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:
Aug. 03, 2010
Filed:
Oct. 30, 2006
Chris O'rourke, Apex, NC (US);
Gaurang K. Shah, Cary, NC (US);
Louis F. Menditto, Raleigh, NC (US);
Mark Albert, Morrisville, NC (US);
Michael S. Sutton, Garner, NC (US);
Pranav K. Tiwari, Raleigh, NC (US);
Robert M. Batz, Raleigh, NC (US);
Richard Gray, Cary, NC (US);
Sean W. Hull, Raleigh, NC (US);
Tzu-ming Tsang, Chapel Hill, NC (US);
Chris O'Rourke, Apex, NC (US);
Gaurang K. Shah, Cary, NC (US);
Louis F. Menditto, Raleigh, NC (US);
Mark Albert, Morrisville, NC (US);
Michael S. Sutton, Garner, NC (US);
Pranav K. Tiwari, Raleigh, NC (US);
Robert M. Batz, Raleigh, NC (US);
Richard Gray, Cary, NC (US);
Sean W. Hull, Raleigh, NC (US);
Tzu-Ming Tsang, Chapel Hill, NC (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A method for protecting firewall load balancers from a denial of service attack is provided. Packets are received by the firewall load balancer. Each packet has a source and a destination. The firewall load balancer is equipped with a connection database that can contain entries about the packets. Upon receipt of a packet, the connection database is queried to determine whether or not there is an entry for the received packet. If an entry is found in the database, the packet is forwarded to its destination. Otherwise, if the packet was received from a firewall, then a new connection entry for the packet is built and is saved to the connection database and the packet is forwarded on to its destination. If the packet does not have an entry (match) in the connection database and the packet was not received from a firewall, then the packet is forwarded to a firewall.