[Dshield] Firewall/Spam defense

David C. Hart DavidHart at TQMcube.com
Thu Oct 23 12:51:48 GMT 2003


On Wed, 2003-10-22 at 19:17, John D. wrote:
> >Hello, 
> >
> >In lieu of the recent RBL issues, I've recently started a research project 
> >on controlling spam via the firewall.  My research involves finding DHCP or 
> >dial-up ip addresses and blocking the for a period of time if the ip 
> >registers a connect on port 25. 
> 
It's unnecessary if you have other systems in place. You might want to
consider two instances of Postfix. BTW, I suspect that this would be
handled better by creating a zone in Bind than using the firewall,
essentially creating your own internal RBL.
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