Method for blocking denial of service and address spoofing...

Details Method for blocking denial of service and address spoofing... Method for blocking denial of service and address spoofing...

2004-03-24

2010-11-16

Parthasarathy, Pramila (Department: 2436)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular node for directing data and applying cryptography

C713S153000, C713S151000, C709S225000, C709S224000

Reexamination Certificate

active

07836296

ABSTRACT:
A method is provided for blocking attacks on a private network (12). The method is implemented by a routing device (10) interconnecting the private network (12) to a public network (14). The method includes analyzing an incoming data packet from the public network (14). The incoming data packet is then matched against known patterns where the known patterns are associated with known forms of attack on the private network (12). A source of the data packet is then identified as malicious or non-malicious based upon the matching. In one embodiment, one of the known forms of attack is a denial of service attack and an associated known pattern is unacknowledged data packets. In another embodiment, one of the known forms of attack is an address spoofing attack and an associated known pattern is a data packet having a source address matching an internal address of the private network (12).

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