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Getting Started with FortiGate by Fabrizio Volpe, Rosato Fabbri

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FortiGate Session Life Support Protocol

FortiGate Session Life Support Protocol (FGSP) is used for traffic redundancy if a load balancer is already present in our network. Load balancing and session failover is done by the external balancer while two FortiGate units are integrated with it, to keep session synchronization (in a session table). TCP sessions (by default) and connectionless protocols like UDP and ICMP sessions (with an additional configuration) are able to failover from a unit to the other one with no data loss. Depending on the configuration of the balancer, all the network packets are sent to the primary unit and are directed to the secondary unit in case of a failure (like in the Active-Passive clusters) or the workload is balanced ...

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