How to Create a VPC in Google Cloud: A Step-by-Step Networking Guide by Chadura Tech

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At Chadura Tech, we frequently witness businesses moving to Google Cloud without considering one of the most crucial elements: the Virtual Private Cloud (VPC). Isolation, secure communication, appropriate traffic control, and smooth integration with on-premises or multi-cloud environments are all guaranteed by a well-designed VPC.

This comprehensive guide explains how to create a VPC in Google Cloud, starting from fundamentals to advanced best practices, with a strong focus on real-world implementation from a Chadura Tech perspective. Whether you are a beginner or an experienced cloud engineer, this guide will help you design and deploy VPCs with confidence.

What Is a VPC in Google Cloud?

In Google Cloud, a Virtual Private Cloud (VPC) is a logically isolated virtual network that offers networking capabilities for your cloud resources, including databases, serverless services, Kubernetes clusters, and Compute Engine virtual machines.

In contrast to conventional data center networks, a GCP VPC is:

• Global (encompasses several regions)
• Extremely scalable
• Software-based
• Completely adaptable

Key Capabilities of Google Cloud VPC

• Define custom IP address ranges
• Create subnets per region
• Control traffic using firewall rules
• Enable private communication between services
• Connect securely to on-premises networks
• Support hybrid and multi-cloud architectures

At Chadura Tech, we treat VPC design as the backbone of cloud architecture, ensuring security, scalability, and long-term flexibility.

Why VPC Is Important in Google Cloud

The Virtual Private Cloud (VPC) in Google Cloud is like a safe, isolated network where you can execute and administer your cloud resources. A VPC supplies the user with absolute control over the flow of data, IP addressing, and connection, at the same time, it is compatible with flexible and trustworthy cloud architectures.

Creating a VPC is often the first step in any GCP project. Here’s why it is critical:

1. Network Isolation

Each VPC is isolated from others by default, ensuring secure separation of environments like development, testing, and production.

2. Security Control

With firewall rules, routing policies, and private IPs, VPCs allow fine-grained traffic control.

3. Scalability

Google Cloud VPCs scale automatically without requiring redesign.

4. Global Reach

A single VPC can span multiple regions, simplifying global application deployments.

5. Hybrid Connectivity

VPCs integrate seamlessly with on-premises networks using VPN or Dedicated Interconnect.

Types of VPC Networks in Google Cloud

1. Default VPC

• Automatically created with a new project
• Includes predefined subnets in each region
• Preconfigured firewall rules
• Suitable for learning and small workloads

2. Auto Mode VPC

• Subnets are automatically created per region
• Uses predefined IP ranges
• Limited customization
• Easy for quick deployments

3. Custom Mode VPC (Recommended by Chadura Tech)

• Full control over subnets and IP ranges
• Better security and scalability
• Ideal for production and enterprise workloads

Chadura Tech strongly recommends Custom Mode VPCs for professional environments.

Key Components of a Google Cloud VPC

Understanding the building blocks of a VPC helps you design better networks.

1. Subnets

• Regional IP address ranges
• Can be expanded without downtime
• Host Compute Engine resources

2. IP Addressing

• Uses CIDR notation (e.g., 10.0.0.0/16)
• Supports private and public IPs

3. Firewall Rules

• Control inbound and outbound traffic
• Stateful by default
• Applied at the network level

4. Routes

• Define how traffic flows
• Automatically created for subnets
• Custom routes supported

5. Peering and Connectivity

• VPC Peering
• Shared VPC
• Cloud VPN
• Cloud Interconnect

Prerequisites to Create a VPC in Google Cloud

Before you begin, ensure the following:

• A Google Cloud account
• An active GCP project
• Billing enabled
• Basic understanding of networking concepts
• IAM permissions (Network Admin or Owner)

Step-by-Step: How to Create a VPC in Google Cloud

Step 1: Log in to Google Cloud Console

Access the Google Cloud Console and select your project.

Step 2: Navigate to VPC Networks

Go to:

Navigation Menu → VPC network → VPC networks        

Step 3: Click “Create VPC Network”

This opens the VPC configuration page.

Step 4: Configure VPC Details

Network Name

Choose a meaningful name:

chadura-prod-vpc        

Subnet Creation Mode

Select:

• ✅ Custom

This gives you full control over IP addressing.

Step 5: Create Subnets

Add one or more subnets:

Example Configuration:

• Subnet Name: chadura-app-subnet
• Region: asia-south1
• IP Range: 10.10.0.0/24

You can add multiple subnets across regions as needed.

Step 6: Configure Firewall Rules

Choose whether to:

• Allow SSH
• Allow RDP
• Allow ICMP

At Chadura Tech, we recommend disabling default open rules and creating custom firewall policies later for better security.

Step 7: Enable or Disable Advanced Options

• Enable Private Google Access if required
• Enable VPC Flow Logs for monitoring
• Configure MTU if needed

Step 8: Create the VPC

Click Create. Your VPC network is now ready.

Creating a VPC Using gcloud CLI

For automation and DevOps workflows, CLI is preferred.

Create Custom VPC

gcloud compute networks create chadura-vpc \
--subnet-mode=custom        

Create a Subnet

gcloud compute networks subnets create chadura-subnet \

--network=chadura-vpc \

--region=asia-south1 \

--range=10.20.0.0/24        

Creating Firewall Rules for the VPC

Example: Allow SSH

gcloud compute firewall-rules create allow-ssh \

--network=chadura-vpc \

--allow=tcp:22 \

--source-ranges=0.0.0.0/0        

Best Practices for VPC Design (Chadura Tech Recommendations)

1. Use Custom Mode VPCs

Avoid auto mode for production.

2. Plan IP Addressing Carefully

Design CIDR ranges for future growth.

3. Separate Environments

Use different VPCs for dev, test, and prod.

4. Implement Least Privilege

Restrict firewall rules and IAM permissions.

5. Enable Logging and Monitoring

Use VPC Flow Logs and Cloud Monitoring.

• Google Cloud VPC Architecture : A secure and scalable virtual network that connects cloud resources across regions with full control over IPs, subnets, and traffic flow.                                                                                                                                                                  
• Custom VPC Network : Provides complete network isolation and customization for enterprise-grade Google Cloud deployments.
• Regional Subnets : Organize workloads by region to improve performance, availability, and latency optimization.
• Compute Engine (App VMs) : Runs application workloads securely inside private subnets without direct internet exposure.
• Cloud Load Balancer : Distributes traffic across multiple VMs to ensure high availability and fault tolerance 
•  Firewall Rules : Controls inbound and outbound traffic to protect cloud resources from unauthorized access
•  Cloud NAT : Enables private VMs to access the internet securely without assigning public IP addresses.
•  On-Premises Data Center : Represents existing enterprise infrastructure integrated with Google Cloud.
•  VPN / Interconnect : Provides secure, private connectivity between on-premises systems and Google Cloud VPC.
•  Use Shared VPC for Enterprises : Centralized networking with multiple projects.

Real-World Use Case: Chadura Tech VPC Design

At Chadura Tech, we design VPCs for:

• SaaS platforms
• FinTech applications
• Healthcare workloads
• AI and data analytics pipelines

Our approach focuses on:

• Security-first architecture
• Cost optimization
• Scalability and automation

Conclusion

Creating a VPC in Google Cloud is more than a technical task—it’s a strategic decision that impacts security, performance, and scalability. A well-planned VPC enables organizations to build reliable cloud infrastructure while maintaining control over networking and costs.

At Chadura Tech, we believe that strong cloud networking is the foundation of digital transformation. By following best practices, choosing custom VPCs, and planning ahead, businesses can unlock the full potential of Google Cloud.

If you’re planning a Google Cloud deployment or need help designing a secure and scalable VPC architecture, Chadura Tech is here to help.