Bypass filternet (Node.js version!) [PHP version: https://gist.github.com/alibo/22ed0cf12d8398703335]

filternet_bypass_bug.js

/**
  * There is a bug in filternet (filtering system of Iran).
  * 	if you wait 3 seconds or more 
  * 	before sending http request headers, you can bypass 
  *	filternet! Also you should use LF 
  * 	instead of CRLF (like netcat).
  * 
  *
  * How to run:
  * $ node filternet_bypass_bug.js <domain-address> <http-host-value> <wait-time> <path>
  *
  * - <domain-address> : connecting via tcp
  * - <http-host-value> : [optional] [default: <domain-address>] value of header `Host`
  * - <wait-time> : [optional] [default: 2] waiting time before requesting
  * - <path> : [optional] [default: '/'] GET <path> HTTP/1.1
  */
var net = require('net');
 
var client = new net.Socket();

var domain = process.argv[2];
var host = process.argv[3]? process.argv[3]: domain;
var waitTime = process.argv[4]? process.argv[4]: 3;
var path = process.argv[5]? process.argv[5]: '/';

client.connect(80, domain, function() {
	console.log('Connected to ' + domain);
	
	setTimeout(function(){
		console.log('Requesting GET ' + path + ' HTTP/1.1');
		console.log('Host: ' + host);
		console.log('===================');
		client.write('GET ' + path + ' HTTP/1.1\n');
		client.write('Host: ' + host + '\n\n');
	}, waitTime * 1000);
});
 
client.on('data', function(data) {
	console.log("Response: ");
	console.log('===================');
	console.log(data.toString());
	client.destroy(); // kill client after server's response
});
 
client.on('close', function() {
	console.log('Connection closed');
});