Focus on Linux
RE: spambots and dictionary attacks Nov 20 2006 11:17PM
Steven Jones (Steven Jones vuw ac nz) (2 replies)
Re: spambots and dictionary attacks Nov 22 2006 08:36AM
rowland onobrauche (rowland onobrauche legendplc com)
Re: spambots and dictionary attacks Nov 21 2006 11:04PM
Ansgar -59cobalt- Wiechers (bugtraq planetcobalt net) (1 replies)
On 2006-11-21 Steven Jones wrote:
> Most attacks these days seem (vastly) distributed, the most effective
> thing I have found is to use grey listing as this stops 99%+ of botnets
> dead, they simply do not re-try the connection later. Personally I have
> found no other technique as effective.

Greylisting is a two-edged sword, though, that may not only cause
noticable delays in mail delivery, but also legit mails to be rejected.
Not to mention that it'll stop working as soon as it's being used widely
enough to make adjusting to it worthwhile to spammers.

Regards
Ansgar Wiechers
--
"All vulnerabilities deserve a public fear period prior to patches
becoming available."
--Jason Coombs on Bugtraq

[ reply ]
Re: spambots and dictionary attacks Nov 22 2006 05:30PM
Kurt Seifried (bt seifried org) (2 replies)
Re: spambots and dictionary attacks Nov 23 2006 06:01PM
Ansgar -59cobalt- Wiechers (bugtraq planetcobalt net)
Re: spambots and dictionary attacks Nov 23 2006 05:40PM
Devdas Bhagat (devdas dvb homelinux org)


 

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