GCIH: GIAC Certified Incident HandlerDemo

Adam is a Security Administrator for Umbrella Inc. He has been tasked with securing access to the company network from every possible entry point. He segmented the network into several subnets and deployed firewalls throughout the network. He configured very strict rules on every firewall, blocking all inbound and outbound traffic except the ports that are required. Port 80 must remain open because the company hosts a website that must be reachable from the Internet. Adam remains concerned about programs such as Hping2 that can enter a network through covert channels.

Which of the following is the most effective method to protect the company network from an attacker using Hping2 to scan its internal network?