Date: Sun, 8 Feb 1998 23:05:31 -0800 (PST) From: Doug White <dwhite@gdi.uoregon.edu> To: Jason Korkin <thekork@xtdl.com> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: QUESTION: How do I turn off sendmail relaying? Message-ID: <Pine.BSF.3.96.980208230334.24904t-100000@gdi.uoregon.edu> In-Reply-To: <34DB54A7.9EA88605@xtdl.com>
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On Fri, 6 Feb 1998, Jason Korkin wrote: > Hi, > We are having a huge problem with people using our host as a relay > when spamming accross the net... I have 2 questions, (1) how can I turn > off relaying so that they wont be allow to bounce off of our server, (2) > how can I only allow people to access our mail server from only our > domain (xtdl.com). > > # uname -a > FreeBSD user.xtdl.com 2.1.0-RELEASE FreeBSD 2.1.0-RELEASE #0 For (1), on 2.2.5 and later machines, we have a /etc/mail/ directory that contains patches to make Sendmail reject relays. You have to be running Sendmail 8.8.x for it to work. I'll attach a .tar.gz of the directory, primed with some domains and IPs to block, via private mail. You *MUST* be running 8.8.x or later of sendmail; others will barf. For (2), see `man ipfw'. Doug White | University of Oregon Internet: dwhite@resnet.uoregon.edu | Residence Networking Assistant http://gladstone.uoregon.edu/~dwhite | Computer Science Major To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe questions" in the body of the message
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