Re: Implementing anti-abuse techniques on ISP networks....
I don't know about the "huge players", but we're an Internet Service Provider, not an Internet Blockage Provider. We don't allow spoofing, and we don't allow relaying, but we're not about to put filters to prevent dialup customers from connecting wherever they want.
I too, am a small Internet Service Provider, and I too, don't want to block sites that my users may want to access. But there seems to be a few domains that do nothing but generate spam. Am I not providing a service to my users if I prevent them from being smothered with spam from those sites? -- Andy Pitts : "Knowledge is a deadly friend andy@rbdc.rbdc.com : When no one sets the rules." http://www.rbdc.com : --King Crimson--
On Wed, 6 Aug 1997, Andy Pitts wrote:
I too, am a small Internet Service Provider, and I too, don't want to block sites that my users may want to access. But there seems to be a few domains that do nothing but generate spam. Am I not providing a service to my users if I prevent them from being smothered with spam from those sites?
The issue is that there are ISPs that have filters such that their dialup customers cannot talk to port 25/tcp of systems elsewhere on the net. Customers have to use the provider's SMTP servers. The question is, is this a good thing? I don't think anyone would argue against UUNet and PSI doing this with the *.ms.uu.net dialups or the *.pub-isp.psi.net...but would you do this on your own network? I've blocked 4 ms.uu.net /16's and 12 pub-isp.psi.net /24's from talking directly to FDT's mail servers. Unfortunately, most of the junk from PSI is relayed through other sites anyway. ------------------------------------------------------------------ Jon Lewis <jlewis@fdt.net> | Unsolicited commercial e-mail will Network Administrator | be proof-read for $199/message. Florida Digital Turnpike | ______http://inorganic5.fdt.net/~jlewis/pgp for PGP public key____
[ On Wed, August 6, 1997 at 19:09:15 (-0400), Jon Lewis wrote: ]
Subject: Re: Implementing anti-abuse techniques on ISP networks....
The issue is that there are ISPs that have filters such that their dialup customers cannot talk to port 25/tcp of systems elsewhere on the net. Customers have to use the provider's SMTP servers. The question is, is this a good thing? I don't think anyone would argue against UUNet and PSI doing this with the *.ms.uu.net dialups or the *.pub-isp.psi.net...
... and Earthlink, and Netcom, and Worldnet, and all the rest, and yes, that's exactly what I'm getting at! ;-)
but would you do this on your own network?
One of the first installed, most common, and most often requested filters for firewalls I help design, configure, debug, and install, etc. for small and large corporate networks is one to prevent all internal hosts but the mail gatetway from making outbound connections on port 25. To them it's just as important as having coporate paper-based communications go out on corporate letterhead (though of course the degree of control it affords is far more insidious! ;-). -- Greg A. Woods +1 416 443-1734 VE3TCP <gwoods@acm.org> <robohack!woods> Planix, Inc. <woods@planix.com>; Secrets of the Weird <woods@weird.com>
On Wed, 6 Aug 1997, Andy Pitts wrote:
I don't know about the "huge players", but we're an Internet Service Provider, not an Internet Blockage Provider. We don't allow spoofing, and we don't allow relaying, but we're not about to put filters to prevent dialup customers from connecting wherever they want.
I too, am a small Internet Service Provider, and I too, don't want to block sites that my users may want to access. But there seems to be a few domains that do nothing but generate spam. Am I not providing a service to my users if I prevent them from being smothered with spam from those sites?
Of course. If it's your mail server you can decide what sites it will accept mail from. But will you also use router access lists to prevent your users from connecting to wherever and whatever they want? Two separate issues. Bill
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