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Application Firewall Design

Web Application Firewall, 7layer Firewall

Mr. Neo Chen (陈景峯), netkiller, BG7NYT


中国广东省深圳市龙华新区民治街道溪山美地
518131
+86 13113668890


版权声明

转载请与作者联系,转载时请务必标明文章原始出处和作者信息及本声明。

文档出处:
http://netkiller.github.io
http://netkiller.sourceforge.net

微信扫描二维码进入 Netkiller 微信订阅号

QQ群:128659835 请注明“读者”

$Id: appfirewall.xml 494 2012-11-21 10:25:26Z netkiller

摘要

提供web url的保护, 实现访问控制


目录

1. 功能说明

  1. 计数器

  2. 策略

  3. 访问控制

  4. 用户认证

1.1. 访问控制列表 ACL

  1. 黑名单

  2. 白名单

1.2. 用户认证

  1. AAA

  2. LDAP

  3. MySQL

1.3. 元素

  1. IP地址,端口号

  2. URL(GET)

  3. POST

  4. Cookie

  5. HTTP Header

  6. 协议(HTTP,JASON,AJAX,SOAP,XML-RPM...)

2. 使用方法

2.1. 嵌入使用

作为SDK/API的方式使用

2.2. URL代理

http://app.mydomain.com/firewall/login

login: http://login.mydomain.com/

根据login关键字,将url跳转到指定的保护URL上面

2.3. 代理方式

3. URL代理实现方式

http://app.mydomain.com/firewall/login

		
login: http://login.mydomain.com/
		
		

		

4. example

		
<?php
/*
* =====================================
* Website: http://netkiller.github.com
* Author: neo <netkiller@msn.com>
* Email: netkiller@msn.com
* =====================================
*/
class ApplicationFirewall{

	protected $status;
	protected $policy;
	protected $chain;
	protected $rule;
	protected $match;
	private $debug;
	//$get,$post,$cookie,$server;

	public function __construct() {
		$this->name 	= "ApplicationFirewall";
	}

	public function __destruct() {
		//print "Destroying " . $this->name . "\n";
	}

	public function enable(){
		$this->status = true;
	}
	public function disable(){
		$this->status = false;
	}

	public function get(){
		if($this->status){
			$this->chain 	= $_GET;
			return($this);
		}else{
			return($this->status);
		}
	}

	public function post(){
		if($this->status){
			$this->chain 	= $_GET;
			return($this);
		}else{
			return($this->status);
		}
		$this->chain 	= $_POST;
	}

	public function cookie() {
		if($this->status){
			$this->chain = $_COOKIE;
			return($this);
		}else{
			return($this->status);
		}

	}

	public function server(){
		if($this->status){
			$this->chain = $_SERVER;
			return($this);
		}else{
			return($this->status);
		}
	}

	public function match($key, $value){
		if($this->debug) print_r($this->chain);
		$this->match = false;
		if(!array_key_exists($this->chain, $key)){
			if($this->chain[$key] == $value){
				$this->match = true;
			}
		}
		return($this);
	}
	public function policy($p){
		$this->policy = $p;
	}
	public function counter($tm, $cnt){
		return($this);
	}
	public function allow($fun = null){
		if($this->status && $this->match){
			if($fun){
				$fun();
			}
		}
		$this->destroy();
		return($this->status);
	}
	public function deny($fun = null){
		if($this->status && $this->match){
			if($fun){
				$fun();
			}
		}
		$this->destroy();
		return($this->status);
	}
	public function debug($tmp){
		$this->debug = $tmp;
	}
	public function ip($ipaddr){
		return $this->server()->match('REMOTE_ADDR', $ipaddr);
	}
	public function destroy(){
		$this->chain = array();
		$this->match = false;
	}
};

#include_once('applicationfirewall.php')
$fw = new ApplicationFirewall();

$fw->debug(true);
$fw->debug(false);
$fw->enable();
//$fw->disable();
function test(){
	echo 'OK';
};
function allow(){
	echo 'allow';
};
function deny(){
	echo 'deny';
};
//$fw->policy('blacklist');

$fw->ip('192.168.3.17')->allow('allow');
$fw->ip('192.168.3.17')->deny('deny');

$fw->counter('1m',5)->match('id','1000')->deny('test');

/*
$fw->ip('172.16.0.0/24')->allow();
$fw->ip('172.16.0.0','255.255.255.0')->allow();

$fw->header(array('User-Agent' => 'MSIE5'))->deny()
*/
$fw->get()->match('id','1000')->deny('test');
$fw->get()->match('name','chen')->allow('test');
//$fw->get()->match(array('id' => '1000'))->deny();
/*
$fw->post()->data(array('action'=>'/login.php'))->allow()
$fw->cookie()->data(array('userid'=>'test'))->deny()
*/
$fw->server()->match('HTTP_REFERER', 'http://www.mydomain.com/index.html')->allow('test');
$fw->server()->match('REQUEST_METHOD', 'GET')->deny('test');

$fw->disable();
//$fw->destroy();
		
		
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