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- First pass at making the DNS section less BIND specific and mentioning Unbound.

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Brad Davis 2014-03-31 00:32:09 +00:00
parent 723fc057c5
commit 80d68106f4
Notes: svn2git 2020-12-08 03:00:23 +00:00 
svn path=/head/; revision=44393
1 changed files with 25 additions and 17 deletions
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42
en_US.ISO8859-1/books/handbook/network-servers/chapter.xml
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@ -2945,33 +2945,41 @@ dhcpd_ifaces="dc0"</programlisting>
-->
<title>Domain Name System (<acronym>DNS</acronym>)</title>
<indexterm><primary>BIND</primary></indexterm>
<indexterm><primary>DNS</primary></indexterm>
<para>Domain Name System (<acronym>DNS</acronym>) is the protocol
through which domain names are mapped to <acronym>IP</acronym>
addresses, and vice versa. By default, &os; installs the
Berkeley Internet Name Domain (<acronym>BIND</acronym>), which
is the most common implementation of the <acronym>DNS</acronym>
protocol. The &os; version provides enhanced security features,
a new file system layout, and automated &man.chroot.8;
configuration. BIND is maintained by the <link
xlink:href="https://www.isc.org/">isc.org</link>. It is not
necessary to run a name server to perform <acronym>DNS</acronym>
lookups on a system.</para>
addresses, and vice versa. <acronym>DNS</acronym> is coordinated
across the Internet through a somewhat complex system of
authoritative root, Top Level Domain (<acronym>TLD</acronym>),
and other smaller-scale name servers, which host and cache
individual domain information. It is not necessary to run a name
server to perform <acronym>DNS</acronym> lookups on a system.</para>
<indexterm><primary>DNS</primary></indexterm>
<para><acronym>DNS</acronym> is coordinated across the Internet
through a somewhat complex system of authoritative root, Top
Level Domain (<acronym>TLD</acronym>), and other smaller-scale
name servers, which host and cache individual domain
information. Table 28.4 describes some of the terms associated
with <acronym>DNS</acronym>:</para>
<indexterm><primary>BIND</primary></indexterm>
<para>In &os; 10, the Berkeley Internet Name Domain
(<acronym>BIND</acronym>) has been removed from the base system
and replaced with Unbound. Unbound as configured in the &os;
Base is a local caching resolver. <acronym>BIND</acronym> is
still available from The Ports Collection as <package
role="port">dns/bind99</package> or <package
role="port">dns/bind98</package>. In &os; 9 and lower,
<acronym>BIND</acronym> is included in &os; Base. The &os;
version provides enhanced security features, a new file system
layout, and automated &man.chroot.8; configuration.
<acronym>BIND</acronym> is maintained by the <link
xlink:href="https://www.isc.org/">Internet Systems
Consortium</link>.</para>
<indexterm><primary>resolver</primary></indexterm>
<indexterm><primary>reverse
<acronym>DNS</acronym></primary></indexterm>
<indexterm><primary>root zone</primary></indexterm>
<para>The following table describes some of the terms associated
with <acronym>DNS</acronym>:</para>
<table frame="none" pgwide="1">
<title><acronym>DNS</acronym> Terminology</title>