We are deploying 2 new FTD 4100 chassis with 3 separate FTD instances. Do we need a separate physical management interface for each instance or can we create a sub-interface for each instance. Also, do we need an eventing interface for each FTD instance or can we use one physical interface for all eventing traffic for the 3 separate FTD instances.   Hope this is clear let me know if clarification is needed.   Thank you, John ... View more

To my knowledge Firepower does not use Telnet. When creating a session to the sfr module and running a netstat -an I see the sensor listening on port 23     sfr$ netstat -an tcp 0 0 0.0.0.0:23 0.0.0.0:* LISTEN   Can anyone tell me why this sensor is listening on tcp port 23 and if this can be turned off? This seems to be the defaut behavior.   Thanks ... View more