'Protocol Operation' is the application protocol
specific operation that the PDU is intended to
perform. An example of 'protocol operation' is the
HELO command of SMTP protocol.
This MIB object records the number of application
protocol data units that contained a protocol operation
which was disallowed by the local security policy.
For this MIB to be implemented, the managed firewall
must be implementing deep packet inspection of
application traffic payloads.
This value is accumulated from the last reboot of
the firewall.