25. VPC Network Certification and Training

VPC network certification and training programs, such as the Google Cloud Professional Cloud Network Engineer certification, can help you gain the skills and knowledge required to design, implement, and manage VPC networks effectively.

By exploring these additional topics, you can gain a more comprehensive understanding of Google Cloud VPC and how to optimize its features to meet your organization’s unique requirements. This will enable you to build secure, high-performance networks that support your applications and infrastructure on Google Cloud Platform.

26. VPC Network Topologies

Google Cloud VPC Network Topologies determine how networks are interconnected and how they communicate. There are several common topologies, including:

• Hub-and-spoke: In this topology, a central VPC network (hub) is connected to multiple VPC networks (spokes) through VPC peering. This topology simplifies management and reduces the number of peering connections required. The hub network typically contains shared services, and the spoke networks contain project-specific resources.
• Full mesh: In this topology, every VPC network is directly connected to every other VPC network through VPC peering. While providing direct communication between all networks, it can become complex to manage as the number of networks increases.
• Hybrid: In this topology, organizations connect their on-premises networks to Google Cloud VPC networks, usually through Cloud VPN or Cloud Interconnect. This allows seamless communication between on-premises resources and Google Cloud resources.
• 27. Network Address Translation (NAT) in VPC
• Network Address Translation (NAT) allows instances without public IP addresses to access the internet by translating their private IP addresses into a public IP address. Google Cloud VPC uses Cloud NAT, a managed NAT service, to achieve this. To configure and manage Cloud NAT.

1. Create a Cloud Router. CLI Command: gcloud compute routers create
2. Create a NAT configuration on the Cloud Router. CLI Command: gcloud compute routers nats create
3. Assign instances to use Cloud NAT by either removing their public IP addresses or configuring their network tags.

• 28. VPC Service Controls

VPC Service Controls provide a security layer around your Google Cloud resources, creating a perimeter that helps protect against data exfiltration. By defining security perimeters, you can control access to specific services and resources. To configure and manage VPC Service Controls:

1. Create an access policy. CLI Command: gcloud access-context-manager policies create
2. Define a perimeter with the required services and projects. CLI Command: gcloud access-context-manager perimeters create
3. Configure ingress and egress rules to control data flow across the perimeter.

29. VPC Traffic Mirroring

VPC Traffic Mirroring allows you to capture and inspect network traffic from your Google Cloud instances. This is useful for monitoring, troubleshooting, and securing your network. Traffic Mirroring can be achieved using third-party tools like Wireshark or tcpdump. To enable VPC Traffic Mirroring, you need to:

1. Configure the instances to forward traffic to a collector instance.
2. Install and configure a traffic analysis tool on the collector instance, such as Wireshark or tcpdump.
3. Analyze the captured traffic to identify patterns, issues, or security incidents.

30. VPC Peering

VPC Peering allows you to establish private, low-latency network connections between two VPC networks in Google Cloud or between a Google Cloud VPC network and a VPC network in another cloud provider. With VPC Peering, you can share resources and services across networks without the need for VPNs or public IPs. To set up VPC Peering:

1. Configure the peering connection in both VPC networks. CLI Command: gcloud compute networks peerings create
2. Update firewall rules and routing configurations, if necessary, to allow traffic between the peered networks.

31. Cloud VPN

Cloud VPN enables you to securely connect your on-premises network to your Google Cloud VPC network through an IPsec VPN connection. This allows you to extend your network infrastructure and access Google Cloud resources as if they were on your local network. To set up Cloud VPN:

1. Create a VPN gateway in your Google Cloud VPC network. CLI Command: gcloud compute vpn-gateways create
2. Set up a VPN tunnel between the VPN gateway and your on-premises VPN gateway. CLI Command: gcloud compute vpn-tunnels create
3. Configure routing and firewall rules to allow traffic between your on-premises network and your Google Cloud VPC network.

32. VPC Flow Logs

VPC Flow Logs enable you to collect and analyze network traffic data for your Google Cloud VPC network. This helps you monitor and troubleshoot network issues, identify security risks, and optimize network performance. To enable VPC Flow Logs:

1. Configure VPC Flow Logs on the desired subnets in your VPC network. CLI Command: gcloud compute networks subnets update
2. Access and analyze the flow logs in Cloud Logging or export them to Cloud Storage, BigQuery, or Pub/Sub for further analysis.

33. Shared VPC

Shared VPC allows you to centrally manage and share a VPC network across multiple projects in your Google Cloud organization. This enables you to provide consistent network policies and resources while isolating project-specific workloads. To set up a Shared VPC:

1. Choose a host project that will contain the shared VPC network and create the VPC network. CLI Command: gcloud compute networks create
2. Configure the shared VPC network and enable sharing with other projects. CLI Command: gcloud compute shared-vpc enable
3. Add service projects that can use the shared VPC network and configure their permissions. CLI Command: gcloud compute shared-vpc associated-projects add

34. Private Google Access

Private Google Access allows instances without public IP addresses in your Google Cloud VPC network to access Google APIs and services. This enhances the security of your instances by reducing their exposure to the internet. To enable Private Google Access:

1. Configure the subnet to enable Private Google Access. CLI Command: gcloud compute networks subnets update
2. Set up a Cloud NAT or Private Google Access-specific route to allow instances to reach Google APIs and services.

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