Tom Lane wrote:
> nolan@celery.tssi.com writes:
> > Also, I DO run spamassassin here, and it is finding only perhaps 10-20%
> > of the copies of the most recent worm. I think it sends out copies that
> > are sufficiently different from each other that it bypasses all the
> > checks, including a Bayesian filter.
>
> Hmm. I've had no trouble filtering the actual worm (I filter using a
> pattern that looks for the first few bytes of a base64-encoded Windows
> executable file). The only copies that were getting as far as my spam
> inbox were ones that had had the executable file removed by various
> "helpful" filtering programs.
Rather than configuring my filter for every virus, I just block evil
attachments via procmail:
* ^(Content-Type: [^;]*;| )? *(file)?name="?[^"]*\.(exe|com|pif|scr|bat)"?$
One interesting modification I have is that once I recieve a virus
email, I block further emails from that host. Yea, it could block later
valid email, but preventing all those viruses from being downloaded
before being checked is worth it.
--
Bruce Momjian | http://candle.pha.pa.us
pgman@candle.pha.pa.us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073