D-Link DES-3028 Product Manual - Page 242

DES-3028 DES-3028P DES-3028G DES-3052 DES-3052P Layer 2 Fast Ethernet Managed Switch Figure 10- 53. DoS Attack Prevention window The following parameters may be set. Parameter Description Type Select the type of attack from the list below or choose All to select all attack types. Land Attack - A Land attack works by sending a spoofed packet to a machine with the source host IP address the same as the destination host IP address, the system then attempts to reply to itself which causes the system to lock up. Blat Attack - A Blat attack works by sending a spoofed packet to a machine with the source host port the same as the destination host port, the system then attempts to reply to itself which causes the system to lock up. Smurf Attack - A Smurf attack works by sending PING requests to an Internet broadcast address which then broadcasts all the messages received to the hosts connected subnet causing network congestion. TCP Null Scan - A TCP Null Scan works by using a series of strangely configured TCP packets that contain no flags to identify listening TCP ports. This type of scan can penetrate some firewalls and boundary routers. TCP Xmascan - A TCP Xmascan works by using a series of strangely configured TCP packets that contain a sequence number of 0, FIN flags, Push (PSH), and Urgent (URG). This type of scan can penetrate some firewalls and boundary routers. 228