Step-by-Step – Create a Secure Azure VNet

Step-by-Step – Create a Secure Azure VNet

🧱 What is a VNet?

A Virtual Network (VNet) is Azure’s foundational building block for securely connecting your VMs, services, and workloads. Think of it as your private data center in the cloud—with full control over IP ranges, routing, and segmentation.

---

🪜 Step-by-Step: How to Create a VNet in Azure

1️⃣ Go to Azure Portal

Visit portal.azure.com and sign in.

2️⃣ Navigate to Virtual Networks

Search for “Virtual Networks” in the top search bar and click + Create.

3️⃣ Configure Basics

• Subscription / Resource Group: Choose accordingly
• Name: e.g., Prod-VNet-EastEU
• Region: Select the region close to your workloads

---

4️⃣ Define IP Address Space

• Use CIDR notation (e.g., 10.0.0.0/16)
• Avoid overlapping address spaces if planning to peer VNets later

---

5️⃣ Add Subnets

Split your VNet into logical subnets:

• 10.0.0.0/24 for Web Servers
• 10.0.1.0/24 for Application Tier
• 10.0.2.0/24 for Database

---

🔐 Step 6: Apply NSGs (Network Security Groups)

Security starts with segmentation. For each subnet:

✅ Create or assign a dedicated NSG
✅ Only allow required ports (e.g., 443, 1433, 22)
✅ Deny all other inbound traffic by default
✅ Restrict RDP/SSH to specific IPs or regions

💡 Subnet-level NSGs are preferred for layered protection. You can apply NSGs to both subnets and individual NICs.

---

🧭 Finalize

7️⃣ Enable DDoS Standard protection (if licensed)
8️⃣ (Optional) Add tags for cost and security tracking
9️⃣ Click Review + Create, then Create

---

✅ Alcaeus Tip

Design your IP ranges with future peering in mind. Don’t reuse overlapping CIDRs unless you love troubleshooting.

---

Need help designing secure cloud networks?
📩 Reach out to Alcaeus Services—we’ll map and secure your Azure architecture the right way.