Akamai: 4th-largest DDoS attack the company has ever encountered leveraged WS-Discovery, which is found everywhere WSD is a highly exploitable UDP amplification technique. WSD allows for high-volume attacks, with amplification rates of up to 15,300 percent of the original byte size. The attack was seen targeting a customer in the gaming industry, according to a blog post attributed to a security engineer from Akamasi. The technology is found in everything from HP printers since 2008 to Microsoft Windows OSes since Vista.
Source: https://threatpost.com/massive-gaming-ddos-attack-widespread-technology/148443/