ISP port blocking practice
johnl at iecc.com
Thu Sep 9 18:33:26 UTC 2010
>That's really the question at hand here -- whether or not there's any
>benefit to continuing the "never ending arms race" game. Some people
>think there is. Others question whether anything is really being
>accomplished. Certainly we're playing it out like an arms race -- ISPs
>block something, spammers find a new way to inject spam, and so on.
>The end result of lots of time spend on blocking thins, less
>functionality for customers ... but no decrease in spam.
I take it you've never run a mail system other than perhaps a tiny one
for your friends. The alternative to the arms race is to abandon
>The theory behind closing open relays, blocking port 25, etc., seems to
>(a) That will make it harder on spammers, and that will reduce spam --
>some of the spammers will find other other ways to inject spam, but
>some will just stop, OR
>(b) Eventually, we'll find technical solutions to *all* the ways spam
>is injected, and then there will be no more spam.
Interesting guesses, but wrong.
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