Internet Protocol Security (IPSec) is a secure network protocol suite which is primarily used to establish Virtual Private Network (VPN) connections across unsecure networks. IPSec utilizes the Internet Key Exchange (IKE) protocol to ensure secure connections and will authenticate and encrypt packets of data sent over an Internet Protocol (IP) network. Denial-of-Service (DoS) flooding DDoS attacks against IPSec were common a few years ago, however, since the adoption of IKEv2, these types of volumetric DDoS attacks have been rendered largely ineffective.