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	<title>R-fx Networks &#187; HowTo</title>
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	<link>http://www.rfxn.com</link>
	<description> Linux Software &#38; Blog</description>
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		<title>Nginx: Caching Proxy</title>
		<link>http://www.rfxn.com/nginx-caching-proxy/</link>
		<comments>http://www.rfxn.com/nginx-caching-proxy/#comments</comments>
		<pubDate>Thu, 06 May 2010 18:45:56 +0000</pubDate>
		<dc:creator>Ryan M.</dc:creator>
				<category><![CDATA[HowTo]]></category>
		<category><![CDATA[My Blog]]></category>
		<category><![CDATA[apache]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[nginx]]></category>

		<guid isPermaLink="false">http://www.rfxn.com/?p=261</guid>
		<description><![CDATA[Recently I started to tackle a load problem on one of my personal sites, the issue was that of a poorly written but exceedingly MySQL heavy application and the load it would induce on the SQL server when 400-500 people were hammering the site at once. Further compounding this was Apache&#8217;s horrible ability to gracefully <a href="http://www.rfxn.com/nginx-caching-proxy/" class="more-link">More &#62;</a>]]></description>
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		<slash:comments>3</slash:comments>
		</item>
		<item>
		<title>IRSYNC &amp; Limiting Passwordless SSH Keys</title>
		<link>http://www.rfxn.com/irsync-limiting-passwordless-ssh-keys/</link>
		<comments>http://www.rfxn.com/irsync-limiting-passwordless-ssh-keys/#comments</comments>
		<pubDate>Tue, 04 May 2010 15:54:38 +0000</pubDate>
		<dc:creator>Ryan M.</dc:creator>
				<category><![CDATA[HowTo]]></category>
		<category><![CDATA[backup]]></category>
		<category><![CDATA[incremental]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[rsync]]></category>
		<category><![CDATA[ssh]]></category>

		<guid isPermaLink="false">http://www.rfxn.com/?p=223</guid>
		<description><![CDATA[Anyone who has ever used SSH key-pairs to access more than a couple of servers (or hundreds in my case), will tell you they are an invaluable convenience. It is a natural progression and very common usage that SSH key-pairs are coupled with other common tasks or tools, where having a pass phrase attached to <a href="http://www.rfxn.com/irsync-limiting-passwordless-ssh-keys/" class="more-link">More &#62;</a>]]></description>
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		<slash:comments>0</slash:comments>
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		<item>
		<title>Upgrade CentOS 4.8 to 5.3</title>
		<link>http://www.rfxn.com/upgrade-centos-4-8-to-5-3/</link>
		<comments>http://www.rfxn.com/upgrade-centos-4-8-to-5-3/#comments</comments>
		<pubDate>Tue, 20 Oct 2009 07:10:58 +0000</pubDate>
		<dc:creator>Ryan M.</dc:creator>
				<category><![CDATA[HowTo]]></category>
		<category><![CDATA[centos]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[upgrade]]></category>

		<guid isPermaLink="false">http://www.rfxn.com/?p=162</guid>
		<description><![CDATA[Traditionally, the dist upgrade path that many were familiar with from the RH8/9-&#62;Fedora or similarly Fedora dist upgrades, have applied more or less to RHEL/CentOS but with the release of 4.5 and early releases of 5.0 the actual dist upgrade path was messy or nearly impossible. The early versions of 5.0 (up to 5.2) had <a href="http://www.rfxn.com/upgrade-centos-4-8-to-5-3/" class="more-link">More &#62;</a>]]></description>
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		<slash:comments>9</slash:comments>
		</item>
		<item>
		<title>Snorting the Web Farm</title>
		<link>http://www.rfxn.com/the-power-of-snort-custom-rules/</link>
		<comments>http://www.rfxn.com/the-power-of-snort-custom-rules/#comments</comments>
		<pubDate>Wed, 10 Jun 2009 22:24:36 +0000</pubDate>
		<dc:creator>Ryan M.</dc:creator>
				<category><![CDATA[Development]]></category>
		<category><![CDATA[HowTo]]></category>
		<category><![CDATA[ips]]></category>
		<category><![CDATA[snort]]></category>

		<guid isPermaLink="false">http://www.rfxn.com/?p=113</guid>
		<description><![CDATA[Here are some rules for you snort freaks to chew on that I have found useful in web heavy environments.
alert tcp $HTTP_SERVERS $HTTP_PORTS -&#62; any any (msg:"ET ATTACK RESPONSE x2300 phpshell detected"; content:"Locus7Shell"; nocase; classtype:web-application-activity; reference:url,www.rfxn.com; sid:300010; rev:1;)
alert tcp $HTTP_SERVERS $HTTP_PORTS -&#62; any any (msg:"ET ATTACK RESPONSE RFI Scanner detected"; content:"RFI Scanner"; classtype:web-application-activity; reference:url,www.rfxn.com; sid:300020; <a href="http://www.rfxn.com/the-power-of-snort-custom-rules/" class="more-link">More &#62;</a>]]></description>
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		<slash:comments>1</slash:comments>
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		<title>BOGON Filtering, Update It</title>
		<link>http://www.rfxn.com/bogon-filtering-update-it/</link>
		<comments>http://www.rfxn.com/bogon-filtering-update-it/#comments</comments>
		<pubDate>Sat, 18 Apr 2009 00:45:37 +0000</pubDate>
		<dc:creator>Ryan M.</dc:creator>
				<category><![CDATA[Development]]></category>
		<category><![CDATA[HowTo]]></category>
		<category><![CDATA[apf]]></category>
		<category><![CDATA[arin]]></category>
		<category><![CDATA[bogon]]></category>

		<guid isPermaLink="false">http://www.rfxn.com/?p=102</guid>
		<description><![CDATA[One of the features used by APF to prevent address spoofing is that it filters reserved IP address space, also known as BOGON filtering. This is an otherwise very reliable method to keep out random unallocated spoofed addresses from injecting traffic towards your server, assuming of course the list is updated regularly.
We decided a few <a href="http://www.rfxn.com/bogon-filtering-update-it/" class="more-link">More &#62;</a>]]></description>
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		<slash:comments>0</slash:comments>
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