什么是CC攻击？

CC攻击：DDOS(分布式拒绝服务攻击)的一种。黑客利用代理服务器或者控制的肉鸡，向目标web网页发送大量的请求，致使CPU处理不过来这么多的请求，长期处于100%的状态。造成通过该页面访问的端口堵塞，正常请求进不来。

怎么判断自己是在被CC攻击

CC攻击主要工作原理是耗资源，这就需要看是哪种攻击方式，看抓包分析是否是通过多IP，刷新页面，如果是这是最典型的Cc攻击。如果cc攻击你网站打不开，指定会有一种资源耗尽，才会引发网站打不开，打开卡。

1.访问那些需要大量数据操作，如搜索页面，就是需要大量CPU时间的页面

2.访问有大量图片或音视频内容的页面。

第一种的CC攻击就是占用完你的cpu，让合法的请求埋没大大量的攻击请求中。这是以前的高水平的黑客喜欢使用的方法。因为只需要很少的带宽（小于1M)就可以让你的100M 甚至1G的带宽的网站立即挂掉。

第二种CC攻击是目前使用最普遍也是最简单的攻击方式。不需要去分析被攻击网站的实际内容，直接对某个页面发起攻击就能起作用。如果你的网页其中一面有256Kbyte (包括所要打开的图片等内容），那么就需要1Mbit/s的带宽2秒时间来打开。而客户发送给服务器的请求包长最多就 1Kbyte.所以攻击比例是256倍。

同时有100个客户来点开这个页面的话，就需要有100Mbit/s 的带宽来支持。客户都能在2秒种内打开这个网站。这100个客户发起访问所需的带宽才100Kbyte X 8=0.8Mbit/s 。这样看来1M不到的带宽来攻击网站，网站得准备有100M的带宽来应付。

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