The earliest recollection of this bug is traced back to PAN-OS 10.1.10 - November 18, 2024. This bug is fixed in PAN-OS versions 10.2.5, 10.1.10, 11.0.1. Fixed an issue where, when a client sent a TCP/FIN packet, the firewall displayed the end reason as aged-out instead of tcp-fin . For more information: https://docs.paloaltonetworks.com/pan-os/10-1/pan-os-release-notes/pan-os-10-1-10-known-and-addressed-issues/pan-os-10-1-10-addressed-issues https://docs.paloaltonetworks.com/pan-os/10-2/pan-os-release-notes/pan-os-10-2-5-known-and-addressed-issues/pan-os-10-2-5-addressed-issues https://docs.paloaltonetworks.com/pan-os/11-0/pan-os-release-notes/pan-os-11-0-1-known-and-addressed-issues/pan-os-11-0-1-addressed-issues