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	<title>I.T. Security and Linux Administration &#187; authentication</title>
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		<item>
		<title>Two-Factor Authentication in PHP Using SSH</title>
		<link>http://itknowledgeexchange.techtarget.com/security-admin/two-factor-authentication-in-php-using-ssh/</link>
		<comments>http://itknowledgeexchange.techtarget.com/security-admin/two-factor-authentication-in-php-using-ssh/#comments</comments>
		<pubDate>Thu, 15 Mar 2012 20:18:33 +0000</pubDate>
		<dc:creator>Eric Hansen</dc:creator>
				<category><![CDATA[authentication]]></category>
		<category><![CDATA[PHP]]></category>
		<category><![CDATA[SSH]]></category>
		<category><![CDATA[Two-Factor]]></category>

		<guid isPermaLink="false">http://itknowledgeexchange.techtarget.com/security-admin/two-factor-authentication-in-php-using-ssh/</guid>
		<description><![CDATA[For a good couple of years now I&#8217;ve wondered if there was a way to write an authentication system in PHP that utilized SSH instead of the widely-breakable database and flatfile methods. After doing some research I found its possible after installing a PHP extension. This guide will detail the methods used to do this, [...]]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Is SMTP Authentication Necessary?</title>
		<link>http://itknowledgeexchange.techtarget.com/security-admin/is-smtp-authentication-necessary/</link>
		<comments>http://itknowledgeexchange.techtarget.com/security-admin/is-smtp-authentication-necessary/#comments</comments>
		<pubDate>Fri, 27 Jan 2012 17:43:45 +0000</pubDate>
		<dc:creator>Eric Hansen</dc:creator>
				<category><![CDATA[authentication]]></category>
		<category><![CDATA[Postfix]]></category>
		<category><![CDATA[SMTP]]></category>

		<guid isPermaLink="false">http://itknowledgeexchange.techtarget.com/security-admin/is-smtp-authentication-necessary/</guid>
		<description><![CDATA[Basically every guide you see online or read about on how to set up a SMTP server says you need to have SMTP authentication enabled to be safe (and to avoid open relay attacks).  While yes, you do need this if you&#8217;re running an enterprise-level system that requires remote connections from smart phones, laptops/PCs at [...]]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Duo Security Review</title>
		<link>http://itknowledgeexchange.techtarget.com/security-admin/duo-security-review/</link>
		<comments>http://itknowledgeexchange.techtarget.com/security-admin/duo-security-review/#comments</comments>
		<pubDate>Tue, 27 Sep 2011 02:47:42 +0000</pubDate>
		<dc:creator>Eric Hansen</dc:creator>
				<category><![CDATA[authentication]]></category>
		<category><![CDATA[Duo Security]]></category>
		<category><![CDATA[PAM]]></category>
		<category><![CDATA[Server]]></category>
		<category><![CDATA[SMS]]></category>
		<category><![CDATA[VPN]]></category>
		<category><![CDATA[Web]]></category>

		<guid isPermaLink="false">http://itknowledgeexchange.techtarget.com/security-admin/duo-security-review/</guid>
		<description><![CDATA[I&#8217;ve written about two-factor authentication methods before (namely using the Google Authenticator to log in to SSH).  While that method was fine, there&#8217;s also a new product that&#8217;s come out over the year or so, and is also local to my home.  It&#8217;s called Duo Security, and they have an authenticator system that takes it [...]]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>MongoDB PAM Module</title>
		<link>http://itknowledgeexchange.techtarget.com/security-admin/mongodb-pam-module/</link>
		<comments>http://itknowledgeexchange.techtarget.com/security-admin/mongodb-pam-module/#comments</comments>
		<pubDate>Tue, 05 Jul 2011 20:27:20 +0000</pubDate>
		<dc:creator>Eric Hansen</dc:creator>
				<category><![CDATA[authentication]]></category>
		<category><![CDATA[MongoDB]]></category>
		<category><![CDATA[PAM]]></category>

		<guid isPermaLink="false">http://itknowledgeexchange.techtarget.com/security-admin/mongodb-pam-module/</guid>
		<description><![CDATA[I waited for a little bit to post this, but I recently ventured into the realm of writing PAM modules, and my first project has been finished. This is a MongoDB authentication module. In short, it allows you to authenticate users to a MongoDB database that the user has access to (for added security, the [...]]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>HOTP Authentication via PAM</title>
		<link>http://itknowledgeexchange.techtarget.com/security-admin/hotp-authentication-via-pam/</link>
		<comments>http://itknowledgeexchange.techtarget.com/security-admin/hotp-authentication-via-pam/#comments</comments>
		<pubDate>Sun, 29 May 2011 05:02:25 +0000</pubDate>
		<dc:creator>Eric Hansen</dc:creator>
				<category><![CDATA[authentication]]></category>
		<category><![CDATA[HOTP]]></category>
		<category><![CDATA[PAM]]></category>

		<guid isPermaLink="false">http://itknowledgeexchange.techtarget.com/security-admin/?p=175</guid>
		<description><![CDATA[For some reason, May has seemed to be authentication month for me.  I just finished writing an article about SHA-12 encryption for passwords, Two Factor Authentication via SSH, and now I&#8217;m here for a new adventure. As mentioned in the two-factor article, I would write about my adventures in using it to authenticate users on [...]]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>SHA-512 Authentication</title>
		<link>http://itknowledgeexchange.techtarget.com/security-admin/sha-512-authentication/</link>
		<comments>http://itknowledgeexchange.techtarget.com/security-admin/sha-512-authentication/#comments</comments>
		<pubDate>Fri, 27 May 2011 14:40:37 +0000</pubDate>
		<dc:creator>Eric Hansen</dc:creator>
				<category><![CDATA[authentication]]></category>
		<category><![CDATA[SHA-512]]></category>
		<category><![CDATA[SSH]]></category>

		<guid isPermaLink="false">http://itknowledgeexchange.techtarget.com/security-admin/sha-512-authentication/</guid>
		<description><![CDATA[I&#8217;ve been trying to figure out for a little bit now how to do use the previously written Two Factor Authentication via SSH article for logging into my system directly. While it&#8217;s probably the same for SSH as it is for anything else involving PAM authentication, I haven&#8217;t actually dived into it too far currently. [...]]]></description>
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		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>Two-Factor Authentication via SSH</title>
		<link>http://itknowledgeexchange.techtarget.com/security-admin/two-factor-authentication-via-ssh/</link>
		<comments>http://itknowledgeexchange.techtarget.com/security-admin/two-factor-authentication-via-ssh/#comments</comments>
		<pubDate>Tue, 10 May 2011 14:21:59 +0000</pubDate>
		<dc:creator>Eric Hansen</dc:creator>
				<category><![CDATA[authentication]]></category>
		<category><![CDATA[SSH]]></category>
		<category><![CDATA[Two-Factor]]></category>

		<guid isPermaLink="false">http://itknowledgeexchange.techtarget.com/security-admin/two-factor-authentication-via-ssh/</guid>
		<description><![CDATA[Security and smart phones, a great combination when used in the right situations.  A while ago, Google released their two-factor authentication mechanism, as well as released software to run on iPhones, Blackberries, and of course Android.  Since they released this, I was wondering how long it&#8217;d take to really take power with this for IT [...]]]></description>
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		<slash:comments>2</slash:comments>
		</item>
		<item>
		<title>SSH Security (Part 2)</title>
		<link>http://itknowledgeexchange.techtarget.com/security-admin/ssh-security-part-2/</link>
		<comments>http://itknowledgeexchange.techtarget.com/security-admin/ssh-security-part-2/#comments</comments>
		<pubDate>Sat, 06 Nov 2010 15:23:30 +0000</pubDate>
		<dc:creator>Eric Hansen</dc:creator>
				<category><![CDATA[authentication]]></category>
		<category><![CDATA[certificate]]></category>
		<category><![CDATA[security]]></category>
		<category><![CDATA[SSH]]></category>

		<guid isPermaLink="false">http://itknowledgeexchange.techtarget.com/security-admin/?p=25</guid>
		<description><![CDATA[In the last part, there was a lot of planning, and preparation, for setting up SSH to use certificates instead of passwords to authenticate a user. Now comes the configuration and trial-and-error portion. First thing I&#8217;m going to cover is the sshd_config file (config file for the SSH daemon), which is usually found in /etc/ssh/sshd_config. [...]]]></description>
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		<slash:comments>0</slash:comments>
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