i'd love to find and block (via regex) more troyaned computers. i don't expect a real mailserver to work over a dynamic ip-address or not to have a properly configured reverse.
so if i could have a dns lookup of that IP i could do a simple regex check to refuse connection if it's a (dyn | no-ip | numeric triplet | etc) . like we do with HELO checks, but using the PTR for the connecting IP. with [Validate Sender / Reverse Lookup] we just verify that a valid PTR record is present. I think we could have a benefit verifying that ptr against a simply RegEx. [call me crazy, but i prefer to accept a connection from a no-ptr than from a 12.34.56.dyn.provider.net ] but maybe my second suggestion (regex for pre-data only) is easier to implement and could give even a greater benefit. ----- Original Message ----- From: "Fritz Borgstedt" <[EMAIL PROTECTED]> To: "Questions and Answers for users of ASSP Anti-Spam SMTP Proxy" <[email protected]> Sent: Monday, July 24, 2006 9:01 AM Subject: Re: [Assp-user] two ideas > >>1) getting the reverse for the connecting ip and verify via regex >>(ie. >>12.34.56.78 = 'c-68-47-30-116.hsd1.provider.net') so i can do a check >>like >>for helo (ie. >>^\d+\.\d+\.\d+\.\d+$|^[^\.]+\.?$|\d{1,3}(\.|-|x)\d{1,3}(\.|-|x)\d{1,3} >> ) > > I do not really unterstand what you want to do. > > > > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share > your > opinions on IT & business topics through brief surveys -- and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > Assp-user mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/assp-user > ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Assp-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/assp-user
