How to Modify Virtual Network/Subnet Settings in Azure

To modify virtual network/subnet settings in Azure, you'll need to access the Azure portal. From there, navigate to the Virtual networks section and select the network you want to modify.

Azure allows you to create multiple virtual networks and subnets within each one, which can be useful for segregating resources or implementing network isolation.

To create a new subnet, simply click the "Subnets" tab and then click the "Add subnet" button.

You can then specify the subnet's IP address range, network address prefix, and other settings as needed.

To change the virtual network or subnet in an Azure VM, you'll need to meet some basic prerequisites.

You'll need an Azure account with an active subscription. If you don't have one, you can create an account for free.

To run the commands in this article, you'll also need an existing Azure virtual network. You can create one using the Azure portal or Azure CLI.

You can choose to run the commands in the Azure Cloud Shell or from your computer. If you're using the Azure Cloud Shell, it's a free interactive shell that has common Azure tools preinstalled. To access it, select Open Cloudshell at the upper-right corner of a code block.

If you prefer to run the commands from your computer, you'll need Azure CLI version 2.31.0 or later. You can check your installed version by running az version and upgrade if necessary.

To set up your Azure VM, you'll first need to create a virtual network dedicated to your Azure account. This is the fundamental building block where you can launch Azure resources.

Azure VNet is the networking layer of Azure VMs, and it spans all the Availability Zones in the region. After creating a VNet, you can add one or more subnets in each Availability Zone.

You can create a new virtual network in the cloud to house your Azure VM. This will give you a clean slate to work with.

To create a new virtual network, you can follow the steps outlined in the Azure Virtual Network Cheat Sheet. This will guide you through the process of creating a VNet and adding subnets.

Here are the key steps to create a virtual network:

Once you have your virtual network set up, you can proceed with launching your Azure VM.

To set up an Azure Virtual Network, you can create a virtual network in the cloud dedicated to your Azure account. This is the fundamental building block where you can launch Azure resources.

Azure VNet is the networking layer of Azure VMs, spanning all the Availability Zones in the region. After creating a VNet, you can add one or more subnets in each Availability Zone.

You can change subnet settings by selecting the virtual network, then selecting Subnets from the left navigation. From there, select the subnet you want to change settings for and update the subnet settings, then select Save.

The following settings can be changed after the subnet is created:

You can also change subnet settings by running the az network vnet subnet update command with the options you want to change, or by using the Set-AzVirtualNetworkSubnetConfig and Set-AzVirtualNetwork commands.

To change the DNS servers for your Azure VM, you can use the Azure portal or the Azure CLI. You can also use the Azure PowerShell to update the virtual network with new DNS server settings.

To change the DNS servers for a virtual network using the Azure portal, navigate to the Virtual networks page and select the virtual network you want to update. Then, select the DNS servers option under Settings and choose a new DNS server from the list.

You can also use the Azure CLI to update the virtual network with a new DNS server. Simply run the command `az network vnet update --resource-group myResourceGroup --name myVNet --dns-servers 10.0.0.10`.

To change the DNS servers for a network interface (NIC), you can use the Azure portal or the Azure CLI. To do this in the Azure portal, navigate to the Network interfaces page, select the NIC you want to update, and then select the DNS servers option from the left navigation.

Here are the steps to change the DNS servers for a NIC using the Azure CLI:

Alternatively, you can use the Azure PowerShell to update the NIC with a new DNS server. To do this, use the command `Set-AzNetworkInterface` to change the DNS server setting from inherited to a custom setting.

To remove the DNS servers and change the setting to inherit from the virtual network, use the Azure CLI command `az network nic update` or the Azure PowerShell command `Set-AzNetworkInterface` with the DNS server IP addresses set to empty.

To change your Azure VM's network security settings, you'll want to focus on the network security group (NSG). To associate or dissociate an NSG, head to the NIC's page and select Network security group in the left navigation.

From there, you'll select the NSG you want to associate or choose None to dissociate it. Then, simply select Save to apply the changes.

You can also use the command line to set the NSG for your NIC. Use az network nic update to make the change, or use Set-AzNetworkInterface if you prefer PowerShell.

Here are the steps in a concise format:

Changing the subnet of an Azure VM can be a bit tricky, but it's definitely doable. To start, you'll need to stop the VM first.

You can't directly reassign a VM's network interface (NIC) to a different subnet, so you'll need to create a new NIC and attach it to the VM. This new NIC will be attached to the desired virtual network and subnet.

To create the new NIC, you'll need to set up the necessary IP address configuration and any security rules required. This will ensure that your VM is properly configured to connect to the new subnet.

Once you've created and configured the new NIC, you'll need to attach it to the VM. This is a straightforward process, but make sure you follow the steps correctly to avoid any issues.

Here's a summary of the steps:

After you've successfully tested the new NIC, you can optionally detach the old NIC from the VM. This will free up any unnecessary resources and keep your VM organized.