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RE: Protecting Multiple Public IP Workstations
From: "Preston, Tony" <Tony.Preston () acs-inc com>
Date: Tue, 02 Mar 2004 08:31:58 -0500

I have a linksys router and have a question...  It has a minimal port
filtering capability.  I block a couple of ports (135-139, 445), and
wondered what would be a suggested list of ports to block traffic based on
known virus/trojans.

Tony Preston
Systems Engineer, AS&T Inc.
Division of L3 Corporation
(609) 485-0205 x 181


-----Original Message-----
From: Paul Kurczaba [mailto:paul () myipis com] 
Sent: Friday, February 27, 2004 7:52 PM
To: MATT GIBSON; security-basics () securityfocus com
Subject: Re: Protecting Multiple Public IP Workstations

First of all, it's never a good idea to assign public IP's to workstations
on a networked environment (this type of environment is a hackers wish come
true). If you are not hosting services on all six IP's, you can buy a
$100-$150 firewall/router at compusa (I would recommend Linksys or Netgear).
Most have 4 or 8 ports. If the firewall/router you buy only has 4 ports,
also pick up a 4 port switch (it's about $50-$70). If you need all 6 IP's
(for hosting HTTP, FTP, SMTP, etc.), you should probably get a CheckPoint
FW-1 or a Cisco PIX. Also, if you havn't already bought the Win2k server, I
would suggest Server 2003 instead. It takes less than 10 seconds to boot,
the OS is faster, and more secure than 2000.

just my $0.02

-Paul Kurczaba


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