Electrical computers and digital processing systems: multicomput – Computer-to-computer protocol implementing – Computer-to-computer handshaking
Reexamination Certificate
2008-04-01
2008-04-01
Coulter, Kenneth R. (Department: 2141)
Electrical computers and digital processing systems: multicomput
Computer-to-computer protocol implementing
Computer-to-computer handshaking
C709S245000, C726S026000, C726S004000
Reexamination Certificate
active
07353290
ABSTRACT:
An in-band signaling method that enables secure updates of a care-of-IP address for a mobile host that roams between access networks. In the illustrative embodiment described herein, a mobile host includes an intelligent interface that handles IP networking functions and tunnels IP packets between the mobile host and the mobile host's home agent/remote access server (HA/RAS) transparently, as if the mobile host established a connection to a communicating or destination host (DST) from the home network (where the HA/RAS resides). In accordance with an aspect of the invention, there is provided an in-band signaling method that employs encrypted three-way handshake signaling messages that are embedded in encapsulated IP packets to enable care-of IP address updates. This method can effectively protect mobile hosts from denial-of-service attacks and is transparent to NAT/NAPT firewalls. The signaling messages are communicated between the home agent and the mobile host, in a manner transparent to any NAT/NAPT firewall in the network.
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Charles E. Perkins et al.; Mobility Support in IPv6; Proceedings of the 2ndAnnual International Conference on Mobile Computing and Networking; pp. 27-37; Nov. 1996.
AT&T Corporation
Coulter Kenneth R.
Haynes Michael N.
Jensen Dale R.
Michael Haynes PLC
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