You can perform Cisco ASA configuration using the following steps:
config t
flow-export destination inside {NETFLOW_SERVER_IP} {NETFLOW_SERVER_LISTENER_PORT}
flow-export template timeout-rate 1
flow-export delay flow-create 15
logging flow-export-syslogs disable
access-list netflow-export extended permit ip any any
class-map netflow-export-class
match access-list netflow-export
policy-map global_policy
class netflow-export-class
flow-export event-type all destination {NETFLOW_SERVER_IP}
exit