Florian Stoehr said:

>Can anyone recommend a package here / solutions here? Or, on the other 
>hand, is it possible to find out the address range of a provider (for 
>blocking IP-based in ipf then).

Ipfilter works great for blocking spam/whatever at the IP level. I've been
doing just that since NetBSD 1.4.
-- 
Rick Kelly  rmk@rmkhome.com  www.rmkhome.com