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DHCP Aided Hacker Prevention Disclosure Number: IPCOM000020079D
Original Publication Date: 2003-Oct-23
Included in the Prior Art Database: 2003-Oct-23
Document File: 2 page(s) / 37K

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DHCP Aided Hacker Prevention

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DHCP Aided Hacker Prevention

This invention, DHCP Aided Hacker Prevention (DAHP), solves two problems commonly associated with laptop computers brought from home and plugged into the workplace network: 1) the laptop contains a virus or worm or, 2) the laptop has downlevel aitivirus.

Laptops brought home and plugged into the Internet do not have the same protected firewall levels as they do on the workplace network and can pick up viruses and worms. When they are brought back and plugged into the workplace network they can propagate the virus and worm. In essence the employee carries the virus past the corporate firewalls inside the laptop.

By the same situation, an employee at home may alter their laptop configurations to share file systems or route traffic to facilitate access to data and the internet by the employee's home computers. When the laptop in turn is plugged into the corporate network it has regressed its security level. This DAHP invention provides early detection and network disconnect of this situation

Dynamic Host Configuration Protocol (DHCP) leases an IP address to the laptop when it is plugged into the corporate network. This lease is commonly for a 24 hour period. If the laptop is still online at the end of this period, an extension of this lease is negotiated with the DHCP server, e.g. the DHCP server extends the IP address lease for another 24 hours. This is the current state of the art.

The way DAHP (DHCP Aided Hacker Prevention) works is t...