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HomeBackend DevelopmentPHP TutorialPHP实现检测客户端是否使用代理服务器及其匿名级别_php技巧

要判断客户端是否使用代理服务器,可以从客户端所发送的环境变量信息来判断。

具体来说,就是看HTTP_VIA字段,如果这个字段设置了,说明客户端使用了代理服务器。

匿名级别可以参考下表来判断。

给出一个应用例子,可以挂上代理试试效果: http://ip.mixsec.org/

一、没有使用代理服务器的情况:

     REMOTE_ADDR = 您的 IP
     HTTP_VIA = 没数值或不显示
     HTTP_X_FORWARDED_FOR = 没数值或不显示

二、使用透明代理服务器的情况:Transparent Proxies

    REMOTE_ADDR = 代理服务器 IP
    HTTP_VIA = 代理服务器 IP (补充:这个字段由代理服务器填充,有时会填充网关信息等)
    HTTP_X_FORWARDED_FOR = 您的真实 IP
    这类代理服务器还是将您的信息转发给您的访问对象,无法达到隐藏真实身份的目的。

三、使用普通匿名代理服务器的情况:Anonymous Proxies

    REMOTE_ADDR = 代理服务器 IP
    HTTP_VIA = 代理服务器 IP (补充:这个字段由代理服务器填充,有时会填充网关信息等)
    HTTP_X_FORWARDED_FOR = 代理服务器 IP
    隐藏了您的真实IP,但是向访问对象透露了您是使用代理服务器访问他们的。

四、使用欺骗性代理服务器的情况:Distorting Proxies

    REMOTE_ADDR = 代理服务器 IP
    HTTP_VIA = 代理服务器 IP  (补充:这个字段由代理服务器填充,有时会填充网关信息等)
    HTTP_X_FORWARDED_FOR = 随机的 IP
    告诉了访问对象您使用了代理服务器,但编造了一个虚假的随机IP代替您的真实IP欺骗它。

五、使用高匿名代理服务器的情况:High Anonymity Proxies

   REMOTE_ADDR = 代理服务器 IP
   HTTP_VIA = 没数值或不显示
   HTTP_X_FORWARDED_FOR = 没数值或不显示
   完全用代理服务器的信息替代了您的所有信息,就象您就是完全使用那台代理服务器直接访问对象。

除此之外,可以通过proxy judges总 结其他一些可供参考的判定信息,一遍于在实践中加以利用。

最后写一个php例子,仅供大家参考:

复制代码 代码如下:

if(!empty($_SERVER['HTTP_VIA']))    //使用了代理
{
    if(!isset($_SERVER['HTTP_X_FORWARDED_FOR']))
    {
        //Anonymous Proxies    普通匿名代理服务器
        //代理IP地址为 $_SERVER['REMOTE_ADDR']
   }
   else
   {
        //Transparent Proxies 透明代理服务器
        //代理IP地址为 $_SERVER['REMOTE_ADDR']
        //真实ip地址为 $_SERVER['HTTP_X_FORWARDED_FOR']
   }
}
else    //没有代理或者是高匿名代理
{
    //真实ip地址为 $_SERVER['REMOTE_ADDR']
}
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