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SYN-bit's avatar
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SYN-bit
answered 2023-02-06 16:54:13 +0000

The fact that the "Protocol Unrechable" message comes back proves that the response does get back to the Client.

Looks like the OS of the client is not aware of the sending of the ICMP packet. Was the ICMP REQUEST packet generated by the ping command? Or by another program that is able to generate packets at a lower level?