DDoS attacks have been a serious problem for more than a decade now and security staffs have a good handle on how they re executed and how to handle them. One of the more recent tactics adopted by attackers is the use of open DNS resolvers to amplify their attacks. This technique, while not novel, is beginning to cause serious problems for the organizations that come under these attacks. Researchers associated with Host Exploit, a volunteer organization that tracks malicious activity among hosting providers, said in a new report that attackers have been making good use of the numerous poorly.
Source: https://threatpost.com/attackers-turn-open-dns-resolvers-amplify-ddos-attacks-102412/77148/