Security is definitely a challenge and an important aspect not to be sidestepped. If a container gets compromised, then bringing down the container host is not a difficult task. Thus, ensuring security for containers and then hosts is indispensable for the flourishing of the containerization concept, especially when the centralization and federation of IT systems are on the climb. In this chapter, we specifically focused on the sickening and devastating security issues on Docker containers and explained the ways and means of having foolproof security solutions for containers that host dynamic, enterprise-class, and mission-critical applications. In the days to unfurl, there will be fresh security approaches and solutions in order to guarantee impenetrable and unbreakable security for Docker containers and hosts, as the security of containers and their contents is of the utmost importance for service providers as well as consumers.