DDoS-for-hire services are upping the potency of distributed denial-of-service attacks with a new technique. The technique abuses a widely used Internet protocol that drastically increases the amount of junk traffic directed at targeted servers. The biggest D/TLS-based attacks Netscout has observed delivered about 45 Gbps of traffic. The company has identified almost 4,300 publicly reachable D/LTS servers that are susceptible to the abuse. The attacks can be challenging to mitigate because the size of the payload is too big to fit in a single UDP packet.