The customer, a high-profile Government entity, was targeted by a DDoS attack in the context of a wider campaign against Government sites in this country.
In the days preceding the attack, Anonymous published warnings and threats of attacks through their usual means of communication (Youtube, Twitter, Facebook).
The site was protected by a DefensePro device, just installed and configured few days ago. ERT, which was invoked, logged in on the day of the attack to tune the device which successfully mitigated the attack and the website was available to users.
This document describes different attack vectors and their mitigation and discusses the effectiveness of Geo-Blocking, used by the customer during the attack.