Date: Thu, 28 May 1998 07:37:39 -0700 (PDT) From: David Wolfskill <dhw@whistle.com> To: isp@FreeBSD.ORG Subject: Re: Changes to /etc/mail/sendmail.cf.additions Message-ID: <199805281437.HAA09703@pau-amma.whistle.com>
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>Date: Wed, 27 May 1998 18:47:24 +0100 (BST) >From: Scot Elliott <scot@poptart.org> >On the subject of the new Sendmail version... anyone know if there are >nice M4-features/hacks that let you just turn relaying etc on/off with >just a simple line in your .mc file? I haven't had a chance to look at it >yet... fiddling with sendmail rules scare the hell out of me to be honest The Web page at http://www.sendmail.org/ has a pointer to Claus Assman's page, which has information on his anti-relaying rulesets (which are enabled by specifying the appropriate "hacks" in your .mc file). Please note that they are designed to work with sendmail 8.x earlier than 8.9; 8.9 has built-in anti-relay features. (In fact, it doesn't relay by default.) I strongly recommend that .cf files should only be generated (via "make") from a corresponding .mc file (and the requisite tree of .m4 files, of course) -- I've managed to use the approach successfully for the last 4+ years: treat the .mc files as "source" and .cf files as "object". And as a slight tangent: I recently had occasion to notice that sendmail can be compiled with support for using "libwrap" from Wietse Venema's TCP wrappers package. I built sendmail 8.8.8 with this support (on my home machine), and am thus able to prevent spammers from connecting to its SMTP port.... The attempts are logged, and I send nastygrams to appropriate folks.... david -- David Wolfskill UNIX System Administrator dhw@whistle.com voice: (650) 577-7158 pager: (650) 371-4621 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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