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:
Jan. 19, 2010
Filed:
Apr. 07, 2004
Amol Khare, Sunnyvale, CA (US);
Mitesh Dalal, Santa Clara, CA (US);
Anantha Ramaiah, Sunnyvale, CA (US);
Sharad Ahlawat, San Jose, CA (US);
Amol Khare, Sunnyvale, CA (US);
Mitesh Dalal, Santa Clara, CA (US);
Anantha Ramaiah, Sunnyvale, CA (US);
Sharad Ahlawat, San Jose, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A method of preventing an attack on a network, the method comprising the computer-implemented steps of receiving an ICMP packet that includes a copy of a header associated with a connection in a connection-oriented transport protocol; obtaining a packet sequence value from the header; determining if the packet sequence value is valid; and updating a parameter value associated with the transport protocol connection only if the packet sequence value is determined to be valid. Use of the disclosed method enables authenticating ICMP packets so that responsive measures of a network element, such as adjusting an MTU value, are performed only when the ICMP packet is determined to be authentic.