Web Hosting Talk : Web Hosting Main Forums : Programming Discussion : detecting proxy hits

[Jim999]

hi all

I'm building a traffic trading script and I want to be able to detect proxy hits.

googling for info on how to do this I found:
http://www.stayinvisible.com/index.p...ymity_of_proxy

so I wrote a script looking for those headers the proxy sends (giving up on the elite proxies):

PHP Code:


if(
    ($_SERVER["HTTP_X_FORWARDED_FOR"] != "" && $_SERVER["HTTP_X_FORWARDED_FOR"] != "unknown") ||
    ($_SERVER["HTTP_X_FORWARDED"] != "" && $_SERVER["HTTP_X_FORWARDED"] != "unknown") ||
    ($_SERVER["HTTP_VIA"] != "" && $_SERVER["HTTP_VIA"] != "unknown") ||
    ($_SERVER["HTTP_CLIENT_IP"] != "" && $_SERVER["HTTP_CLIENT_IP"] != "unknown")
    )
{ $proxy=true; } 


hope I didn't miss or mixed up anything in the above code.

the problem is, i've heard a lot of AOL users use proxy, so do earthlink and more...and I don't want to ignore those hits, How do I detect them?

[folsom]

Just check for via. That is the only header that a lot of proxy servers send. There will be a lot of proxy servers that send nothing other than client headers and there will be others that even strip some of those.

[Jim999]

i did'nt explain myself clearly

I would like to detect an anonymous proxy hit in order block them.

BUT I don't have a problem with transparent proxies and i don't want to do anything once I detect a transparent proxy hit.

what i'm looking for is a way to distinguish a trasparent proxy hit from an anonymous proxy hit

[m-b]

> I would like to detect an anonymous proxy hit in order block them.

They wouldn't be "anonymous", if they'd send any HTTP-Headers that would identify them ...
Their hits should look like those of hosts that are directly connected to the internet.

But there my be some traps:
* a page view may create hits from multiple ips (scrambling network), e.g. like proxys from aol
* You could explore those networks through own scripts, and block end-points
* reverse names of end-points may match regular expressions


Michael