3/10/2023 0 Comments Azure bastionCreating ways to avoid modifications to your Azure Network Security Group (NSG) or running a dedicated VPN exist. Finding solutions to avoid making additional network firewall rules for server management can be clumsy. Sometimes when troubleshooting a problem, it helps to have administrative access directly to the server. Azure Bastion is a connectivity platform for your Virtual Machines in your Azure VNET.Ī Bastion is deployed in your required VNETĪn admin can connect to the Azure Portal and then choose to connect via Bastion to a VM with a click over either SSH or RDP.Lately, I have been spending a lot of time working with Azure Virtual Machines (VMs) debugging some ways to deploy applications. We can browse to our Bastion in the Azure Portal and see our active session. The only other thing we need to allocate is a Public IP, so we will do this as part of the ARM template in the GUI.Īpart from maybe changing the Resource Group or hooking up to a premade Public IP object, thats pretty much it for the creation of the Bastion PaaS Service.Īfter a few minutes, our Bastion has been provisioned and we can connect to our VM.Įnter the Username and Password of your VM and click ‘Connect’Īnd there we have it, we are connected via the Bowser/Bastion to our VM! Azure Bastion requires a minimum of a /27 bit range, so because I have a large CIDR Block allocated I’m just going to keep this straight forward and use an entire /24 range of 172.16.200.0/24, basically so we know that anything with an address of 172.16.200.X will be something to do with Bastion! Here I have created our AzureBastionSubnet quite high in my VNET range as you will find there are many things that require specific subnets as you work through the Networking features of Azure. Now, as a prerequisite, Azure Bastion is expecting to find a Subnet named ‘AzureBastionSubnet’, so we can quickly set this up by clicking on the link ‘Manage Subnet Configuration’ We are presented with a screen to configure Bastion. Remember that this VM does NOT have a public IP, so is not contactable to anything outside of the Azure VNET that it is currently located. So, I’m going to view the VM in the Azure Portal and select ‘Connect’, then select ‘Bastion’. For our purposes here, I will walk through a quick way to set up a Bastion in your subscription. We can use a variety of ways to configure Bastion, PowerShell, CLI, Portal etc. I have a Basic Virtual Machine in my Subscription called ‘VM01’ It is connected to my Jonnychipz-VNET in the ‘Servers’ Subnet, so will have a private IP of 172.16.1.0/24. All of these techniques are highly frowned up on by any security teams and quite frankly, you would NEVER do in a production environment, so using Azure Bastion offers secure access to your Azure hosted VM’s via a Browser!Īs alluded above, Azure Bastion offers a Secure way to access your resources in Azure at the same time as keeping your Security team smiling and happy!įirstly, lets set the scope. If you are an IT Pro or in some form of admin function, you will know what a ‘Jump Box’ is, and Azure Bastion in layman’s terms is an answer to this concept.īastion is a secure PaaS offering in Azure that you can create and configure to offer TLS connections to your servers (RDP or SSH) without the need to provision a specific server with published access via a firewall, without the need to provide a public IP directly onto your internal servers etc. So Bastion went GA quite a few months ago now and I did have a little play with it then, but thought this would make a nice little article. In keeping with my #AzureNetworking series, Azure Bastion seems like a nice place to move to next!
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