How to block access from proxy sites?

[donb]

I want to block a country which brings just hackers or thieves to my site and no real sales. I know they will try to use proxies - how can I block them or at least make it as difficult as possible to access my sites?

[Nasty]

you would lose legit traffic as well by blocking proxies, use geoip to block bad countries or a free cloudflare account to block known bad users

[Fetish Gimp]

http://www.wpreads.com/2013/03/block...ess-sites.html

Basically you add this to your .htaccess file

<IfModule mod_rewrite.c>
 RewriteEngine on
 RewriteCond %{HTTP:VIA}                 !^$ [OR]
 RewriteCond %{HTTP:FORWARDED}           !^$ [OR]
 RewriteCond %{HTTP:USERAGENT_VIA}       !^$ [OR]
 RewriteCond %{HTTP:X_FORWARDED_FOR}     !^$ [OR]
 RewriteCond %{HTTP:PROXY_CONNECTION}    !^$ [OR]
 RewriteCond %{HTTP:XPROXY_CONNECTION}   !^$ [OR]
 RewriteCond %{HTTP:HTTP_PC_REMOTE_ADDR} !^$ [OR]
 RewriteCond %{HTTP:HTTP_CLIENT_IP}      !^$
 RewriteRule .* - [F]
</IfModule>

And if you're using Wordpress you add this as the first line in your header file

<?php if(@fsockopen($_SERVER['REMOTE_ADDR'], 80, $errstr, $errno, 1)) die("Proxy access not allowed"); ?>

Haven't tested it myself but you might want to give that a shot

[BNMedia]

I use geoip and strongbox to block countries where a high level of fraud and file sharing originated.
Losing a handful of possible legit sales is worth it for less headache!