Discard interface for diffusing network attacks

Details Discard interface for diffusing network attacks Discard interface for diffusing network attacks

2011-03-01

2011-03-01

Rao, Seema S (Department: 2462)

Multiplex communications

Diagnostic testing

C370S422000, C726S022000

Reexamination Certificate

active

07898966

ABSTRACT:
A router detects a network attack and forwards traffic associated with the network attack to a discard interface. The router applies one or more filters to calculate traffic flow statistics for the traffic forwarded to the discard interface. The router may exchange routing communications with one or more other routers to alert the routers of the network attack. For example, the router may generate a routing communication in accordance with a routing protocol that advertises a route to the targeted device, and includes a policy tag that indicates the existence of a network attack. The other routers update forwarding information in accordance with the advertised route, and automatically forward traffic to respective discard interfaces based on the policy tag, thereby diffusing the network attack.

REFERENCES:
patent: 6704874 (2004-03-01), Porras et al.
patent: 2004/0250124 (2004-12-01), Chesla et al.
patent: 2005/0007952 (2005-01-01), Scott

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