Preventing asynchronous ARP cache poisoning of multiple hosts

Details Preventing asynchronous ARP cache poisoning of multiple hosts Preventing asynchronous ARP cache poisoning of multiple hosts

2004-10-21

2008-12-30

Nguyen, Chau (Department: 2619)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S401000

Reexamination Certificate

active

07471684

ABSTRACT:
A method and system for preventing address resolution protocol (ARP) cache poisoning in a network system with multiple hosts. Multiple hosts representing and/or located in separate local area networks (LANS) are tapped (via a shared agreement) to utilize a trusted ARP cache for each LAN represented. Whenever a new ARP response is detected in one network, a request for validation is sent to a separate host in a different network. The separate host initiates a verification process for the ARP, which involves checking whether duplication of one of the IP address or MAC address of the ARP response exists within the address pairings in the ARP cache. If the ARP response is not validated, then the trusted ARP cache is not updated and the system administrator is notified of the failed attempt.

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