Google Certified Associate Cloud Engineer 2020

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Difference between ping-ing internal IP and external IP

Out of curiosity, what is the difference between ping-ing internal IP and external IP? At first, I thought the firewall rule (allow icmp on ingress) will allow us to ping both internal and external IPs but when I tried it out it didn’t work. Could you please shed some light on this? Thanks!

2 Answers

In my understanding if you would use service accounts as part of the rule – those will enable internal IPs to be in a state to allow icmp connection, but that won’t apply to external IPs and one will need to configure a rule that is not connected with service acc to enable external IP pinging eachother.

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