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	<title>blog.anta.net &#187; firewalls</title>
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	<description>Internetworking, security, safety and more</description>
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		<title>Why just say no to IM at work</title>
		<link>http://blog.anta.net/2009/10/28/why-just-say-no-to-im-at-work/</link>
		<comments>http://blog.anta.net/2009/10/28/why-just-say-no-to-im-at-work/#comments</comments>
		<pubDate>Wed, 28 Oct 2009 22:41:45 +0000</pubDate>
		<dc:creator>Thor Kottelin</dc:creator>
				<category><![CDATA[Internetworking]]></category>
		<category><![CDATA[Security]]></category>
		<category><![CDATA[encryption]]></category>
		<category><![CDATA[firewalls]]></category>
		<category><![CDATA[instant messaging]]></category>
		<category><![CDATA[malware]]></category>
		<category><![CDATA[UDP]]></category>
		<category><![CDATA[vulnerabilities]]></category>
		<category><![CDATA[wire tapping]]></category>

		<guid isPermaLink="false">http://blog.anta.net/?p=825</guid>
		<description><![CDATA[People sometimes ask me for my business IM address. Well, I do not have one, because I do not use IM for business transactions. However, if you do, please make sure that you are aware of the risks involved. Here are a couple of the topmost reasons why IM, IMO, does not mix well with [...]<script type="text/javascript">SHARETHIS.addEntry({ title: "Why just say no to IM at work", url: "http://blog.anta.net/2009/10/28/why-just-say-no-to-im-at-work/" });</script>]]></description>
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		<title>DNS anti-forgery methods published as RFC</title>
		<link>http://blog.anta.net/2009/01/29/dns-anti-forgery-methods-published-as-rfc/</link>
		<comments>http://blog.anta.net/2009/01/29/dns-anti-forgery-methods-published-as-rfc/#comments</comments>
		<pubDate>Thu, 29 Jan 2009 09:01:47 +0000</pubDate>
		<dc:creator>Thor Kottelin</dc:creator>
				<category><![CDATA[Internetworking]]></category>
		<category><![CDATA[Security]]></category>
		<category><![CDATA[Bert Hubert]]></category>
		<category><![CDATA[caching]]></category>
		<category><![CDATA[DNS]]></category>
		<category><![CDATA[Equinix]]></category>
		<category><![CDATA[firewalls]]></category>
		<category><![CDATA[IP addresses]]></category>
		<category><![CDATA[NAT]]></category>
		<category><![CDATA[Netherlabs]]></category>
		<category><![CDATA[ports]]></category>
		<category><![CDATA[query IDs]]></category>
		<category><![CDATA[Remco van Mook]]></category>
		<category><![CDATA[RFC]]></category>
		<category><![CDATA[spoofing]]></category>
		<category><![CDATA[TCP]]></category>
		<category><![CDATA[UDP]]></category>

		<guid isPermaLink="false">http://blog.anta.net/?p=504</guid>
		<description><![CDATA[Bert Hubert (of Netherlabs Computer Consulting&#160;BV.) and Remco van Mook (of&#160;Equinix) today published RFC&#160;5452, “Measures for Making DNS More Resilient against Forged Answers”. The memo is intended as a guide to interim anti-spoofing measures while the world awaits a more secure DNS. (Of course, the latter anticipation should not be spent in a state of [...]<script type="text/javascript">SHARETHIS.addEntry({ title: "DNS anti-forgery methods published as RFC", url: "http://blog.anta.net/2009/01/29/dns-anti-forgery-methods-published-as-rfc/" });</script>]]></description>
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		<title>Looking for Ethernet segment peers</title>
		<link>http://blog.anta.net/2008/08/19/looking-for-ethernet-segment-peers/</link>
		<comments>http://blog.anta.net/2008/08/19/looking-for-ethernet-segment-peers/#comments</comments>
		<pubDate>Tue, 19 Aug 2008 10:55:19 +0000</pubDate>
		<dc:creator>Thor Kottelin</dc:creator>
				<category><![CDATA[Internetworking]]></category>
		<category><![CDATA[addresses]]></category>
		<category><![CDATA[ARP]]></category>
		<category><![CDATA[broadcasts]]></category>
		<category><![CDATA[Ethernet]]></category>
		<category><![CDATA[firewalls]]></category>
		<category><![CDATA[hosts]]></category>
		<category><![CDATA[Internet]]></category>
		<category><![CDATA[IP]]></category>
		<category><![CDATA[Mac]]></category>
		<category><![CDATA[masks]]></category>
		<category><![CDATA[Microsoft]]></category>
		<category><![CDATA[ping]]></category>
		<category><![CDATA[protocols]]></category>
		<category><![CDATA[segments]]></category>
		<category><![CDATA[Windows]]></category>

		<guid isPermaLink="false">http://blog.anta.net/?p=310</guid>
		<description><![CDATA[As I recently wrote a brief set of instructions for checking whether there are any other Ethernet hosts on the same segment as you, I might as well post it here. Assumptions a Microsoft® Windows® workstation or server an Ethernet IPv4 network nothing prevents you from sending ping requests nothing prevents any other hosts on [...]<script type="text/javascript">SHARETHIS.addEntry({ title: "Looking for Ethernet segment peers", url: "http://blog.anta.net/2008/08/19/looking-for-ethernet-segment-peers/" });</script>]]></description>
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		<title>Antivirus + firewall = important</title>
		<link>http://blog.anta.net/2008/05/19/antivirus-firewall-important/</link>
		<comments>http://blog.anta.net/2008/05/19/antivirus-firewall-important/#comments</comments>
		<pubDate>Mon, 19 May 2008 03:50:22 +0000</pubDate>
		<dc:creator>Thor Kottelin</dc:creator>
				<category><![CDATA[Internetworking]]></category>
		<category><![CDATA[Security]]></category>
		<category><![CDATA[attacks]]></category>
		<category><![CDATA[Citrix]]></category>
		<category><![CDATA[companies]]></category>
		<category><![CDATA[computers]]></category>
		<category><![CDATA[firewalls]]></category>
		<category><![CDATA[fraud]]></category>
		<category><![CDATA[intruders]]></category>
		<category><![CDATA[laptops]]></category>
		<category><![CDATA[Linux]]></category>
		<category><![CDATA[Norman]]></category>
		<category><![CDATA[Novell]]></category>
		<category><![CDATA[protection]]></category>
		<category><![CDATA[root kits]]></category>
		<category><![CDATA[servers]]></category>
		<category><![CDATA[spyware]]></category>
		<category><![CDATA[Trojans]]></category>
		<category><![CDATA[viruses]]></category>
		<category><![CDATA[Windows]]></category>
		<category><![CDATA[worms]]></category>

		<guid isPermaLink="false">http://blog.anta.net/?p=239</guid>
		<description><![CDATA[Intruders are the most successful in attacking all computers&#8212;not just home computers&#8212;when they use viruses and worms. Installing an anti-virus program and keeping it up to date is among the best defenses for your home computer. If your financial resources are limited, they are better spent purchasing a commercial anti-virus program than anything else. &#8212;&#8220;Home [...]<script type="text/javascript">SHARETHIS.addEntry({ title: "Antivirus + firewall = important", url: "http://blog.anta.net/2008/05/19/antivirus-firewall-important/" });</script>]]></description>
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		<title>Heise writer: Leopard firewall broken</title>
		<link>http://blog.anta.net/2007/10/31/heise-writer-leopard-firewall-broken/</link>
		<comments>http://blog.anta.net/2007/10/31/heise-writer-leopard-firewall-broken/#comments</comments>
		<pubDate>Wed, 31 Oct 2007 20:53:45 +0000</pubDate>
		<dc:creator>Thor Kottelin</dc:creator>
				<category><![CDATA[Internetworking]]></category>
		<category><![CDATA[Security]]></category>
		<category><![CDATA[firewalls]]></category>
		<category><![CDATA[Leopard]]></category>
		<category><![CDATA[MacOS]]></category>
		<category><![CDATA[vulnerabilities]]></category>

		<guid isPermaLink="false">http://blog.anta.net/2007/10/31/heise-writer-leopard-firewall-broken/</guid>
		<description><![CDATA[Jürgen Schmidt of Heise has tested the built-in firewall component of Apple’s new Mac OS&#160;X version&#160;10.5, also known as Leopard. Although Apple professes that Leopard is “safer by design” and “secure right out of the box”, Mr. Schmidt claims to have found a number of vulnerabilities. Leopard’s firewall is off by default, even if the [...]<script type="text/javascript">SHARETHIS.addEntry({ title: "Heise writer: Leopard firewall broken", url: "http://blog.anta.net/2007/10/31/heise-writer-leopard-firewall-broken/" });</script>]]></description>
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