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	<title>Sys Admin Guides, How To&#039;s, etc  by Marios Maravelias &#187; if</title>
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		<title>How to check if some one is spamming from my server (Linux Plesk 8.x)</title>
		<link>http://www.sys-admin.gr/53/security/how-to-check-if-some-one-is-spamming-from-my-server-linux-plesk-8x/</link>
		<comments>http://www.sys-admin.gr/53/security/how-to-check-if-some-one-is-spamming-from-my-server-linux-plesk-8x/#comments</comments>
		<pubDate>Tue, 13 Nov 2007 12:19:07 +0000</pubDate>
		<dc:creator>MaRiOs</dc:creator>
				<category><![CDATA[Mail Server]]></category>
		<category><![CDATA[Security]]></category>
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		<guid isPermaLink="false">http://www.sys-admin.gr/archives/security/53</guid>
		<description><![CDATA[If you see a lot of smtp connections or your server gets constantly in spam black lists, maybe you should check if some bot spams through your server. The are 2 cases of spamming through a box: 1)using unsecure php forms that bots abuse 2)using smtp connection from an outside client this artice is about [...]]]></description>
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		<title>Checking if a server is under ddos attack</title>
		<link>http://www.sys-admin.gr/32/security/checking-if-a-server-is-under-ddos/</link>
		<comments>http://www.sys-admin.gr/32/security/checking-if-a-server-is-under-ddos/#comments</comments>
		<pubDate>Mon, 04 Jun 2007 13:39:02 +0000</pubDate>
		<dc:creator>MaRiOs</dc:creator>
				<category><![CDATA[Network]]></category>
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		<guid isPermaLink="false">http://www.sys-admin.gr/archives/security/32</guid>
		<description><![CDATA[A quick and usefull command for checking if a server is under ddos is: netstat -anp &#124;grep &#8216;tcp\&#124;udp&#8217; &#124; awk &#8216;{print $5}&#8217; &#124; cut -d: -f1 &#124; sort &#124; uniq -c &#124; sort -n That will list the IPs taking the most amount of connections to a server. It is important to remember that the [...]]]></description>
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