5 minutes to understand — DNS cache poisoning

The DNS (Domain Name Sys­tem) is a key ser­vice of the Inter­net. It is a giant, hier­ar­chi­cal and dis­trib­uted direc­to­ry that asso­ciates IP address­es with domain names that are eas­i­er to iden­ti­fy, remem­ber and trans­mit. It is the cor­ner­stone of the Inter­net, whose infra­struc­ture has flaws by its very con­cep­tion, mak­ing it an ide­al tar­get for attacks. On one hand, the DNS ser­vice is based on the author­i­ta­tive DNS, which holds the infor­ma­tion, and on the oth­er hand, the resolver DNS, which car­ries out the res­o­lu­tion for the web users.
The DNS cache poi­son­ing attack tar­gets resolver DNS.

Find in this “5 min­utes to under­stand” doc­u­ment, what is this DNS cache poi­son­ing attack and how to pro­tect against it.

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