[11639] in North American Network Operators' Group
Re: Implementing anti-abuse techniques on ISP networks....
daemon@ATHENA.MIT.EDU (Jon Lewis)
Wed Aug 6 19:21:01 1997
Date: Wed, 6 Aug 1997 19:09:15 -0400 (EDT)
From: Jon Lewis <jlewis@inorganic5.fdt.net>
To: Andy Pitts <andy@rbdc.rbdc.com>
cc: nanog@merit.edu
In-Reply-To: <199708062214.SAA25679@rbdc.rbdc.com>
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.
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