SMC Networks SMCBR21VPN - Manual (Page 197)

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Detect Ping of Death Attack:
„ Select this option to detect the attacks of tremendous trash data in PING
packets that hackers send to cause System malfunction. This attack can
cause network speed to slow down, or even make it necessary to restart the
computer to get a normal operation.
Detect IP Spoofing Attack:
„ Select this option to detect spoof attacks. Hackers disguise themselves as
trusted users of the network in Spoof attacks. They use a fake identity to
try to pass through the SMC BR21VPN System and invade the network.
Detect Port Scan Attack:
„ Select this option to detect the port scans hackers use to continuously scan
networks on the Internet to detect computers and vulnerable ports that are
opened by those computers.
Detect Tear Drop Attack:
„ Select this option to detect tear drop attacks. These 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 .
Filter IP Route Option:
„ Each IP packet can carry an optional field that specifies the replying address
that can be different from the source address specified in packet’s header.
Hackers can use this address field on disguised packets to invade LAN
networks and send LAN networks’ data back to them.