On Wed, Aug 31, 2011 at 12:17 PM, John R Pierce <pie...@hogranch.com> wrote:
>> Wrong. Some can be determined by machine searching for 'known' invalid
>> URL strings which are not remotely similar to valid web page names.
>
> there's an infinite number of invalid strings, and only a finite number
> of valid ones.
>
> anyways, your webserver already filters these out, its not going to
> respond to an invalid URL with anything other than '404'.  thats its job.

The idea isn't as crazy as it sounds - expensive firewalls offer the
option to block URLs including known exploits and it is a much faster
way to protect a farm of servers behind it than waiting for the OS
vendor to come up with a service pack to make the servers less
vulnerable.

-- 
  Les Mikesell
   lesmikes...@gmail.com
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