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diff --git a/contrib/bind9/doc/arm/Bv9ARM.ch05.html b/contrib/bind9/doc/arm/Bv9ARM.ch05.html index 51abc58..7d06e91 100644 --- a/contrib/bind9/doc/arm/Bv9ARM.ch05.html +++ b/contrib/bind9/doc/arm/Bv9ARM.ch05.html @@ -1,5 +1,5 @@ <!-- - - Copyright (C) 2004-2006 Internet Systems Consortium, Inc. ("ISC") + - Copyright (C) 2004-2007 Internet Systems Consortium, Inc. ("ISC") - Copyright (C) 2000-2003 Internet Software Consortium. - - Permission to use, copy, modify, and distribute this software for any @@ -14,12 +14,12 @@ - OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR - PERFORMANCE OF THIS SOFTWARE. --> -<!-- $Id: Bv9ARM.ch05.html,v 1.24.2.5.2.17 2006/06/29 13:02:31 marka Exp $ --> +<!-- $Id: Bv9ARM.ch05.html,v 1.33.18.28 2007/01/30 00:23:45 marka Exp $ --> <html> <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 V1.70.1"> +<meta name="generator" content="DocBook XSL Stylesheets V1.71.1"> <link rel="start" 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"> @@ -45,53 +45,81 @@ <div class="toc"> <p><b>Table of Contents</b></p> <dl> -<dt><span class="sect1"><a href="Bv9ARM.ch05.html#id2574507">The Lightweight Resolver Library</a></span></dt> +<dt><span class="sect1"><a href="Bv9ARM.ch05.html#id2572055">The Lightweight Resolver Library</a></span></dt> <dt><span class="sect1"><a href="Bv9ARM.ch05.html#lwresd">Running a Resolver Daemon</a></span></dt> </dl> </div> <div class="sect1" lang="en"> <div class="titlepage"><div><div><h2 class="title" style="clear: both"> -<a name="id2574507"></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>Instead, <acronym class="acronym">BIND</acronym> 9 provides 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> +<a name="id2572055"></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="sect1" lang="en"> <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><strong class="command">lwresd</strong></span> or a local -name server configured with a <span><strong class="command">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><strong class="command">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><strong class="command">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><strong class="command">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><strong class="command">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><strong class="command">lwres</strong></span> statement in <code class="filename">named.conf</code>.</p> +<p> + To use the lightweight resolver interface, the system must + run the resolver daemon <span><strong class="command">lwresd</strong></span> or a + local + name server configured with a <span><strong class="command">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><strong class="command">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><strong class="command">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><strong class="command">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><strong class="command">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><strong class="command">lwres</strong></span> statement in <code class="filename">named.conf</code>. + </p> </div> </div> <div class="navfooter"> |
