ICMP flood attack is one of the common DoS attacks, where a malicious user within the network will trigger a swarm of ICMP packets to a target host (such as a server):
Wireshark statistics can be used to identify whether there is any ICMP attack. The statistics can be viewed through Statistics | Protocol Hierarchy in the Wireshark header field. As shown in the preceding screenshot, there are 60,000 ICMP packets in a few seconds.
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