CC攻擊是DDOS的一種，前身名為Fatboy攻擊，也是一種常見的網(wǎng)站攻擊方法。CC攻擊原理就是模擬多個(gè)用戶對(duì)一些資源消耗較大的頁面不斷發(fā)出請(qǐng)求，從而達(dá)到消耗服務(wù)器資源的目的。CC主要是用來攻擊頁面的，當(dāng)一個(gè)網(wǎng)頁訪問的人數(shù)特別多的時(shí)候，每一個(gè)訪問的人服務(wù)器就需要時(shí)間來處理這些信息，這時(shí)候大量的人數(shù)就會(huì)造成打開網(wǎng)頁變慢的情況，像CC就是模擬多個(gè)用戶不停地進(jìn)行訪問那些需要大量數(shù)據(jù)操作的頁面，造成服務(wù)器資源的浪費(fèi)，CPU長時(shí)間處于100%，永遠(yuǎn)都有處理不完的連接直至網(wǎng)絡(luò)擁塞，正常的訪問被中止。

CC攻擊類型有一下幾種： 1、直接攻擊：主要針對(duì)有重要缺陷的Web應(yīng)用程序，這種情況比較少見，一般只有在程序?qū)懗鲥e(cuò)的時(shí)候才會(huì)出現(xiàn)。2、代理攻擊：代理攻擊是黑客借助代理服務(wù)器生成指向受害主機(jī)的合法網(wǎng)頁請(qǐng)求，實(shí)現(xiàn)DOS和偽裝。攻擊者模擬多個(gè)用戶不停地進(jìn)行訪問那些需要大量數(shù)據(jù)操作，需要大量CPU時(shí)間的頁面。3、僵尸網(wǎng)絡(luò)攻擊：攻擊者通過各種途徑傳播僵尸程序，然后當(dāng)用戶感染并激活病毒時(shí)，攻擊者就可以控制電腦，并下發(fā)各種遠(yuǎn)程命令，最后隨著被感染的電腦越來越多，就形成了龐大的僵尸網(wǎng)絡(luò)。

CC攻擊主要是以策略進(jìn)行防御的。通過設(shè)定一些特征分析攻擊的IP（CC攻擊基本上都是同個(gè)方式發(fā)出的比較多，例如同一時(shí)間某些連接模式量比較大，這類可能就是攻擊特征。），進(jìn)行阻斷和屏蔽。所以CC防御最重要的一點(diǎn)就是誤封率。即防火墻是否會(huì)把正常訪問的IP連同攻擊IP一起阻斷屏蔽。這個(gè)也是CC防御好壞的一個(gè)重要判斷因素。

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