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DEFENDO is fault-tolerant via

hard disc mirroring

  • already included in DEFENDO "large" and "Enterprise"
  • optional for Rack-Server
The availability of the illustrated functions and features varies depending on the model

fallback for Internet connection

  • automatic swap to backup line in case of ISP connection loss
  • optional: UMTS/LTE stick providing fallback over mobile network
  • backup line may also be used permanently for specific protocols (like HTTP and HTTPS), taking load off main ISP connection
The availability of the illustrated functions and features varies depending on the model

failover cluster

  • two DEFENDO systems linked as an active/passive cluster
  • addressed by DNS alias, passive system may run certain services to take load off the active system
The availability of the illustrated functions and features varies depending on the model