1. A system for real-time activity monitoring and responsive actions, comprising: a host having an application; a client in communication link with and interacting with the application; and a monitor having traffic, rules and actions engines, the traffic engine for substantially real-time sniffing and parsing of all communications between the client and the host, the rules engine for a substantially real-time rule-based evaluation of parsed communications, and the actions engine for a substantially real-time performance of an action responsive to a communication which is deemed by the rule-based evaluation to meet a rule applied by the rules engine, wherein the monitor is transparent to both the client and the application running on the host.