How to disable web accelerators

I am not sure if this is the right place to ask or not. How
do I go
about disabling the use of web accelerators like FasterFox
or the Google
Web Accelerator? I have noticed that several sites now have
a warning pop
up if you are using such a device and refuse you access
until it is
turned off.


-- 
Gerard Seibert
gerardseibercom.net


Vini, vidi, velcro...
I came, I saw, I stuck around

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Hi,

On Friday 28 July 2006 00:24, Gerard Seibert wrote:
> I am not sure if this is the right place to ask or not.
How do I go
> about disabling the use of web accelerators like
FasterFox or the Google
> Web Accelerator? I have noticed that several sites now
have a warning pop
> up if you are using such a device and refuse you access
until it is
> turned off.

In addition to the User-Agent blocking already proposed,
some sites also use a 
trick at a higher layer. Namely, they exploit that web
accelerators usually 
follow links indiscriminantly, even ones that are not
visible or clickable (a 
transparent 1-pixel PNG or a CSS-disabled link, for
instance). If you add 
such a link to your webpage it is safe to assume that only
robots "click" it; 
and once the linked URL has been requested you can do
further processing 
(such as displaying a notice to the user on the next dynamic
page load of the 
main page, or adding the user to a temporary blocklist; how
that is 
implemented is left up to you -- you could check cookies,
redirect with 
additional GET-parameters set, or have more intelligent
handling inside your 
dynamic pages, for example).
If you also make sure that the robots.txt excludes at least
that one file, 
well-behaving bots will never trigger the script behavior.
Combined with 
User-Agent checking, this will catch most of the cases.

--Eike