#What exactly do you want to attack?  Determining the real source of the IP
#HTTP request?  I don't think this is at all possible, and if you have a
#fair amount of success, it will not be total.  At the very best you will
#be in a cat-and-mouse game of plugging up holes.
#

Yeah, determining the real source IP of an HTTP request is what I need.  We really 
just need to get the IP address since the targetting is done by a simple API that is 
backed by a database maintained by the geotargetting service provider -- they actually 
have a group that verifies IP information with approximated geographical local, and 
provides database update to customers like us.

>From my experience, most geotargetting services can pinpoint an IP at the city level.

#Remember that in squid it is totally optional to insert an
#X-Forwarded-For, and X-Client-IP.  If a client wants to be totally
#anonymous, he can configure his squid/firewall to function as such.
#

That's the initial solution I've thought of.. but as we've found out (which you 
pointed out too), the header fields are not guaranteed which makes the solution a 
half-baked one.

Thanks,

jeff --
-- 
Jeff Gutierrez
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