Unified threat management (UTM) spawned a new era of IT security. The promise of these integrated security appliances proved to be an exceptional and efficient way of securing commercial networks. Businesses today face an inflection point, with changing market trends and new technologies that demand more of today's UTM. Hence the need is for eXtensible threat management (XTM) solutions, the next generation of UTM appliances. This paper provides an overview of these issues and the WatchGuard® perspective on "extensibility" and XTM