Re: Spammers hapless fate = ISP toil and sweat
- Date: Fri, 19 Sep 1997 15:06:56 +0100
- Resent-date: Fri, 19 Sep 1997 17:15:26 +0200
- Resent-message-id: <9709191515.AA29667@localhost
At 10:20 19-09-1997 +0200, Mickey Coggins wrote:
>One thing we should keep in mind when implementing anti-spam
>solutions is to not try to solve the problem like was done with
>news.
>
>Since people started rejecting massive cross-postings, the spammers
>just sent a new article to each of the groups. Most of the spam
>is binary pictures trying to attract people to their site, so the
>amount of news traffic skyrocketed with dozens of copies of the
>same stuff. Score: spammers 1
> isps 0
Well, in this case and in what it concerns Esoterica, its spammers 0 -
isp -1
We have a filter on incoming articles that not only detects ECP ( Excessive
Crossposting) but also detects EMP (Excessive Multi Posting). By maintining
a list of the last 5000 or 6000 articles, we can check using Subject,
Lines and
From headers if there's a repetition of the same article being sent to
several
newsgroups; if it is, we refuse the article.
Since we're a node of Usenet II, this is indeed mandatory for the net.*
hierarchy
This filter is refusing something like 50000 articles per day.
( Does it show that I, as postmaster/newsmaster of Esoterica, have a thing
with spammers ? I guess it does :-)
C U!
-- Mario Valente
