Dissociate a public IP address from an Azure VM

Article
08/24/2023

In this article, you learn how to dissociate a public IP address from an Azure virtual machine (VM).

You can use the Azure portal, the Azure CLI, or Azure PowerShell to dissociate a public IP address from a VM.

Prerequisites

An Azure account with an active subscription. Create an account for free.

Azure portal

Sign in to the Azure portal.
Browse to, or search for the virtual machine that you want to disassociate the public IP address from and then select it.
In the VM page, select Overview, and then select the public IP address.
In the public IP address page, select Overview, and then select Dissociate.
In Dissociate public IP address, select Yes.

Azure CLI

Install the Azure CLI, or use the Azure Cloud Shell. The Azure Cloud Shell is a free shell that you can run directly within the Azure portal. It has the Azure CLI preinstalled and configured to use with your account.

If using the CLI locally in Bash, sign in to Azure with az login.

A public IP address is associated to an IP configuration of a network interface attached to a VM. Use the az network nic-ip-config update command to dissociate a public IP address from an IP configuration.

The following example dissociates a public IP address named myVMPublicIP from an IP configuration named ipconfigmyVM of an existing network interface named myVMNic that is attached to a VM named myVM in a resource group named myResourceGroup.

az network nic ip-config update \
 --name ipconfigmyVM \
 --resource-group myResourceGroup \
 --nic-name myVMNic \
 --public-ip-address null

If you don't know the name of the network interface attached to your VM, use the az vm nic list command to view them. For example, the following command lists the names of the network interfaces attached to a VM named myVM in a resource group named myResourceGroup:
```
az vm nic list --vm-name myVM --resource-group myResourceGroup
```
The output includes one or more lines that are similar to the following example:
```
"id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/myResourceGroup/providers/Microsoft.Network/networkInterfaces/myVMNic",
```
In the previous example, myVMVic is the name of the network interface.

If you don't know the name of the IP configuration of a network interface, use the az network nic ip-config list command to retrieve them. For example, the following command lists the names of the IP configurations for a network interface named myVMNic in a resource group named myResourceGroup:

az network nic ip-config list --nic-name myVMNic --resource-group myResourceGroup --out table

The output is similar to the following example:

Name           Primary    PrivateIpAddress    PrivateIpAddressVersion    PrivateIpAllocationMethod    ProvisioningState    ResourceGroup
------------   ---------  ------------------  -------------------------  ---------------------------  -------------------  ---------------
ipconfigmyVM   True       10.0.0.4            IPv4                       Dynamic                      Succeeded            myResourceGroup

In the previous example, ipconfigmyVM is the name of the IP configuration.

If you don't know the name of the public IP address associated to an IP configuration, use the az network nic ip-config show command to retrieve them. For example, the following command lists the names of the public IP addresses for a network interface named myVMNic in a resource group named myResourceGroup:
```
az network nic ip-config show --name ipconfigmyVM --nic-name myVMNic --resource-group myResourceGroup --query publicIpAddress.id
```
The output includes one or more lines that are similar to the following example:
```
"id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/myResourceGroup/providers/Microsoft.Network/publicIPAddresses/myVMPublicIP",
```
In the previous example, myVMPublicIP is the name of the public IP address.

PowerShell

Install PowerShell, or use the Azure Cloud Shell. The Azure Cloud Shell is a free shell that you can run directly within the Azure portal. It has PowerShell preinstalled and configured to use with your account.

If using PowerShell locally, sign in to Azure with Connect-AzAccount.

A public IP address is associated to an IP configuration of a network interface attached to a VM. Use the Get-AzNetworkInterface command to get a network interface. Set the Public IP address value to null and then use the Set-AzNetworkInterface command to write the new IP configuration to the network interface.

The following example dissociates a public IP address named myVMPublicIP from a network interface named myVMNic that is attached to a VM named myVM. All resources are in a resource group named myResourceGroup.

$nic = Get-AzNetworkInterface -Name myVMNic -ResourceGroup myResourceGroup
$nic.IpConfigurations[0].PublicIpAddress = $null
Set-AzNetworkInterface -NetworkInterface $nic

If you don't know the name of the network interface attached to your VM, use the Get-AzVM command to view them. For example, the following command lists the names of the network interfaces attached to a VM named myVM in a resource group named myResourceGroup:
```
$vm = Get-AzVM -name myVM -ResourceGroupName myResourceGroup
$vm.NetworkProfile
```
The output includes one or more lines that are similar to the following example:
```
"id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/myResourceGroup/providers/Microsoft.Network/networkInterfaces/myVMNic",
```
In the previous example, myVMNic is the name of the network interface.
If you don't know the name of an IP configuration for a network interface, use the Get-AzNetworkInterface command to retrieve them. For example, the following command lists the names of the IP configurations for a network interface named myVMNic in a resource group named myResourceGroup:
```
$nic = Get-AzNetworkInterface -Name myVMNic -ResourceGroupName myResourceGroup
$nic.IPConfigurations.Id
```
The output includes one or more lines that are similar to the following example:
```
"id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/myResourceGroup/providers/Microsoft.Network/networkInterfaces/myVMNic/ipConfigurations/ipconfigmyVM"
```
In the previous example, ipconfigmyVM is the name of the IP configuration.
If you don't know the name of the public IP address associated to an IP configuration, use the Get-AzNetworkInterface command to retrieve them. For example, the following command lists the name of the public IP addresses for a network interface named myVMNic in a resource group named myResourceGroup:
```
$nic = Get-AzNetworkInterface -Name myVMNic -ResourceGroupName myResourceGroup
$nic.IPConfigurations.PublicIpAddress.Id
```
The output includes one or more lines that are similar to the following example:
```
"id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/myResourceGroup/providers/Microsoft.Network/publicIPAddresses/myPublicIP"
```
In the previous example, myVMPublicIP is the name of the public IP address.

Next steps

In this article, you learned how to dissociate a public IP address from a virtual machine.

Learn more about public IP addresses in Azure.
Learn how to associate a public IP address to a VM.
Learn how to configure IP addresses for an Azure network interface.