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AWS said it mitigated a 2.3 Tbps DDoS attack, the largest ever

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Amazon said its AWS Shield service mitigated the largest DDoS attack ever recorded, stopping a 2.3 Tbps attack in mid-February this year.


The incident was disclosed in the company's AWS Shield Threat Landscape [PDF], a report detailing web attacks mitigated by Amazon's AWS Shield protection service.


The report didn't identify the targeted AWS customer but said the attack was carried out using hijacked CLDAP web servers and caused three days of "elevated threat" for its AWS Shield staff.


CLDAP (Connection-less Lightweight Directory Access Protocol) is an alternative to the older LDAP protocol and is used to connect, search, and modify Internet-shared directories.


The protocol has been abused for DDoS attacks since late 2016, and CLDAP servers are known to amplify DDoS traffic by 56 to 70 times its initial size, making it a highly sought-after protocol and a common option provided by DDoS-for-hire services.........




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