Monthly Archives: February 2012

Detecting the source of a DOS attack with Cisco Netflow

Posted on February 13, 2012 by danmassey99

A very late night call last night/this morning was a support ticket for a none responsive LNS (L2TP Network Server). The LNS normally terminates around 1000 VPDN sessions but was dropping just about all the traffic. A cursory glance at … Continue reading →

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Using a RAMdrive with MIMEDefang on FreeBSD

Posted on February 7, 2012 by danmassey99

Before I deploy the new spam scanning servers which run a combination of: Sendmail MIMEDefang SpamAssassin Milter-Greylist I’d like to set the spool directory to run on a ramdrive to increase the speed an efficiency of the system. When MIMEDefang … Continue reading →

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MySQL innodb buffer pool size issues

Posted on February 5, 2012 by danmassey99

I’m currently archiving some database records from our AVS logging platform. My previous technique was to rename the logging table and create a new one, leaving the renamed table to be cut up as required.  I had to do it … Continue reading →

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MIMEDefang – processing the valid users list ( filter_recipient() )

Posted on February 5, 2012 by danmassey99

I’m rebuilding our spam scanning platform at the moment and making some changes/improvements along the way. One of our issues was that we want to show customers ‘just how bad it is’ without spam scanning and so would like to … Continue reading →

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