This read-write enumerated value sets the switch's default packet-handling behavior for when neither the Primary nor Backup manager defined in this firewall configuration can be reached. Admins choose blocked(1) to fail closed, dropping all traffic, or open(2) to fail open and allow all packets through, trading security for availability during a manager outage. For example, a security-conscious admin managing a sensitive segment would set xylanFwMode to blocked(1) so the switch stops passing traffic if it loses contact with both its Primary and Backup managers.