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Blocking mass mailings caused by viruses

from [Erdahl, Larry E] Network Security [Permanent Link]
Subject: Blocking mass mailings caused by viruses
Date: Wed, 12 Oct 2005 10:31:06 -0500 
 

Over the past month we've been blacklisted by Spamhaus several times
because of infected workstations and laptops (contractors and
consultants) sending out mass mailings.
My management doesn't want to block port 25 because we have a handful of
physicians who are using POP mail. Does anyone know of an IDS, IPS,
firewall, router ACLs, etc... that will block outgoing SMTP traffic,
based on abnormal traffic volume? 

Thanks in advance!
 
Larry E. Erdahl
IS Security Specialist
Allina Hospital & Clinics
Office (612)775-1273
Cell   (612)804-7324  
larry.erdahl@allina.com
 


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