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Public IP address and CG-NAT

drbob
Level 6

I am wondering if random probing from the internet will go absolutely nowhere? I am thinking that it is probably when a device from "inside" initiates a connection that NAT table entries are created to enable return packets to be sent to the "inside" device that initiated the connection?

david64
Level 11

@drbob . You are correct about NAT table entries. Pings might be stopped at the firewalls because the external address doesn't relate to a real device. (Or the firewall responds to the ping.)