Patent ID: 11968174
Assignee: LEVEL 3 COMMUNICATIONS, LLC
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A method for blocking spoofed traffic within communications networks, the method comprising:
generating, at a computing system, a prefix list from routing information associated with an autonomous system of a communications network, the prefix list including a plurality of prefixes encompassing trusted addresses within the autonomous system; and
automatically distributing, in response to generating the prefix list, the plurality of prefixes from the computing system to a filter device within the communications network, the distributing for implementation of a filter rule at the filter device, the filter rule permitting network traffic originating from addresses within the plurality of prefixes,
wherein the filter device utilizes an interface filter implemented between the autonomous system of the communications network and an autonomous system of a second network that blocks network traffic that originates from IP addresses not within the one or more prefixes of the prefix list from the autonomous system of the second network.