Adding upstream version 1:9.11.5.P4+dfsg.upstream/1%9.11.5.P4+dfsg upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
author: Daniel Baumann <daniel.baumann@progress-linux.org> 2024-05-05 18:37:14 +0000
committer: Daniel Baumann <daniel.baumann@progress-linux.org> 2024-05-05 18:37:14 +0000
commit: ea648e70a989cca190cd7403fe892fd2dcc290b4 (patch)
tree: e2b6b1c647da68b0d4d66082835e256eb30970e8 /doc/arm/Bv9ARM.ch05.html
parent: Initial commit. (diff)
download: bind9-ea648e70a989cca190cd7403fe892fd2dcc290b4.tar.xz
bind9-ea648e70a989cca190cd7403fe892fd2dcc290b4.zip
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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<!--
+ - Copyright (C) 2000-2019 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>Chapter 5. The BIND 9 Lightweight Resolver</title>
+<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
+<link rel="home" href="Bv9ARM.html" title="BIND 9 Administrator Reference Manual">
+<link rel="up" href="Bv9ARM.html" title="BIND 9 Administrator Reference Manual">
+<link rel="prev" href="Bv9ARM.ch04.html" title="Chapter 4. Advanced DNS Features">
+<link rel="next" href="Bv9ARM.ch06.html" title="Chapter 6. BIND 9 Configuration Reference">
+</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">Chapter 5. The <acronym class="acronym">BIND</acronym> 9 Lightweight Resolver</th></tr>
+<tr>
+<td width="20%" align="left">
+<a accesskey="p" href="Bv9ARM.ch04.html">Prev</a> </td>
+<th width="60%" align="center"> </th>
+<td width="20%" align="right"> <a accesskey="n" href="Bv9ARM.ch06.html">Next</a>
+</td>
+</tr>
+</table>
+<hr>
+</div>
+<div class="chapter">
+<div class="titlepage"><div><div><h1 class="title">
+<a name="Bv9ARM.ch05"></a>Chapter 5. The <acronym class="acronym">BIND</acronym> 9 Lightweight Resolver</h1></div></div></div>
+<div class="toc">
+<p><b>Table of Contents</b></p>
+<dl class="toc">
+<dt><span class="section"><a href="Bv9ARM.ch05.html#lightweight_resolver">The Lightweight Resolver Library</a></span></dt>
+<dt><span class="section"><a href="Bv9ARM.ch05.html#lwresd">Running a Resolver Daemon</a></span></dt>
+</dl>
+</div>
+
+    <div class="section">
+<div class="titlepage"><div><div><h2 class="title" style="clear: both">
+<a name="lightweight_resolver"></a>The Lightweight Resolver Library</h2></div></div></div>
+
+      <p>
+        Traditionally applications have been linked with a stub resolver
+        library that sends recursive DNS queries to a local caching name
+        server.
+      </p>
+      <p>
+        IPv6 once introduced new complexity into the resolution process,
+        such as following A6 chains and DNAME records, and simultaneous
+        lookup of IPv4 and IPv6 addresses.  Though most of the complexity was
+        then removed, these are hard or impossible
+        to implement in a traditional stub resolver.
+      </p>
+      <p>
+        <acronym class="acronym">BIND</acronym> 9 therefore can also provide resolution
+        services to local clients
+        using a combination of a lightweight resolver library and a resolver
+        daemon process running on the local host.  These communicate using
+        a simple UDP-based protocol, the "lightweight resolver protocol"
+        that is distinct from and simpler than the full DNS protocol.
+      </p>
+    </div>
+    <div class="section">
+<div class="titlepage"><div><div><h2 class="title" style="clear: both">
+<a name="lwresd"></a>Running a Resolver Daemon</h2></div></div></div>
+
+      <p>
+        To use the lightweight resolver interface, the system must
+        run the resolver daemon <span class="command"><strong>lwresd</strong></span> or a
+        local
+        name server configured with a <span class="command"><strong>lwres</strong></span>
+        statement.
+      </p>
+
+      <p>
+        By default, applications using the lightweight resolver library will
+        make
+        UDP requests to the IPv4 loopback address (127.0.0.1) on port 921.
+        The
+        address can be overridden by <span class="command"><strong>lwserver</strong></span>
+        lines in
+        <code class="filename">/etc/resolv.conf</code>.
+      </p>
+
+      <p>
+        The daemon currently only looks in the DNS, but in the future
+        it may use other sources such as <code class="filename">/etc/hosts</code>,
+        NIS, etc.
+      </p>
+
+      <p>
+        The <span class="command"><strong>lwresd</strong></span> daemon is essentially a
+        caching-only name server that responds to requests using the
+        lightweight
+        resolver protocol rather than the DNS protocol.  Because it needs
+        to run on each host, it is designed to require no or minimal
+        configuration.
+        Unless configured otherwise, it uses the name servers listed on
+        <span class="command"><strong>nameserver</strong></span> lines in <code class="filename">/etc/resolv.conf</code>
+        as forwarders, but is also capable of doing the resolution
+        autonomously if
+        none are specified.
+      </p>
+      <p>
+        The <span class="command"><strong>lwresd</strong></span> daemon may also be
+        configured with a
+        <code class="filename">named.conf</code> style configuration file,
+        in
+        <code class="filename">/etc/lwresd.conf</code> by default.  A name
+        server may also
+        be configured to act as a lightweight resolver daemon using the
+        <span class="command"><strong>lwres</strong></span> statement in <code class="filename">named.conf</code>.
+      </p>
+      <p>
+        The number of client queries that the <span class="command"><strong>lwresd</strong></span>
+        daemon is able to serve can be set using the
+        <code class="option">lwres-tasks</code> and <code class="option">lwres-clients</code>
+        statements in the configuration.
+      </p>
+    </div>
+  </div>
+<div class="navfooter">
+<hr>
+<table width="100%" summary="Navigation footer">
+<tr>
+<td width="40%" align="left">
+<a accesskey="p" href="Bv9ARM.ch04.html">Prev</a> </td>
+<td width="20%" align="center"> </td>
+<td width="40%" align="right"> <a accesskey="n" href="Bv9ARM.ch06.html">Next</a>
+</td>
+</tr>
+<tr>
+<td width="40%" align="left" valign="top">Chapter 4. Advanced DNS Features </td>
+<td width="20%" align="center"><a accesskey="h" href="Bv9ARM.html">Home</a></td>
+<td width="40%" align="right" valign="top"> Chapter 6. <acronym class="acronym">BIND</acronym> 9 Configuration Reference</td>
+</tr>
+</table>
+</div>
+<p xmlns:db="http://docbook.org/ns/docbook" style="text-align: center;">BIND 9.11.5-P4 (Extended Support Version)</p>
+</body>
+</html>
author	Daniel Baumann <daniel.baumann@progress-linux.org>	2024-05-05 18:37:14 +0000
committer	Daniel Baumann <daniel.baumann@progress-linux.org>	2024-05-05 18:37:14 +0000
commit	ea648e70a989cca190cd7403fe892fd2dcc290b4 (patch)
tree	e2b6b1c647da68b0d4d66082835e256eb30970e8 /doc/arm/Bv9ARM.ch05.html
parent	Initial commit. (diff)
download	bind9-ea648e70a989cca190cd7403fe892fd2dcc290b4.tar.xz bind9-ea648e70a989cca190cd7403fe892fd2dcc290b4.zip