Policy action is allow, but session-end-reason is "policy-deny" PAN 8.1.12

[STHONG]

Hi, All

The action of security policy is set to allow, but session-end-reason is shown as "policy-deny" in traffic monitor.

The PAN-OS version is 8.1.12 and SSL decryption is enabled.
Could someone please explain this to me?
If you need more information, please let me know.

[reaper]

there's several layers where sessions are inspected and where a poliy decission can be taken to drop connections

The session is first processed at layer 3 where it is allowed or denied based on source/destination IP, source/destination zone and destination port and protocol. Once a connection is allowed based on the 6tuple, the traffic log will be an allow action, but the session may later be dropped due to an expired certificate (if ssl decryption is enabled) or an application switch or a threat profile that simply drops the connection

at the far-left of the log entry there's a log details icon that will show you more details and any related logs. this may shed some light on the reason for the session to get ended

[STHONG]

Hi,

Thank you for your reply.
I checked the detailed log and found that the destination address is https://api.snapcraft.io, and the certificate of this address is not expired but normal.

And there were no blocked or denied sessions in the threat log.

Is there anything else I need to check?

Thanks in advance.

/STHONG