1 Answers
Hello Mohan,
1. When you created the firewall rule, how did you link it to the VM instances, by assigning it to a subnet -all targets- in your custom VPC network or using network tags/service account.
2. When you created the firewall rule, did you allow ingress traffic from 0.0.0.0, which allows any IP range to ping the instance?
Needs a bit more information on your configuration settings.
Regards,
Karlos