More on spamming..

Good morning from Germany,

At 02:43 01.10.97 +0200, Geert Jan de Groot wrote:
>
>People may be interested to read http://maps.vix.com. It is my understanding
>that this list is also available as a BGP4-feed, so that you
>can build a blacklist that automatically adjusts to the spammer's
>moves.
>
>This adds more thrust to the effort and keeps support staff costs low
>(much lower than maintaining a list manually at least).

But, the customers of the ISPs behind this IPs aren't not only spammers.
We (Europe ISPs/Local Registries/Local Providers etc.) must begin a
discussion, how we can stop those spammers.
I think, it's not a solution to build a frontier to the ISPs who are
housing such spammers. We must stop those spammers with commercial ideas
not with technical solutions such as filtering out IPs with as-path access
lists.

One (technical) idea can be, to install two smtp server:
One, who can only receive mails for known domains and IPs.
This SMTP Server use second relay smtp server for delivering the mails to
the customers.
Customers, especially dial-up customer or uucp-feeds) use this second smtp
server for sending mails out.
The second smtp server checks a known domain/ip  list, only those
domains/IPs can send mail through this relay.

For the first smtp server anyone can use qmail (http://www.qmail.org/),
which has an anti-spam filter (checking some to:/from:/sender:-addresses,
so the first smtp server can be used as a filter for customer spamming and
don't function as relay for spammers.

we're installing in the next weeks such a smtp hirarchie for our servers.

we're using qmail for our smtp servers, 'cause it's not mentioned in the
CERT advisories I've read.

Kind regards,
	sh


-- 
Stephan Hermann, techn. Leiter Netzwerk u. Telekommunikation	eMail: sh at nwu.de
NWU Gesellschaft fuer Netzwerke und Telekommunikation mbH	Tel.:
+49-231-9860143
Heinrichstr. 51, 44536 Luenen					FAX : +49-231-9860148
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 355 bytes
Desc: not available
URL: <https://www.ripe.net/ripe/mail/archives/lir-wg/attachments/19971001/560acec2/attachment.sig>