Any modsecurity gurus on the list?

I run many moinmoin wikis on my underpowered virtual server.
Lately, I have seen the load average climb towards 80 (!) when
the bots are attacking.  95% of the attempts are associated
with html GET and POST requests for three actions: "phpMyAdmin"
(which I don't run), newaccount, and login.

It looks like modsecurity for apache is the right way to
process these, but I don't have much time to learn about it. 
I've found some old howtos.  They don't tell me how to do
what I want, which is more than just make a decision to
proceed based on a single isolated request.

What I think I want to do is append the offending IP addresses
into /etc/hosts.deny , like I do with denyhosts for sshd.
hosts.deny is light-weight compared to firing up apache
and moinmoin for each query.

Perhaps I can detect the above three text patterns, with
some kind of rate limit.  Say 3 attempts from a given IP
address to phpMyAdmin or newaccount within one hour (some
may be honest mistakes), 10 attempts to login (some may
be legitimate).   But how?

Keith

-- 
Keith Lofstrom          [email protected]
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