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Date:      Fri, 06 Aug 2004 18:31:51 -0400
From:      Forrest Aldrich <forrie@forrie.com>
To:        freebsd-ipfw@freebsd.org
Subject:   Blocking SMTP traffic based upon RBL....
Message-ID:  <411406D7.2000808@forrie.com>

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There are probably dangerous consequences to doing something like this
improperly; however, there is a project out there called PacketBL:

http://wiki.duskglow.com/index.php/Packetbl

It's for Linux only, unfortunately -- however I like the idea.   It
interfaces with the packet filtering system and selectively blocks SMTP
(port 25, configurable) traffic based upon RBLs etc.

I wonder if there is a similar way to accomplish this with FreeBSD/ipfw...







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