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. 16, 2011
Filed:
Dec. 12, 2002
Jean-marc Berthaud, Villeneuve Loubet, FR;
Pascal Chauffour, Cagnes sur Mer, FR;
Jean-claude Dispensa, Saint Jeannet, FR;
Valerie Mahe, Nice, FR;
Jean-Marc Berthaud, Villeneuve Loubet, FR;
Pascal Chauffour, Cagnes sur Mer, FR;
Jean-Claude Dispensa, Saint Jeannet, FR;
Valerie Mahe, Nice, FR;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method of synchronizing firewalls in a communication system comprising a server farm wherein any user connected to the Internet can access customer servers, and at least two firewalls using a Virtual Router Redundancy Protocol (VRRP) to set up as primary interface firewall the firewall which owns the primary interface of the VRRP group of interfaces to at least one customer server. The method includes initializing, in a secondary interface firewall, a synchronization message exchange with the primary firewall after receiving a packet for a connection having a state which is incompatible with the received packet or after the standard firewall processing of a packet corresponding to a new connection, and registering in a common connection table the state of any connection if the connection is new or if the connection state has changed.