AzureConceptBeginner · 4 min read

What is VPN Gateway in Azure: Simple Explanation and Example

An Azure VPN Gateway is a service that securely connects your on-premises network or other cloud networks to your Azure virtual network using encrypted tunnels. It acts like a secure bridge over the internet, allowing safe data transfer between different networks.

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How It Works

Think of an Azure VPN Gateway as a secure tunnel between two places. Imagine you want to send a secret letter from your home to a friend's house far away. Instead of sending it openly where anyone can read it, you put it inside a locked box that only your friend can open. The VPN Gateway works like that locked box, encrypting your data so only the intended network can read it.

It connects your local network or other cloud networks to your Azure virtual network by creating encrypted tunnels over the internet. This means your data travels safely even though the internet is a public space. The gateway manages these tunnels and ensures data is sent and received securely.

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Example

This example shows how to create a basic Azure VPN Gateway using Azure CLI. It sets up a virtual network, a gateway subnet, and then the VPN gateway itself.

bash

az network vnet create --resource-group MyResourceGroup --name MyVNet --address-prefix 10.0.0.0/16 --subnet-name GatewaySubnet --subnet-prefix 10.0.255.0/27

az network public-ip create --resource-group MyResourceGroup --name MyVpnGatewayPublicIP --allocation-method Dynamic

az network vpn-gateway create --resource-group MyResourceGroup --name MyVpnGateway --public-ip-address MyVpnGatewayPublicIP --vnet MyVNet --gateway-type Vpn --vpn-type RouteBased --sku VpnGw1 --no-wait

Output

Creating virtual network 'MyVNet' with subnet 'GatewaySubnet'... Creating public IP 'MyVpnGatewayPublicIP'... Creating VPN gateway 'MyVpnGateway'... Deployment started successfully.

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When to Use

Use an Azure VPN Gateway when you need to securely connect your on-premises network or other cloud networks to your Azure virtual network. It is ideal for:

Extending your company network to Azure for hybrid cloud setups.
Connecting multiple Azure virtual networks across regions.
Allowing remote users to securely access Azure resources.

For example, a company with offices in different cities can use VPN Gateway to connect their local networks to Azure, enabling employees to access shared resources securely.

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Key Points

VPN Gateway creates encrypted tunnels over the internet for secure network connections.
It supports site-to-site, point-to-site, and VNet-to-VNet connections.
Requires a dedicated subnet called GatewaySubnet in your virtual network.
Different SKUs offer various performance and features.

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Key Takeaways

Azure VPN Gateway securely connects your networks using encrypted tunnels over the internet.

It is essential for hybrid cloud setups and secure remote access to Azure resources.

You must create a GatewaySubnet in your virtual network before deploying a VPN Gateway.

VPN Gateway supports multiple connection types like site-to-site and point-to-site.

Different SKUs allow you to choose the right performance and features for your needs.