“AT&T on Thursday said that unknown attackers were responsible for intermittent disruptions that affected Internet services for its business customers on Wednesday.
The telecommunications giant would not discuss the locations or the number of customers affected. In a statement, an AT&T spokesperson told SecurityWeek that a DDoS attack targeted the company’s DNS infrastructure in two locations, and that engineers and SOC (Security Operations Center) staff worked to mitigate the situation.”
Source: DDoS Attack Caused AT&T DNS Outage on Wednesday | SecurityWeek.Com