NANOG Meeting Presentation Abstract

CenterTrack: An IP Overlay Network for Tracking DoS Floods
Meeting:	NANOG17
Date / Time:	1999-10-05 2:00pm - 2:45pm
Room:
Presenters:	Speakers: Robert Stone, UUNET.
Abstract:	Finding the source of forged IP datagrams in a large, high-speed network is difficult due to the design of the IP protocol and the lack of sufficient capability in most high-speed, high-capacity router implementations. Typically, not enough of the routers in such a network are capable of performing the packet forwarding diagnostics required for this task. As a result, tracking down the source of a flood-type denial-of-service (DoS) attack is usually difficult or impossible. CenterTrack is an overlay network, consisting of IP tunnels, that is used to selectively reroute interesting datagrams directly from edge routers to special tracking routers. The tracking routers can easily determine the ingress edge router by observing which tunnel the datagrams arrive on. The datagrams can be examined, then dropped or forwarded to the appropriate egress point. This system simplifies the work required to determine the ingress adjacency of a flood attack while bypassing any equipment which may be incapable of performing the necessary diagnostic functions.
Files:	Robert Stone Presentation(PPT)
Sponsors:	None.

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