10Chapter168Advanced SettingsFlow timeout settingsThe settings in this section specify how long a different types of flow can remain idle beforebeing automatically closed. A flow is idle if no data being sent through it. Please note thateach flow has two timeout values: one for each direction. A connection is closed if either ofthe two values reaches zero.Idle TCP SYN Flow LifetimeSpecifies in seconds how long a TCP flow that is not yet fully established is allowed to idlebefore being closed.Device:/> set Settings FlowTimeoutSettings FlowLifetimeTCPSync=60Default: 60Idle Established TCP Flow LifetimeSpecifies in seconds how long a fully established TCP flow may idle before being closed. Flowsbecome fully established once packets with their SYN flags off have travelled in bothdirections.Device:/> set Settings FlowTimeoutSettings FlowLifetimeEstablished=262144Default: 262,144Idle Closing TCP Flow LifetimeSpecifies in seconds how long a closing TCP flow may remain idle before finally being closed.Flows reach this state when a packet with its FIN flag on has passed in any direction.Device:/> set Settings FlowTimeoutSettings FlowLifetimeTCPClosing=80Default: 80Idle UDP Flow LifetimeSpecifies in seconds how long UDP flows may idle before being closed. This timeout value isusually low, as UDP has no way of signalling when the flow is about to close.Device:/> set Settings FlowTimeoutSettings FlowLifetimeUDP=130Default: 130Idle ICMP Flow LifetimeSpecifies in seconds how long an ICMP flow (for example, an ICMP ECHO) can remain idlebefore it is closed.Device:/> set Settings FlowTimeoutSettings FlowLifetimeICMP=8Default: 8