Non-web protocol support refers to the ability to protect non-web protocols (e.g., proprietary gaming protocols) even if the organization does not possess a Class C network.
An organization that has a Class C network can divert traffic to the provider using BGP. Otherwise, in most cases, it is not possible because many vendors allow only an L7 web-based proxy. An L4 proxy is not supported. This leaves proprietary protocols unsupported and at great risk.