Create firewall rules
Prior to registering an environment in CDP, you must have firewall rules that fulfill the requirements. This is not optional.
You can add firewall rules in Google Cloud directly at the VPC level or via the security access control mechanism from VPC network > Firewall > Create firewall rule. For instructions on how to create and manage firewall rules in GCP, refer to Using firewall rules in Google documentation.
Make sure that your firewall rules meet the requirements mentioned in Firewall rules.