Edimax Technology BR-6428n - Manual (Page 171)

The descriptions of every setup item are listed below:
Item Name Description
Ping of Death Set the threshold of when this DoS prevention
mechanism will be activated. Please check the
box of Ping of Death, and input the frequency
of threshold (how many packets per second,
minute, or hour), you can also input the ‘Burst’
value, which means when this number of ‘Ping
of Death’ packet is received in very short time,
this DoS prevention mechanism will be
activated.
Discard Ping From
WAN Check the box to activate this DoS prevention
mechanism.
Port Scan Many kind of port scan methods are listed
here, please check one or more DoS attack
methods you want to prevent.
Sync Flood Like Ping of Death, you can set the threshold of
when this DoS prevention mechanism will be