Electrical computers and digital processing systems: multicomput – Multicomputer synchronizing
Reexamination Certificate
2011-08-16
2011-08-16
Nguyen, Thuong T (Department: 2452)
Electrical computers and digital processing systems: multicomput
Multicomputer synchronizing
C709S249000, C709S218000, C709S229000, C709S203000, C726S005000, C726S011000, C726S006000, C713S152000, C370S349000, C370S252000, C370S401000
Reexamination Certificate
active
08001279
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.
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Berthaud Jean-Marc
Chauffour Pascal
Dispensa Jean-Claude
Mahe Valerie
Hoffman Warnick LLC
International Business Machines - Corporation
Nguyen Thuong T
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