Date: Sun, 28 Sep 1997 01:33:57 +0200 (MET DST) From: Eivind Eklund <perhaps@yes.no> To: Brian Somers <brian@awfulhak.org> Cc: bruce@zuhause.mn.org, freebsd-questions@FreeBSD.ORG Subject: Re: sendmail and ppp -auto Message-ID: <199709272333.BAA13407@bitbox.follo.net> In-Reply-To: Brian Somers's message of Tue, 23 Sep 1997 23:48:04 %2B0100 References: <199709231400.JAA02114@zuhause.mn.org> <199709232248.XAA07776@awfulhak.demon.co.uk>
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> > > I just started using ppp -auto, and whenever sendmail starts up or I > > get any new mail, ppp connects to my ISP. How do I trace this? I > > don't know how. Is there something I should add to my sendmail > > configuration? For that matter, how do I attach bpf0 to tun0, and where > > is documentation on setting up ipfilters to reject the packet sendmail > > is sending? Would it help to set up a caching named? > > There's a bit in the FAQ now (in the networking section - 10.7.9 > currently). > > Essentially, you need to "set log +tcp/ip", determine the rogue > program (sendmail in your case) and add a few lines to ppp.conf: > > set dfilter 1 deny udp src eq 25 > set dfilter 2 deny udp dst eq 25 > set dfilter 3 permit 0/0 0/0 Eh - this looks completely bogus to me. set dfilter 1 deny udp src eq 53 set dfilter 2 deny udp dst eq 53 set dfilter 3 permit 0/0 0/0 would be it, wouldn't it? But - this denies all DNS requests the ability do dial out. Not Good. It is much better to fix sendmail (and Win95). Eivind.
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