DNS BASED ENFORCEMENT FOR CONFINEMENT AND DETECTION OF NETWORK MALICIOUS ACTIVITIES

Malicious network activities do not make use of the Domain Name System (DNS) protocol to reach remote targets outside a local network. This DNS-based enforcement system for confinement and detection of network malicious activities requires that every connection toward a resource located outside the local network is blocked by default by the local enforcement box, e.g. a firewall or a proxy. Outbound connections are allowed to leave the local network only when authorized directly by an entity called the DNS Gatekeeper.