Date: Mon, 14 Dec 1998 13:00:38 -0600 (CST) From: Kevin Day <toasty@home.dragondata.com> To: dbabler@Rigel.orionsys.com (David Babler) Cc: freebsd-isp@FreeBSD.ORG Subject: Re: sendmail morons Message-ID: <199812141900.NAA23537@home.dragondata.com> In-Reply-To: <Pine.BSF.4.05.9812141052240.19642-100000@Rigel.orionsys.com> from David Babler at "Dec 14, 1998 10:56:23 am"
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> > > On Sun, 13 Dec 1998, Kevin Day wrote: > > > > > Somehow, we're on some spam software's list of open relays, I think. We > > aren't open to relaying, but people sure try. > > > > I'm guessing this is a bug in the software, but... when it can't relay, it > > leaves the connection open, then goes and tries again, and again..... > > > > root 14170 0.0 1.2 636 736 ?? I 11:47PM 0:00.02 > sendmail: server guy78@van-wa1-17.ix.netcom.com [205.184.177.49] cmd read > (sendmail) > > In addition to cutting down the delay time and blocking the IP range as > others have suggested, this is coming from a Netcom dialup in Vancouver, > Washington. There aren't all THAT many dialup ports there, so finding the > clueless moron won't be difficult - call Netcom and report a network > security problem and DoS (which this is) and have the bozo nuked. > > -Dave > > I've dropped down the timeouts, and I've blocked IP's... However... I must be on some list somewhre, as we get 20-30 people a day doing this to us, all from different dialups/providers. I'm thinking about hacking sendmail to drop the connection after it says 'relay not permitted' so they don't hang on like this. Kevin To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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