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	<title>Blog O' Matty &#187; DNS &amp; BIND</title>
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	<link>http://prefetch.net/blog</link>
	<description>Blog O' Matty</description>
	<lastBuildDate>Wed, 16 May 2012 00:16:36 +0000</lastBuildDate>
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		<item>
		<title>Bind&#8217;s strict zone checking feature is part of CentOS 6</title>
		<link>http://prefetch.net/blog/index.php/2012/01/16/binds-strict-zone-checking-feature-is-part-of-centos-6/</link>
		<comments>http://prefetch.net/blog/index.php/2012/01/16/binds-strict-zone-checking-feature-is-part-of-centos-6/#comments</comments>
		<pubDate>Mon, 16 Jan 2012 13:51:36 +0000</pubDate>
		<dc:creator>matty</dc:creator>
				<category><![CDATA[DNS & BIND]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/?p=5261</guid>
		<description><![CDATA[I recently moved a bind installation from CentOS 5 to CentOS 6. As part of the move I built out a new server with CentOS 6, staged the bind chroot packages and then proceeded to copy all of the zone files from the CentOS 5 server to the CentOS 6 server. Once all the pieces [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2012/01/16/binds-strict-zone-checking-feature-is-part-of-centos-6/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Configuring NSCD to cache DNS host lookups</title>
		<link>http://prefetch.net/blog/index.php/2011/03/27/configuring-nscd-to-cache-dns-host-lookups/</link>
		<comments>http://prefetch.net/blog/index.php/2011/03/27/configuring-nscd-to-cache-dns-host-lookups/#comments</comments>
		<pubDate>Sun, 27 Mar 2011 14:54:01 +0000</pubDate>
		<dc:creator>mike</dc:creator>
				<category><![CDATA[DNS & BIND]]></category>
		<category><![CDATA[Linux Misc]]></category>
		<category><![CDATA[Linux Utilities]]></category>
		<category><![CDATA[Solaris Utilities]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/?p=4277</guid>
		<description><![CDATA[I haven&#8217;t really spent that much time configuring nscd, so I thought I would take a crack at it this morning while sipping my cup of joe. Looking at one of my production hosts, I queried for the &#8220;host&#8221; cache statistics. This is the nscd cache which keeps DNS lookups. With the nscd daemon running, [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2011/03/27/configuring-nscd-to-cache-dns-host-lookups/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>Using dnscap to debug DNS problems on Linux hosts</title>
		<link>http://prefetch.net/blog/index.php/2011/01/26/using-dnscap-to-debug-dns-problems-on-linux-hosts/</link>
		<comments>http://prefetch.net/blog/index.php/2011/01/26/using-dnscap-to-debug-dns-problems-on-linux-hosts/#comments</comments>
		<pubDate>Wed, 26 Jan 2011 18:30:42 +0000</pubDate>
		<dc:creator>matty</dc:creator>
				<category><![CDATA[DNS & BIND]]></category>
		<category><![CDATA[Linux Utilities]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/?p=4172</guid>
		<description><![CDATA[DNS can often make a SysAdmins life difficult, since a misconfigured entry or a broken authoritative DNS server will cause things to fail in odd ways. If you are fortunate enough to use Linux on your servers and desktops, you have a slew of utilities available to look at problems. I&#8217;ve discussed a few of [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2011/01/26/using-dnscap-to-debug-dns-problems-on-linux-hosts/feed/</wfw:commentRss>
		<slash:comments>3</slash:comments>
		</item>
		<item>
		<title>Configuring a caching only DNS server on Solaris hosts</title>
		<link>http://prefetch.net/blog/index.php/2010/07/14/configuring-a-caching-only-dns-server-on-solaris-hosts/</link>
		<comments>http://prefetch.net/blog/index.php/2010/07/14/configuring-a-caching-only-dns-server-on-solaris-hosts/#comments</comments>
		<pubDate>Wed, 14 Jul 2010 22:07:31 +0000</pubDate>
		<dc:creator>matty</dc:creator>
				<category><![CDATA[DNS & BIND]]></category>
		<category><![CDATA[Solaris Networking]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/?p=3751</guid>
		<description><![CDATA[While investigating a performance issue a few weeks back, I noticed that a couple of our Solaris hosts were sending 10s of thousands of DNS requests to our authoritative DNS servers. Since the application was broken and unable to cache DNS records, I decided to configure a local caching only DNS server to reduce load [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2010/07/14/configuring-a-caching-only-dns-server-on-solaris-hosts/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>Getting DNS ping (aka nsping) to compile on Linux hosts</title>
		<link>http://prefetch.net/blog/index.php/2010/07/01/getting-dns-ping-aka-nsping-to-compile-on-linux-hosts/</link>
		<comments>http://prefetch.net/blog/index.php/2010/07/01/getting-dns-ping-aka-nsping-to-compile-on-linux-hosts/#comments</comments>
		<pubDate>Thu, 01 Jul 2010 15:07:47 +0000</pubDate>
		<dc:creator>matty</dc:creator>
				<category><![CDATA[DNS & BIND]]></category>
		<category><![CDATA[Linux Utilities]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/?p=3628</guid>
		<description><![CDATA[While debugging a DNS issue this week, I wanted to run my trusty old friend nsping on my Linux desktop. I grabbed the source from the FreeBSD source site, checked to make sure the bits were legit, then proceeded to compile it: $ make cc -g -c -o nsping.o nsping.c In file included from nsping.c:13: [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2010/07/01/getting-dns-ping-aka-nsping-to-compile-on-linux-hosts/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Preventing domain expiration article</title>
		<link>http://prefetch.net/blog/index.php/2007/09/03/preventing-domain-expiration-article/</link>
		<comments>http://prefetch.net/blog/index.php/2007/09/03/preventing-domain-expiration-article/#comments</comments>
		<pubDate>Mon, 03 Sep 2007 14:44:37 +0000</pubDate>
		<dc:creator>matty</dc:creator>
				<category><![CDATA[DNS & BIND]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/index.php/2007/09/03/preventing-domain-expiration-article/</guid>
		<description><![CDATA[I just came across Rick Moen&#8217;s Preventing Domain Expiration article. Rick did a great job with the article, and it&#8217;s cool to see that they took my domain-check shell script and implemented it in Perl. The Perl version supports for TLDS, and contains a bit more functionality than the bash implementation. If I get some [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2007/09/03/preventing-domain-expiration-article/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Logfile format for BIND queries</title>
		<link>http://prefetch.net/blog/index.php/2006/12/10/logfile-format-for-bind-queries/</link>
		<comments>http://prefetch.net/blog/index.php/2006/12/10/logfile-format-for-bind-queries/#comments</comments>
		<pubDate>Mon, 11 Dec 2006 02:22:11 +0000</pubDate>
		<dc:creator>matty</dc:creator>
				<category><![CDATA[DNS & BIND]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/index.php/2006/12/10/logfile-format-for-bind-queries/</guid>
		<description><![CDATA[While perusing my BIND query logs, I came across the following entry: Nov 21 12:34:41 dns named[780]: [ID 866145 local0.info] client 1.2.3.4#32773: query: yikes.com IN MX -E All of the text up to the record type (MX in this case) made sense, but I had no idea what the &#8220;-E&#8221; meant. Being the curious person [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2006/12/10/logfile-format-for-bind-queries/feed/</wfw:commentRss>
		<slash:comments>7</slash:comments>
		</item>
		<item>
		<title>Measuring DNS latency with nsping</title>
		<link>http://prefetch.net/blog/index.php/2006/11/24/viewing-dns-latency-with-nsping/</link>
		<comments>http://prefetch.net/blog/index.php/2006/11/24/viewing-dns-latency-with-nsping/#comments</comments>
		<pubDate>Sat, 25 Nov 2006 01:27:21 +0000</pubDate>
		<dc:creator>matty</dc:creator>
				<category><![CDATA[DNS & BIND]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/index.php/2006/11/24/viewing-dns-latency-with-nsping/</guid>
		<description><![CDATA[While debugging a DNS problem a few weeks back, I needed a way to measure the time it took a name server to respond to a DNS request. After poking around the OpenBSD ports collection, I came across the nsping utility. Nsping queries a DNS server passed on the command line, and reports the time [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2006/11/24/viewing-dns-latency-with-nsping/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Limiting how much memory BIND can use</title>
		<link>http://prefetch.net/blog/index.php/2006/09/16/limiting-how-much-memory-bind-can-use/</link>
		<comments>http://prefetch.net/blog/index.php/2006/09/16/limiting-how-much-memory-bind-can-use/#comments</comments>
		<pubDate>Sat, 16 Sep 2006 17:12:24 +0000</pubDate>
		<dc:creator>matty</dc:creator>
				<category><![CDATA[DNS & BIND]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/index.php/2006/09/16/limiting-how-much-memory-bind-can-use/</guid>
		<description><![CDATA[I support BIND on a few servers, and when run as a caching name server, BIND can consume a fair amount of memory if you have lots of clients. There are two ways to restrict the amount of memory BIND uses. The first method, which is described in Pro DNS and BIND, is to set [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2006/09/16/limiting-how-much-memory-bind-can-use/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>Monitoring DNS servers</title>
		<link>http://prefetch.net/blog/index.php/2006/08/20/monitoring-dns-servers/</link>
		<comments>http://prefetch.net/blog/index.php/2006/08/20/monitoring-dns-servers/#comments</comments>
		<pubDate>Sun, 20 Aug 2006 18:43:53 +0000</pubDate>
		<dc:creator>matty</dc:creator>
				<category><![CDATA[DNS & BIND]]></category>

		<guid isPermaLink="false">http://prefetch.net/blog/index.php/2006/08/20/monitoring-dns-servers/</guid>
		<description><![CDATA[I recently started supporting several DNS servers running BIND 9. To ensure that these server are up and operational at all times, I wrote a small shell script named dns-check to test the operational state of each server. The script takes a file as an argument, and each line in the file contains the IP [...]]]></description>
		<wfw:commentRss>http://prefetch.net/blog/index.php/2006/08/20/monitoring-dns-servers/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
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