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Re: Re[2]: 11 years of inetd default insecurity?
From: psz () maths usyd edu au (Paul Szabo)
Date: Tue, 9 Sep 2003 05:11:12 +1000 (EST)

3APA3A <3APA3A () SECURITY NNOV RU> wrote:

-R 0 -s your_ad_can_be_here

Your  cure  is  worse  than  the disease: rate limiting allows a DoS
against  the  service,  no  limit  allows  a  DoS  against the whole
machine.

-s limits number of processes invoked from same IP. You can additionally
use  -c  to  prevent distributed attack. It doesn't allow to DoS box and
doesn't disable service for 10 minutes.

Note that my (DEC/Compaq/HP Tru64) inetd does not have -c or -s options.
The only safe way is to use a sensible -R and tcp_wrappers. Or upgrade to
Linux and xinetd...

Cheers,

Paul Szabo - psz () maths usyd edu au  http://www.maths.usyd.edu.au:8000/u/psz/
School of Mathematics and Statistics  University of Sydney   2006  Australia


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