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	<title>Networkers-online.com &#187; Security</title>
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		<title>Black hole filtering</title>
		<link>http://www.networkers-online.com/blog/2009/02/black-hole-filtering/</link>
		<comments>http://www.networkers-online.com/blog/2009/02/black-hole-filtering/#comments</comments>
		<pubDate>Tue, 17 Feb 2009 07:53:45 +0000</pubDate>
		<dc:creator>Wael Osama</dc:creator>
				<category><![CDATA[Security]]></category>

		<guid isPermaLink="false">http://networkers-online.com/blog/?p=180</guid>
		<description><![CDATA[Black hole filtering is a technique usually used by service providers for traffic filtering without applying access-lists. The technique is very useful in mitigation of many types of DOS attacks. The idea behind Black hole filtering is very simple; just define the traffic you want to discard and configure a static route pointing to the [...]


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		<title>MPLS VPN security threats</title>
		<link>http://www.networkers-online.com/blog/2009/01/mpls-vpn-security-threats/</link>
		<comments>http://www.networkers-online.com/blog/2009/01/mpls-vpn-security-threats/#comments</comments>
		<pubDate>Wed, 28 Jan 2009 14:18:04 +0000</pubDate>
		<dc:creator>Wael Osama</dc:creator>
				<category><![CDATA[MPLS]]></category>
		<category><![CDATA[Security]]></category>

		<guid isPermaLink="false">http://networkers-online.com/blog/?p=162</guid>
		<description><![CDATA[MPLS L3 VPN services is widely used nowadays by many enterprises and organizations. They provide a lot of flexibility in connecting different sites compared to L2VPN services and offloads a lot of the responsibilities from the enterprise to the provider. I have gained all my networking experience in service provider environments, and have seen very [...]


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		<title>Unicast Reverse Path Forwarding</title>
		<link>http://www.networkers-online.com/blog/2008/08/unicast-reverse-path-forwarding/</link>
		<comments>http://www.networkers-online.com/blog/2008/08/unicast-reverse-path-forwarding/#comments</comments>
		<pubDate>Tue, 12 Aug 2008 07:07:25 +0000</pubDate>
		<dc:creator>Wael Osama</dc:creator>
				<category><![CDATA[Security]]></category>

		<guid isPermaLink="false">http://networkers-online.com/blog/?p=42</guid>
		<description><![CDATA[In order for a router to perform its function of forwarding packets it only needs to look at the destination address of the IP packet and never at the source; this allows an attacker to send malformed IP packets using spoofed source IP address and your routers will simply forward these malformed packets to their [...]


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		<title>Limiting non-business related applications during work hours</title>
		<link>http://www.networkers-online.com/blog/2008/07/limiting-non-business-related-applications-during-work-hours/</link>
		<comments>http://www.networkers-online.com/blog/2008/07/limiting-non-business-related-applications-during-work-hours/#comments</comments>
		<pubDate>Thu, 10 Jul 2008 11:24:57 +0000</pubDate>
		<dc:creator>Wael Osama</dc:creator>
				<category><![CDATA[CISCO HOW-TO]]></category>
		<category><![CDATA[QOS]]></category>
		<category><![CDATA[Security]]></category>

		<guid isPermaLink="false">http://networkers-online.com/blog/?p=9</guid>
		<description><![CDATA[In this post we will explore how to limit or even stop your employees from using applications that are not related to the business during work hours. In the following example I am going to use HTTP as an example for unwanted applications, you can specify any type of application you would like to limit [...]


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