sometimes when I am using a proxy to access some sites, I get an error message saying I cannot access the site. I dont know how they do it but they have a way of detecting that you are using a proxy and blocking you. I would like to do the same thing. I want to block proxies. in addition, I want to block any ip address listed on sites like stopforumspam and spamhaus. Also, I want to block certain countries, like India, Pakistan, Philippines, pretty much if they are not in US or Canada, I dont want them on my site. how can I do these?