The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 30, 2008
Filed:
May. 06, 2004
Anantha Ramaiah, Sunnyvale, CA (US);
Shrirang Bage, Fremont, CA (US);
Amol Khare, Sunnyvale, CA (US);
Mitesh Dalal, Santa Clara, CA (US);
Anantha Ramaiah, Sunnyvale, CA (US);
Shrirang Bage, Fremont, CA (US);
Amol Khare, Sunnyvale, CA (US);
Mitesh Dalal, Santa Clara, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
Approaches for preventing TCP RST attacks intended to cause denial of service in packet-switched networks are disclosed. In one approach, upon receiving a TCP RST packet, an endpoint node determines whether the TCP segment contains valid authentication information. The TCP RST segment is accepted and the TCP connection is closed only when the authentication information is valid. Authentication information may comprise a reset type values, and either initial sequence numbers of both endpoints, or a copy of a TCP header and options values previously sent by the endpoint node that is performing the authentication. Thus, attacks are thwarted because an attacker cannot know or reasonably guess the required authentication information.