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Help Needed With DoS Attack



Hello,

a webserver is under attack.

What's required is some kind of filtering software and a firewall that
could do the following:

pass only valid HTTP GET requests and block all other HTTP methods (PUT,
OPTIONS, CONNECT, etc.), possibly validate HTTP GET requests by matching to
local paths;
optionally disable HTTP 1.1 requests;
block excessively long URLs;
have an extensions whitelist/blacklist;

the firewall would have to have an option to auto-ban for flooding, and
restrict the simultaneous number of requests/connections from a single IP.

++++++++++++++++++++++++++++++++++++++++++++++++

     Not far from here, by a white sun, behind a green star, lived the 
Steelypips, illustrious, industrious, and they hadn't a care: no spats 
in their vats, no rules, no schools, no gloom, no evil influence of the 
moon, no trouble from matter or antimatter -- for they had a 
machine, a dream of a machine, with springs and gears and perfect 
in every respect. And they lived with it, and on it, and under it, and 
inside it, for it was all they had -- first they saved up all their atoms, 
then they put them all together, and if one didn't fit, why they 
chipped at it a bit, and everything was just fine... 

-- Stanislaw Lem, "Cyberiad"



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