You can create a public subnet in Azure using the Azure portal, Azure CLI, or Azure PowerShell. Here's a step-by-step guide using the Azure portal:
Creating a Public Subnet in Azure Portal
- Log in to the Azure portal: Navigate to the Azure portal and log in using your Azure account.
- Navigate to your Virtual Network: Search for "Virtual Networks" in the search bar and select the virtual network you want to work with.
- Select Subnets: In the virtual network overview, click on "Subnets" under "Settings."
- Create a Subnet: Click on the "+ Add" button to create a new subnet.
- Configure Subnet:
- Name: Enter a unique name for your subnet.
- Address range: Enter a valid IP address range for your subnet.
- Subnet type: Choose "Public" from the drop-down menu.
- Service endpoints: Select "None" or specify any required service endpoints.
- Review and Create: Review your settings and click "Create" to create the public subnet.
Important Points to Consider:
- Public IP addresses: Public subnets allow virtual machines (VMs) within them to have public IP addresses, making them accessible from the internet.
- Network Security Groups (NSGs): You can associate an NSG with your public subnet to control network traffic in and out of the subnet.
- Service Endpoints: Service endpoints enable secure access to Azure services directly from your virtual network.
- Azure Firewall: Azure Firewall is a managed firewall service that can be deployed in front of your public subnet to provide advanced security.
Example:
Let's say you want to create a public subnet named "PublicSubnet" with an address range of 10.0.0.0/24 in your virtual network "MyVirtualNetwork." You would follow the steps outlined above, entering "PublicSubnet" as the name, "10.0.0.0/24" as the address range, and selecting "Public" as the subnet type.
By following these steps, you can successfully create a public subnet in Azure, enabling your VMs to connect to the internet and receive traffic from external sources.
