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The Method for preventing unauthorized network access by occupying idle IP addresses

IP.com Disclosure Number: IPCOM000015961D
Original Publication Date: 2002-Nov-01
Included in the Prior Art Database: 2003-Jun-21

Publishing Venue

IBM

Abstract

Idea of disclosure 1. Describe your invention, stating problem solved (if appropriate), and indicating the advantages of using the invention. The Resouce X manages idle IP addresses in a IP sub network. Resource X registers all IP adresses which are not assigned by DHCP servers or network administrator, to its Network interfaces. This prevents to access by unauthorized users, because all IP addresses are occupied. User should register his MAC address of NetWork Interface Card(NIC) on List of acceptable MAC addresses using IP addresses, before user begins to use new IP address. Resource X release one IP address and assign it to user. If user has non-registered MAC address, user cannot use IP address, because there is no idle IP address in a sub network. It prevents to use network resources by unauthorized users. Administrator does not care idle IP addresses in general. Router can block to access over sub network by its configuration, but router cannot block to access in its sub network. Any user can set idle IP address to his NIC manually, can easily use network resources in its sub network. It is easy to crack network resources. It is needed to countermeasure against unauthorized access.