Complete security does not exist, cloud or no-cloud. However, there are specific cloud computing security-related and service-related considerations that must be addressed. An interesting question in cloud environments is the necessity of a network perimeter. Whereas servers and virtual machines can be secured tightly with a traditional perimeter, cloud VPNs may need a perimeter firewall in addition to the device and server firewalls which can be provided by the operating system and additional security software. Additionally, a network perimeter in the form of a UTM firewall may be particularly useful for enterprises which have a variety of networked devices that need to be protected. For other environments though, managing the devices, end-user access and central administrative control are critical to ensuring cloud VPN security.
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