4.1 million Internet-connected Universal Plug and Play (UPnP) devices are potentially vulnerable to being used in reflection and amplification DDoS attacks. South Korea owns the largest number of vulnerable UnPn devices, followed by the US, Canada, China, Argentina and Japan. The company recommends that vendors and ISPs take better patch and management actions to make sure misconfigured devices don`t end up in users’ homes. They also advise blocking source port 1900 to prevent unnecessary bandwidth loads as a preventative measure.”]