Google Cloud Platform Professional-Cloud-Network-Engineer Question # 23 Topic 3 Discussion

When integrating on-premises networks with VPC Service Controls for private access to Google APIs, the recommended approach involves using Private Google Access for Hybrid Connectivity and configuring DNS resolution to the restricted.googleapis.com domain. This domain resolves to the 199.36.153.8/30 IP address range. It's crucial to advertise this range from Google Cloud to your on-premises routers so that on-premises clients can route traffic to the Google APIs privately. Additionally, to allow your on-premises network to access the APIs within the VPC Service Controls perimeter, you must define an access level that includes the IP address range of your on-premises network.

Exact Extract:

"To enable private access to Google APIs and services from on-premises networks protected by a VPC Service Controls perimeter, you must configure Private Google Access for Hybrid Connectivity."

"For on-premises hosts, configure your DNS to resolve *.googleapis.com to restricted.googleapis.com. The restricted.googleapis.com domain resolves to the IP address range 199.36.153.8/30."

"You must advertise the 199.36.153.8/30 range from your Cloud Routers to your on-premises routers through BGP."

"To allow on-premises networks to access protected resources within a VPC Service Controls perimeter, you must define an access level that includes the on-premises network's IP ranges. This access level is then applied to the service perimeter."Reference: Google Cloud VPC Service Controls Documentation - Private connectivity to Google APIs, Private Google Access for Hybrid Connectivity