After you configure log forwarding to Log Collectors, managed firewalls open a TCP connection to all configured Log Collectors. These connections timeout every sixty (60) seconds and do not indicate that the firewall has lot connection to the Log Collectors. When you configure log forwarding to a local or Dedicated Log Collectors over an ethernet interface, the firewall traffic logs show
incomplete
sessions despite the firewall being able to successfully connect to the Log Collectors. If you configure log forwarding over the management port, no traffic logs showing
incomplete
sessions are generated. Traffic logs showing
incomplete
sessions are generated by all firewalls except for the PA-5200 and PA-7000 series firewalls.