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RE: Mail relay attempts



 
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If you use Iptables and you block spoofed addresses with Iptables,
will that stop the spoofing in their tracks, therefore decreasing the
chance of a DOS?  

Sincerely,

Daniel J. Rychlik
" Money does not make the world go round , Gravity does ."



- -----Original Message-----
From: Rolf Kutz [mailto:kutz@netcologne.de] 
Sent: Thursday, August 29, 2002 5:18 AM
To: Debian-Security@Lists. Debian. Org
Subject: Re: Mail relay attempts


* Quoting Jones, Steven (sjones08@eds.com):

> Ive found port sentry really good for detecting port scans and then
>  routeing the return packets to no where.

That makes you open to DoS-Attacks. Someone could
scan you with spoofed source-IP and disconnect
your box. A tarpit is a much better aproach than a
(dynamic) blocklist.

- - Rolf


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