Key_Master - 4:09 pm on Mar 19, 2012 (gmt 0)
Open port 80 doesn't equal proxy. Most proxy configurations don't even allow inbound connections on port 80. Try to connect to proxy
18.104.22.168 on port 80. You can't, even though it's notorious for being used by spammers.
On the other hand, I would be blocked by this PHP code because my home security system and satellite box is connected to the net on port 80. I'm not using a proxy and any message to that effect would come across to me as amateurish. Forget about captcha or other authentication hassles- that's almost worse than the proxy message. At that point, I've already lost trust in your site. I'll spend my time and money elsewhere.