Cloudflare 阻止了一次將近 2 Tbps 的多項量 DDoS 攻擊
2021-11-13
本週稍早,Cloudflare 自動偵測到並緩解了一次高峰接近 2 Tbps 的 DDoS 攻擊...
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DDoS 攻擊高峰幾近於 2 Tbps
\n上一季,我們觀察到多次 TB 強度的 DDoS 攻擊,此次攻擊延續了這種攻擊強度日益增加的趨勢。我們第三季 DDoS 趨勢報告中另一個重要的發現是,網路層 DDoS 攻擊實際上的環比增長率為 44%。雖然第四季尚未結束,我們已再次觀察到多次以 Cloudflare 客戶為目標的 TB 強度攻擊。
DDoS 攻擊高峰為 1-1.4 Tbps
\n一開始,我們的系統會持續分析「路徑外」的流量樣本,以便我們能夠以非同步方式偵測 DDoS 攻擊,而不會造成延遲或影響效能。偵測到攻擊流量後(在幾次秒內),我們的系統就產生一個即時的簽章,精確地與攻擊模式進行比對以緩解攻擊,而不會影響合法的流量。
產生之後,就會將該特征作為短暫的緩解規則傳播到 Cloudflare 邊緣最佳的位置,以進行最符合成本效益的緩解。在這個特定的案例中,如同多數的 L3/4 DDoS 攻擊,該規則是以內嵌方式推播至 Linux 核心 eXpress 資料路徑 (XDP),以迅速捨棄攻擊封包。
Cloudflare 的 DDoS 防護系統概念圖
\n閱讀更多有關 Cloudflare DDoS 防護系統的資訊。
\nCloudflare 的使命是協助為所有人打造更美好的網際網路──安全、更快速且更可靠的網際網路。DDoS 防護團隊的願景源自這一使命:我們的目標是讓 DDoS 攻擊的影響成為歷史。無論是 Meris 殭屍網路(曾發動部分有史以來最大規模的 HTTP DDoS 攻擊)、最近對 VoIP 提供者的攻擊,還是這種對網際網路設備進行 DDoS 攻擊的 Mirai 變體,Cloudflare 的網路都會自動偵測並緩解 DDoS 攻擊。Cloudflare 能夠為所有類型的網際網路設備提供安全、可靠、效能佳且可自訂的平台。若要進一步瞭解 Cloudflare 的 DDoS 防護解決方案,請與我們聯絡。如需親身評估 Cloudflare 的免費方案,請在此註冊。
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本週稍早,Cloudflare 自動偵測到並緩解了一次高峰接近 2 Tbps 的 DDoS 攻擊...
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