PHP to detect users accessing site via proxy server

I am after php code which detects if a user is accessing your site via a proxy server

this is the sort of code I have got.. is there a better way ?

<?php
// start code

// if getenv results in something, proxy detected

if (getenv('HTTP_X_FORWARDED_FOR')) {
$ip=getenv('HTTP_X_FORWARDED_FOR');
}

// otherwise no proxy detected

else {
$ip=getenv('REMOTE_ADDR');
}

// print the IP address on screen
echo $ip;
?>

 

As far as I know, this is the code yes.

 

It wont work if, the user is browsing through anonymous proxy (which dont send X-FORWARDED-FOR header) including web based proxies.

 

Will this show the user error message or something ?

will it block him from proceeding to view the site ?

 

If you wanna to see really detecting script in action that detect 95% of all proxies then visit my site and take a look by 2 script - basic and advanced.
Same script has been integrated into contact form to stop spamming.
Unfortunatelly the script is not for sale and not for sharing.
Proxy Detector

 

i have tried this code it did not work

the tool of deny is great but i think he is not selling it

 

Haven't used this myself so not sure about its effectiveness.

if (
      $_SERVER['HTTP_X_FORWARDED_FOR']
   || $_SERVER['HTTP_X_FORWARDED']
   || $_SERVER['HTTP_FORWARDED_FOR']
   || $_SERVER['HTTP_VIA']
   || in_array($_SERVER['REMOTE_PORT'], array(8080,80,6588,8000,3128,553,554))
   || @fsockopen($_SERVER['REMOTE_ADDR'], 80, $errno, $errstr, 30))
{
    exit('Proxy detected');
}

PHP:

 

Read this post:
http://forums.digitalpoint.com/showthread.php?p=4549188#post4549188

 

i added this to my pages and it works

 

Thumbs up on HTTP_CLIENT_IP, I have added it to the list:

if (
      $_SERVER['HTTP_X_FORWARDED_FOR']
   || $_SERVER['HTTP_X_FORWARDED']
   || $_SERVER['HTTP_FORWARDED_FOR']
   || $_SERVER['HTTP_CLIENT_IP']
   || $_SERVER['HTTP_VIA']
   || in_array($_SERVER['REMOTE_PORT'], array(8080,80,6588,8000,3128,553,554))
   || @fsockopen($_SERVER['REMOTE_ADDR'], 80, $errno, $errstr, 30))
{
    exit('Proxy detected');
}

PHP:

 

You can consider the new method in detecting the anonymous proxy server.

http://www.ip2proxy.com

 

It is limited service and not very accurate.
For example i tried via web proxy server 2getonline.info to test both service.


http://www.proxyserverprivacy.com show me this:
----------------------------------------------------
ProxyServerPrivacy detection
Your Ip Address: 66.197.167.120
Host: kraton.revti.net
Your Country:
City: Reno, NV
Proxy HTTP_X_FORWARDED Variable: (none)
Proxy HTTP_VIA Variable: (none)
Proxy HTTP_PROXY_CONNECTION: (none)
Cache Pragma: (none)
Your Browser: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.0.3) Gecko/2008092417 Firefox/3.0.3 (.NET CLR 3.5.30729)
Type of Your connection: (none)
Server Protocol: HTTP/1.1
Your language: (none)
Accept: */*
Accept-Encoding: deflate, gzip
Referer - HTTP Request come from:
Your Port: 52715

Conclusion after analyzing ip address:
It seems that you are behind Proxy 66.197.167.120 (kraton.revti.net).
---------------------------------------------------------------------

I tried with same IP address to test it on second service from http://www.ip2proxy.com/ and what i have received is:

Ip Address: 66.197.167.120
Proxy: No


It is clearly web proxy where commercial service failed and free one not.