I have an Cisco ASA 5520 running version 8.x, when viewing real-time logging set to debugging level, traffic passing through the firewall is NOT displayed. I clear all traffic filters by selecting show all but still no traffic is displayed in the real-time logging window.
I can see the traffic on the next hop device and this verifies traffic is passing through the firewall.
Is there a problem with the logging feature on the ASA 5520 running OS ver 8 or is CEF preventing the display from showing real-time traffic?
I realize I could just look at the next hop to determine if traffic is flowing through the firewall, but sometimes specific traffic is blocked by the ACL rule sets on the firewall and I need to see this action in real-time.