MikroTik RouterOS
Access the router CLI
Enable Traffic Flow
/ip traffic-flow set enabled=yesConfigure Traffic Flow settings
/ip traffic-flow target add address=x.x.x.x:yyyy version=10
/ip traffic-flow interfaces add interface=INTERFACE_NAMEOptional
/ip traffic-flow set cache-entries=4096 active-flow-timeout=1m inactive-flow-timeout=15s