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<h1 class="topictitle1">Domain Name System</h1>
<div><p>Domain Name System (DNS) is a distributed database system for managing
host names and their associated Internet Protocol (IP) addresses.</p>
<p>Using DNS means that people can use simple names, such as www.jkltoys.com
to locate a host, rather than using the IP address (xxx.xxx.xxx.xxx). A single
server might only be responsible for knowing the host names and IP addresses
for a small subset of a zone, but DNS servers can work together to map all
domain names to their IP addresses. DNS servers working together is what allows
computers to communicate across the Internet.</p>
<p>For IBM<sup>®</sup> OS/400<sup>®</sup> Version
5 Release 1 (V5R1), DNS services are based on the industry-standard DNS implementation,
known as Berkeley Internet Name Domain (BIND) version 8. Previous IBM OS/400 DNS
services were based on BIND version 4.9.3. i5/OS™ option 33, Portable Application Solutions
Environment (PASE), must be installed on your IBM eServer™ iSeries™ server in order to use the new
BIND version 8-based DNS server. If you do not have PASE installed, you can
still run the same DNS server based on BIND version 4.9.3 that was available
in previous releases. However, the migration to BIND 8 provides improved function
and incorporates better security for your DNS server.</p>
<div class="note"><span class="notetitle">Note:</span> This topic discusses new features based on BIND 8. If you are not using
PASE to run DNS based on BIND 8, see the <a href="rzaismst.pdf" target="_blank">V4R5 DNS information center</a> topic for information
regarding DNS based on BIND 4.9.3.</div>
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<ul class="ullinks">
<li class="ulchildlink"><strong><a href="rzakkprintthis.htm">Printable PDF</a></strong><br />
Use this to view and print a PDF of this information.</li>
<li class="ulchildlink"><strong><a href="rzakkconceptparent.htm">Domain Name System concepts</a></strong><br />
This topic explains what Domain Name System (DNS) is and how it works. It also shows the different types of zones that can be defined on a DNS server.</li>
<li class="ulchildlink"><strong><a href="rzakkexampleparent.htm">Domain Name System examples</a></strong><br />
You can use these examples to understand how to use Domain Name System (DNS) in your network.</li>
<li class="ulchildlink"><strong><a href="rzakkplanning.htm">Plan for Domain Name System</a></strong><br />
Domain Name System (DNS) offers a variety of solutions. Before you configure DNS, it is important to plan how it works within your network. Subjects, such as network structure, performance, and security, should be assessed before you implement DNS.</li>
<li class="ulchildlink"><strong><a href="rzakkinstalling.htm">Domain Name System requirements</a></strong><br />
This topic describes the software requirements to run Domain Name
System (DNS) on your iSeries server.</li>
<li class="ulchildlink"><strong><a href="rzakkconfiguring.htm">Configure Domain Name System</a></strong><br />
This topic explains how to use iSeries Navigator to configure name servers
and to resolve queries outside of your domain.</li>
<li class="ulchildlink"><strong><a href="rzakkmanaging.htm">Manage Domain Name System</a></strong><br />
This topic discusses how to verify Domain Name System (DNS) function, monitor performance, and maintain DNS data and files.</li>
<li class="ulchildlink"><strong><a href="rzakktroubleshooting.htm">Troubleshoot Domain Name System</a></strong><br />
This topic explains Domain Name System (DNS) logging and debugging settings that can help you resolve problems with your DNS server.</li>
<li class="ulchildlink"><strong><a href="rzakksources.htm">Related information for Domain Name System</a></strong><br />
Listed here are the IBM Redbooks™ (in PDF format) and Web sites
that relate to the Domain Name System (DNS) topic. You can view or print any
of the PDFs.</li>
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