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)
Re: spambots and dictionary attacks Nov 22 2006 05:30PM
Kurt Seifried (bt seifried org) (2 replies)
> Greylisting is a two-edged sword, though, that may not only cause
> noticable delays in mail delivery, but also legit mails to be rejected.

Only for the first email if the greylisting system has any sense (i.e.
OpenBSD's spamd), plus most allow whitelisting.

> 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.

Sure and then the hosts are behaving like real email servers which is vastly
more expensive (computationally/etc.) than just blasting stuff out. If my
OpenBSD spamd delays delivery for 4 hours that gives my other defenses 4
hours to react (i.e. for blacklists to be updated, whatever). We're never
going to have 100% effective anti spam solutions, but that's no reason to
give up. I'd rather get 2-3 spams a day than 1000.

> Regards
> Ansgar Wiechers

-Kurt

[ reply ]
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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