresses</code>. The key name must match the name of a key statement in the file. The port number specifies the port to connect to. If an <code class="option">addresses</code> clause is supplied these addresses will be used instead of the server name. Each address can take an optional port. If an <code class="option">source-address</code> or <code class="option">source-address-v6</code> of supplied then these will be used to specify the IPv4 and IPv6 source addresses respectively. </p> <p> The <code class="option">key</code> statement begins with an identifying string, the name of the key. The statement has two clauses. <code class="option">algorithm</code> identifies the authentication algorithm for <span class="command"><strong>rndc</strong></span> to use; currently only HMAC-MD5 (for compatibility), HMAC-SHA1, HMAC-SHA224, HMAC-SHA256 (default), HMAC-SHA384 and HMAC-SHA512 are supported. This is followed by a secret clause which contains the base-64 encoding of the algorithm's authentication key. The base-64 string is enclosed in double quotes. </p> <p> There are two common ways to generate the base-64 string for the secret. The BIND 9 program <span class="command"><strong>rndc-confgen</strong></span> can be used to generate a random key, or the <span class="command"><strong>mmencode</strong></span> program, also known as <span class="command"><strong>mimencode</strong></span>, can be used to generate a base-64 string from known input. <span class="command"><strong>mmencode</strong></span> does not ship with BIND 9 but is available on many systems. See the EXAMPLE section for sample command lines for each. </p> </div> <div class="refsection"> <a name="id-1.14.38.8"></a><h2>EXAMPLE</h2> <pre class="programlisting"> options { default-server localhost; default-key samplekey; }; </pre> <p> </p> <pre class="programlisting"> server localhost { key samplekey; }; </pre> <p> </p> <pre class="programlisting"> server testserver { key testkey; addresses { localhost port 5353; }; }; </pre> <p> </p> <pre class="programlisting"> key samplekey { algorithm hmac-sha256; secret "6FMfj43Osz4lyb24OIe2iGEz9lf1llJO+lz"; }; </pre> <p> </p> <pre class="programlisting"> key testkey { algorithm hmac-sha256; secret "R3HI8P6BKw9ZwXwN3VZKuQ=="; }; </pre> <p> </p> <p> In the above example, <span class="command"><strong>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 class="command"><strong>rndc -s testserver</strong></span> is used then <span class="command"><strong>rndc</strong></span> will connect to server on localhost port 5353 using the key testkey. </p> <p> To generate a random secret with <span class="command"><strong>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 class="command"><strong>mmencode</strong></span>: </p> <p><strong class="userinput"><code>echo "known plaintext for a secret" | mmencode</code></strong> </p> </div> <div class="refsection"> <a name="id-1.14.38.9"></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="refsection"> <a name="id-1.14.38.10"></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> <div class="navfooter"> <hr> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"> <a accesskey="p" href="man.rndc-confgen.html">Prev</a>�</td> <td width="20%" align="center"><a accesskey="u" href="Bv9ARM.ch13.html">Up</a></td> <td width="40%" align="right">�<a accesskey="n" href="man.rndc.html">Next</a> </td> </tr> <tr> <td width="40%" align="left" valign="top"> <span class="application">rndc-confgen</span>�</td> <td width="20%" align="center"><a accesskey="h" href="Bv9ARM.html">Home</a></td> <td width="40%" align="right" valign="top">�<span class="application">rndc</span> </td> </tr> </table> </div> <p xmlns:db="http://docbook.org/ns/docbook" style="text-align: center;">BIND 9.11.36 (Extended Support Version)</p> </body> </html>
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