From owner-freebsd-questions Wed Aug 26 10:20:19 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id KAA07259 for freebsd-questions-outgoing; Wed, 26 Aug 1998 10:20:19 -0700 (PDT) (envelope-from owner-freebsd-questions@FreeBSD.ORG) Received: from pau-amma.whistle.com (s205m64.whistle.com [207.76.205.64]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id KAA07254 for ; Wed, 26 Aug 1998 10:20:18 -0700 (PDT) (envelope-from dhw@whistle.com) Received: (from dhw@localhost) by pau-amma.whistle.com (8.8.8/8.8.7) id KAA28101; Wed, 26 Aug 1998 10:18:43 -0700 (PDT) (envelope-from dhw) Date: Wed, 26 Aug 1998 10:18:43 -0700 (PDT) From: David Wolfskill Message-Id: <199808261718.KAA28101@pau-amma.whistle.com> To: freebsd-questions@FreeBSD.ORG, pat.groce@state.sd.us Subject: Re: SPAM HELP In-Reply-To: <5D2C95997022D21187350008C7F4CF7902EDFB@ESPR1SRV5> Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG >From: pat.groce@state.sd.us >Date: Wed, 26 Aug 1998 11:15:43 -0500 >Our freebsd box is currently being used for redirected spam messages. >Sometimes 6000-7000 messages a day! Any idea on how i can prevent this? >Is there a web page or other resource covering this topic? On >freebsd.org i found some stuff on filtering inbound spam but nothing on >this redirection problem. Either upgrade to sendmail 8.9.1 (note that you'll need to explicitly specify machines for which you *want* to relay mail), implement Claus Assman's anti-relaying rulesets (this is what I did at home, running sendmail 8.8.8), or implement a different MTA that handles the non-relaying. In addition to these, you might want to consider implementing Wietse Venema's "TCP Wrappers" package. In particular, sendmail can be compiled with support to make use of the TCP Wrappers libraries, and thus log "interesting" events. (I also did this at home.) 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-questions" in the body of the message