Private Service Connect with Global Access for Hybrid Services

What Private Service Connect with Global Access Is

Private Service Connect (PSC) is a cloud-native networking feature that allows service producers to publish services via an internal load balancer, and service consumers to access those services privately using internal IP addresses assigned to endpoints or forwarding rules within their own VPC network. When global access is enabled on a consumer PSC endpoint, clients in any Google Cloud region as well as hybrid clients connecting from on-premises networks via Cloud Interconnect or Cloud VPN can route traffic directly to the endpoint.

How It Meets the Requirements

• Preventing Network Exposure and IP Collisions: Private Service Connect exposes only the specific published service endpoint rather than entire subnet CIDRs. Traffic is translated using source NAT (SNAT) through PSC subnets, completely eliminating issues caused by overlapping RFC 1918 IP address spaces.
• Multi-Region and On-Premises Connectivity: By enabling global access on the regional PSC endpoint in the central consumer VPC, on-premises systems connected via Dedicated Interconnect and VMs deployed in other cloud regions can seamlessly reach the endpoint's private IP.
• Minimizing Operational Overhead: PSC provides fully managed, hardware-accelerated routing at the Google infrastructure layer without requiring management of custom proxy VMs, Network Virtual Appliances (NVAs), or complex route exchange rules.

Key Advantages and Capabilities

• Service-Level Granularity: Establishes strict zero-trust boundaries by granting access to an individual application rather than opening complete Layer 3 network connectivity.
• Hybrid Ingress Support: Allows on-premises clients to access consumer endpoints across hybrid interconnect attachments.
• Native SNAT Handling: Manages source address translation automatically using dedicated PSC subnets while optionally retaining original client IP metadata via PROXY protocol.
• Administrative Isolation: Decouples producer infrastructure lifecycle management from consumer network topologies.

Why This Is Optimal

Unlike VPC Network Peering, which requires unique, non-overlapping IP space and exposes entire network topologies, PSC establishes targeted, unidirectional service access. Combined with global access, it fulfills all multi-region and hybrid requirements natively without the operational burden of managing routing appliances.