bzs: ok, this botnet was used in a DoS attack but I think it
underscores the general theme that they exist, are dangerous, numbers
of PCs involved (20,000 in this case), and becoming legally dangerous
to their operators.)
It also underscores why "block port 25" won't solve the zombie problem,
"block port 25" is a delusion, unless it's a temporary step in a strategy
to find and clean (multi-) infected systems.
It's not a solution for the DDOS problem, but it definitely would make a
massive dent in the spam problem (or at least force spammers into some other
tactic; of course you'll tell us what that would be, right?)
Larry Seltzer
eWEEK.com Security Center Editor
http://security.eweek.com/
http://blog.ziffdavis.com/seltzer
Contributing Editor, PC Magazine
larryseltzer(_at_)ziffdavis(_dot_)com
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