Date: Sun, 26 Sep 1999 13:40:36 -0400 From: "Gary Palmer" <gjp@in-addr.com> To: Alex Zepeda <jazepeda@pacbell.net> Cc: current@FreeBSD.ORG Subject: Re: On hub.freebsd.org refusing to talk to dialups Message-ID: <64194.938367636@noop.colo.erols.net> In-Reply-To: Your message of "Sun, 26 Sep 1999 10:22:45 PDT." <Pine.BSF.4.10.9909261017060.367-100000@localhost>
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Alex Zepeda wrote in message ID <Pine.BSF.4.10.9909261017060.367-100000@localhost>: > No, the real problem is the ISPs who can't fund decent servers and provide > decent service. If they could take care of spam and provide a 99% > reliable service, I'd have very few problems with using their mailservers. If they can't provide a reliable OGM server, find a different ISP, no matter what else. And I fail to see how they can `take care of spam' if you won't let them close it at the source ... people doing direct injection of spam to the recipients MX and relay raping others to hide their tracks. ISPs blocking outbound port 25 from dynamic dialups and inbound port 25 to people who shouldn't be running servers (e.g. your average cablemodem customer, a fair number of whom run open relays, and most of whom have a TOS which doesn't allow them to run `servers' in the first place) will cure a lot of problems, whether you like it or not. More than 75% of ISP customers would like less spam ... but they *have* to be willing to accept that to stop the spammer they may have to jump through a new hoop. Heck, I believe a UK company (FreeServe?) uses a L4 switch (or some similar technology) to redirect >all< outbound port 25 traffic to their SMTP servers. US ISPs probably don't have that choice if they cover any territory at all (the cost of the switches becomes prohibitive as you need one per POP), but a Cisco ACL would work just as well at stopping the problem. A growing number of companies block dynamic dialup blocks from connecting to their inbound mail servers. We do it by TCP wrapping sendmail and doing wildcard matching of hostnames. Other people use the MAPS DUL or the (now, and probably temporarily, dead) IMRSS DSSL. So even if your ISP does let port 25 out, its usefulness is *very* shortlived. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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