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RE: Spyware
From: "Gross Barry D." <bd.gross () hosp wisc edu>
Date: Wed, 15 Dec 2004 13:08:54 -0600

a lot of the spyware I have had the fortune to troubleshoot uses http to
phone home


-----Original Message-----
From: Matt Stern [mailto:sternm () comprehensive com] 
Sent: Tuesday, December 14, 2004 4:38 PM
To: security-basics () lists securityfocus com
Subject: Spyware

Hello all:

I was just wondering if spyware sends its answers "back home" on any 
particular TCP or UDP port.  If so, then couldn't I doubly safeguard the

LAN (after trying to keep all the spyware off the workstations) by 
disallowing outbound communications via the firewall, for those ports? 
 Or conversely, instead of allowing all outbound traffic, only allow the

usual ports, such as 80, 443, 23, etc?


Matthew H. Stern, CCP/CDP, sternm () comprehensive com
Serving the IT industry since 1976
Comprehensive Computer Services Inc.
Phone: 631 755-2250, Fax 755-2254
560 Broad Hollow Road, Melville NY 11747

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