AirLive RS-3000 - Manual (Page 272)

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Tear Drop
The Tear Drop attacks are packets that are segmented to small packets with negative length. Some
Systems treat the negative value as a very large number, and copy enormous data into the System to
cause System damage, such as a shut down or a restart.
Detect Land Attack:
Some Systems may shut down when receiving packets with the same source and destination
addresses, the same source port and destination port, and when SYN on the TCP header is marked.
Enable this function to detect such abnormal packets.
DoS Attack
Denial of Service. A type of network attack that floods the network with useless traffic. Many DoS
attacks, such as the Ping of Death and Teardrop attacks, exploit limitations in the TCP/IP protocols.