enable netflow on cisco asa

https://supportforums.cisco.com/document/30476/configuring-netflow-asa-asdm

ASDM steps
Device Management > Logging > Netflow
Click Add
Fill in netflow collector server interface and port (usually 2055)

Firewall > Service Policy Rules.
Click Add
Global - applies to all interfaces
Check source and destination IP address (uses ACL)
next
source: any, user: any, destination: any, service: ip, description: netflow
next
Select flow event all, check the send box beside the ip address of the netflow collecter
Finish
Apply


CLI config
access-list global_mpc extended permit ip any any
!
flow-export destination inside 192.168.1.13 2055
!
class-map global_class
  match access-list global_mpc
!
policy-map global_policy
  class inspection_default
   inspect dns migrated_dns_map_1
     inspect ftp
     inspect h323 h225
     inspect h323 ras
     inspect netbios
     inspect rsh
     inspect rtsp
     inspect skinny
     inspect sqlnet
     inspect sunrpc
     inspect tftp
     inspect sip
     inspect xdmcp
     inspect icmp
  class global_class

flow-export event-type all destination 192.168.1.13