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RE: Filtering SPAM with Linux
From: "Wayne Ash" <wayne () ibsinfotech com au>
Date: Wed, 28 Apr 2004 10:18:30 +1000

Ivan,

If you wish to have a simple solution, install postfix and enable the
maps_rbl_list command to lookup the connecting mail server for
blacklisting.

(this assumes you have exchange 2000 installed, as exchange 2003
supports RBL blacklisting)

When enabled this will reduce your spam, and if you are still not happy
then enable SpamAssassin.

Wayne


-----Original Message-----
From: Chris Santerre [mailto:csanterre () MerchantsOverseas com] 
Sent: Wednesday, 28 April 2004 3:56 AM
To: 'ivan.hernandez () globalsis com ar'; security-basics () securityfocus com
Subject: RE: Filtering SPAM with Linux



-----Original Message-----
From: ivan.hernandez () globalsis com ar
[mailto:ivan.hernandez () globalsis com ar]
Sent: Tuesday, April 27, 2004 10:29 AM
To: security-basics () securityfocus com
Subject: Filtering SPAM with Linux


Hello. I have a box with linux that is acting as NAT and Firewall (also

cache with squid and reverse proxy with pound).
I have an internal MS Exchange server that goes to internet via NAT, 
and i dont have any chance of removing it, but i would like to filter 
the incoming traffic to remove spam.
My net looks something like this:


INTERNET <---> x.x.x.x LINUX BOX 10.1.20.100 <---> 10.1.20.1 MS 
Exchange

What can i use in the linux box? I have found things like MessageWall 
and so, but i need better recomendations from people that already doed 
it.

Thanks!!
Ivan Hernandez


You want to use SpamAssassin. Here are some links:

www.spamassassin.org
www.rulesemporium.com
www.exit0.us
http://wiki.apache.org/spamassassin/
www.surbl.org
http://news.gmane.org/gmane.mail.spam.spamassassin.general

Hope that Helps,

Chris Santerre
System Admin and SARE Ninja
http://www.rulesemporium.com
'It is not the strongest of the species that survives, not the most
intelligent, but the one most responsive to change.'
Charles Darwin Charles Darwin 

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Ethical Hacking at the InfoSec Institute. Mention this ad and get $545 off
any course! All of our class sizes are guaranteed to be 10 students or less
to facilitate one-on-one interaction with one of our expert instructors.
Attend a course taught by an expert instructor with years of in-the-field
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of an Ethical Hacker to better assess the security of your organization.
Visit us at:
http://www.infosecinstitute.com/courses/ethical_hacking_training.html
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