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幫助中心 > 行業(yè)資訊 > 其他 > DDOS攻擊的危害及防御方法有哪些？

DDOS攻擊的危害及防御方法有哪些？

2021-06-18 19:10:57 159

有權威數據統計顯示，2020年的DDOS攻擊數在經(jīng)歷了2018年底司法機關(guān)的重拳打擊后迎來(lái)強勢反彈，攻擊次數創(chuàng )下歷史新高，同比增幅高達135%。接下來(lái)，我們就一起來(lái)了解一下對網(wǎng)絡(luò )安全有極大威脅的DDOS攻擊。

DDOS攻擊是指被攻擊者受到來(lái)自不同地方的攻擊。一種是流量攻擊，占用帶寬；另外一種是資源耗盡攻擊，占用服務(wù)器的CPU和內存等處理能力；讓用戶(hù)無(wú)法正常訪(fǎng)問(wèn)。DDoS攻擊破環(huán)力強大，是目前最常見(jiàn)的網(wǎng)絡(luò )攻擊方式之一，其見(jiàn)效快，成本低的特點(diǎn)，讓DDOS這種攻擊方式深受不法分子的喜愛(ài)。那么，DDOS攻擊到底有那些危害呢？

DDOS攻擊目的是阻止用戶(hù)訪(fǎng)問(wèn)，而對于政企客戶(hù)來(lái)說(shuō)，可能會(huì )造成如下幾種危害。

業(yè)務(wù)受損：

如游戲行業(yè)、在線(xiàn)教育、電商平臺，金融行業(yè)，直播平臺等需要業(yè)務(wù)驅動(dòng)的網(wǎng)站，一旦受到攻擊，訪(fǎng)問(wèn)量減少或者沒(méi)有了訪(fǎng)問(wèn)量，業(yè)務(wù)就會(huì )受損，導致收入嚴重減少，影響行業(yè)正常發(fā)展。

信譽(yù)受損:

業(yè)務(wù)網(wǎng)站、服務(wù)器無(wú)法訪(fǎng)問(wèn)會(huì )造成用戶(hù)體驗感差，用戶(hù)投訴等問(wèn)題不斷出現，從而導致潛在客戶(hù)流失及現有客戶(hù)對平臺的安全性與穩定性產(chǎn)生懷疑，造成客戶(hù)信任危機出現，對企業(yè)來(lái)說(shuō)還會(huì )影響信用評級。

資料外泄：

受到DDOS攻擊時(shí)，容易受到網(wǎng)絡(luò )入侵或者攻擊者利用上傳惡意軟件來(lái)轉移被攻擊者的注意力導致數據被盜，信息丟失等問(wèn)題特別如機密文件和公司內部信息泄露讓被攻擊者遭受巨大損失。

既然DDOS攻擊有如此嚴重的危害，那就必須采取防御方法來(lái)止損。DDOS防御的方法有如下幾種：

盡量避免NAT的使用:

無(wú)論是路由器還是硬件防護墻設備要盡量避免采用網(wǎng)絡(luò )地址轉換NAT的使用，因為采用此技術(shù)會(huì )較大降低網(wǎng)絡(luò )通信能力。因為NAT需要對地址來(lái)回轉換，轉換過(guò)程中需要對網(wǎng)絡(luò )包的校驗和進(jìn)行計算，因此浪費了很多CPU的時(shí)間。當然有時(shí)候必須使用那就沒(méi)有辦法了。

安裝Web應用防火墻:

WAF部署在web應用程序前面，在用戶(hù)請求到達web服務(wù)器前對用戶(hù)請求進(jìn)行掃描和過(guò)濾，分析并校驗每個(gè)用戶(hù)請求的網(wǎng)絡(luò )包，確保每個(gè)用戶(hù)請求有效且安全，對無(wú)效或有攻擊行為的請求進(jìn)行阻斷或隔離。通過(guò)檢查HTTP流量，可以防止源自web應用程序的安全漏洞（如SQL注入，跨站腳本攻擊，文件包含和安全配置錯誤）的攻擊。而藍隊云具有十年以上安全攻防經(jīng)驗，團隊不斷提煉并優(yōu)化防護規則，讓W(xué)AF的安全性和可用性有了保障。

部署高防CDN：

將網(wǎng)站內容分發(fā)到不同地區的節點(diǎn)上，通過(guò)此方式來(lái)縮短訪(fǎng)問(wèn)者主機與儲存網(wǎng)站內容的主機之間的距離，也包括解決不同運營(yíng)商線(xiàn)路所導致的訪(fǎng)問(wèn)速度降低的問(wèn)題。同時(shí)也解決了網(wǎng)絡(luò )擁擠的狀況以及被DDOS攻擊的困擾，提高用戶(hù)訪(fǎng)問(wèn)網(wǎng)站的響應速度。從技術(shù)上解決由于網(wǎng)絡(luò )帶寬不足、用戶(hù)訪(fǎng)問(wèn)量大、節點(diǎn)分流不均等原因所造成的用戶(hù)訪(fǎng)問(wèn)網(wǎng)站響應速度慢的問(wèn)題。受到DDOS攻擊時(shí)可以用高防CDN分攤（抵擋）DDOS攻擊量，以確保網(wǎng)站能正常運行。藍隊云為客戶(hù)提供中立、安全、可靠的高防CDN服務(wù)，聚合多平臺優(yōu)質(zhì)CDN節點(diǎn)，遇故障自動(dòng)為用戶(hù)切換資源，做到安全無(wú)感知。

購買(mǎi)高防IP:

用戶(hù)購買(mǎi)高防IP，把域名解析到高防IP上同時(shí)在高防IP上設置轉發(fā)規則;所有公網(wǎng)流量都會(huì )走高防IP，通過(guò)端口協(xié)議轉發(fā)的方式將用戶(hù)的訪(fǎng)問(wèn)通過(guò)高防IP轉發(fā)到源站IP，同時(shí)將惡意攻擊流量在高防IP上進(jìn)行清洗過(guò)濾后將正常流量返回給源站IP，從而確保源站IP穩定訪(fǎng)問(wèn)的防護服務(wù)。用戶(hù)可以通過(guò)配置藍隊云高防IP，將攻擊流量引流到高防IP，確保源站的穩定可靠。藍隊云高防IP具有海量防護資源，可以有效抵御各類(lèi)基于網(wǎng)絡(luò )層、傳輸層及應用層的DDOS攻擊，可以帶給用戶(hù)極速訪(fǎng)問(wèn)的體驗，并且支持彈性防護，用戶(hù)可按需購買(mǎi)。

網(wǎng)絡(luò )安全一直都很重要，為了減小被攻擊的風(fēng)險，有必要做好抗DDOS攻擊的防護。并且DDOS攻擊是無(wú)法避免的，所以防攻將是一份長(cháng)期的工作，有防護經(jīng)驗的朋友們歡迎和我們交流。

提交成功！非常感謝您的反饋，我們會(huì )繼續努力做到更好！

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