Whether or not an attack is currently in progress on the
port.
None(0) means no attack is in progress.
If dosDefenseAttackType is SYNFlood(1), Suspected(1)
means a SYN Flood attack is suspected. A threshold has
not been set, and the default threshold of a SYN:ACK
ratio of 2:1 above 20 packets per second has been
reached.
If dosDefenseAttackType is PingOfDeath(2), Teardrop(5)
or Land(6), Suspected means that some suspect packets
have been received but have not yet been analysed to
determine if an attack exists.
InProgress(2) means an attack is in progress.