How to block visitor if hostname contain a custom word

hello guys,

i'm trying to create a simple script that block an user if the hostname contain an custom word

for example if the user hostname contain "proxy" or "vpn"
then the script should block that user and print white page or 404


any help ?

 

You can use the HTTP_HOST server variables against the words using stripos method.

 

If i'm not totally off this should give you the functionality that you want.

<?php

if (substr_count($_SERVER["REMOTE_HOST"], "vpn") > 0) {
    die("Access denied, do not use a proxy!");
}

?>

PHP:

Live example: http://test.helgesverre.com/proxytest.php

Note: Your web server must be configured to create this variable.
For example in Apache you'll need HostnameLookups On inside httpd.conf for it to exist.

 

thank you, how i can block multi words ?

vpn, proxy, word3 ?

 

<?php
$blocked_words = array(
     "vpn",
     "proxy",
     "word3"
);


foreach($blocked_words as $word) {
    if (substr_count($_SERVER["REMOTE_HOST"], $word) > 0) {
        die("Access denied, do not use a proxy!");
    }  
}

?>

PHP:

There you go

 

thank you

 

You're welcome.

 

And, if you're smart, you'll change all those double quotes to single quotes, as they're not being parsed - with double quotes, PHP looks for variables inside the quotes, while it doesn't do that with single quotes. Not that important in this case, but a thing to remember when the amount of code-lines goes up into thousands, and you're looking for ways to improve speed.

 

Ahh, yes!
Although in this case it doesn't matter that much.

 

there are much smarter ways to block proxies,
maxmind DB geolite free, with cool accuracy,
does return "Anonymous Proxy" for proxy users,
instead of country, so this shall be much better