For Internet control message protocol
packets, the platform checks its static blocking rules to verify that the message type is allowed into the network.
ICMP -- Internet Control Message Protocol
: provides for messaging related to network operation or misoperation.
Unsubstantiated reports on DSLReports.com yesterday claimed that Level 3 had started blocking ICMP (internet control message protocol
) packets during the outage, which could be suggestive of DDoS countermeasures.
As another example, the widely used traceroute utility is not instrumented within IP but exploits the Internet control message protocol
(ICMP) "time exceeded" message in an unintended way.
-- The Internet Protocol (IP) and Internet Control Message Protocol
Some operating systems support ICMP (Internet Control Message Protocol
) in which the eavesdropper's computer can convince Alice's computer or Bob's computer that it is the correct router or that the packets should be sent through the eavesdropper's machine before it is sent to Bob's computer.