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StoneGate Firewalls and IPS sensors have built-in clustering and load balancing that removes the
need for third-party clustering solutions.
Clustering ensures high availability of the security engines, thus allowing uninterrupted operations during system maintenance and updates.
StoneGate's built-in load balancing capabilities allow security engines to dynamically balance connections between cluster nodes, transparently transfering connections to available nodes in case a node becomes overloaded or fails. The way the load balancing is designed allows using engine nodes with different hardware in the cluster.
The clustering and load-balancing technologies in StoneGate security engine have evolved from
Stonesoft's StoneBeat products.
Drop-In Firewall Clustering (DFC) is a new mode of operation introduced with StoneGate 2.2.
DFC technology eliminates complex configuration requirements for clustered firewalls, enabling
security administrators to effectively "drop" a firewall cluster into their existing network
infrastructure.
While StoneGate's built-in load-balancing capability has always eliminated the need for external load-balancing devices, this new version improves operational efficiencies by easing coordination between security and network administrators.
In DFC mode, one cluster node receives all the traffic send to a given IP address. Since this is the standard mode of operation for a switch, special configuration of the network is not needed. The receiving StoneGate engine forwards the traffic to the other nodes for processing.
Move to a high-availability clustered firewall scheme without any additional reconfiguring of existing switches or routers. Drop-In Firewall Clustering neatly sidesteps the typical configuration difficulties encountered when setting up a firewall cluster.
If it is not possible to use Drop-In Firewall Clustering, StoneGate Firewall engines can also be clustered also using unicast MAC addresses, multicast MAC address associated with a unicast IP address, or Multicast MAC address in combination with IGMP.