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Filter and Firewall
Left running head:
Chapter name (automatic)
610
Beta
Beta
OmniAccess 700 CLI Command Reference Guide
Alcatel-Lucent
ICMP
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ROUTER
-
ADVERTISEMENT
icmp-router-advertisement
D
ESCRIPTION
Remote attackers can spoof these ICMP packets and remotely add bad default-
route entries into a victims routing table. Since the victims’ systems would be
forwarding the frames to the wrong address, it would be unable to reach other
networks.
P
ARAMETERS
None.
E
XAMPLE
ALU(config-firewall-attack-A1)# icmp-router-advertisement
ICMP
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SMURF
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ATTACK
icmp-smurf-attack
D
ESCRIPTION
An assault on a network that floods it with excessive messages in order to impede
normal traffic. It is accomplished by sending ping requests (ICMP echo requests)
to a broadcast address on the target network or an intermediate network. The
return address is spoofed to the victim's address. Since a broadcast address is
picked up by all nodes on the subnet, it functions like an amplifier, generating
hundreds of responses from one request and eventually causing a traffic
overload.
P
ARAMETERS
None.
E
XAMPLE
ALU(config-firewall-attack-A1)# icmp-smurf-attack
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