The current trend in the internet working being so rapid, with the automation and increase in speed and sophistication of attack tools, each year doubling of newly discovered vulnerabilities and administrators finding it difficult to keep up to date with patches, increasing permeability of firewalls with firewall friendly protocols that are designed to bypass firewall configurations, increasing threat from infrastructure attacks like Distributed Denial of Service, Worms or attack on Domain Name Server cache and so on, finding generic solutions too is becoming infeasible. The speed with which...