The UDP port scan threshold interval is in microseconds. The default
threshold value is 5000. The valid threshold range is 1000-1000000.
By using the default settings, if a remote host scans 10 ports in
0.005 seconds (5000 microseconds), the device flags this as a
udp port scan attack, and rejects all further packets from the remote
source for the remainder of the specified timeout period. The
device detects and drops the tenth packet that meets the port scan
attack criterion.
This attribute displays the UDP port scan threshold value.