![]() You can now access your VMs via Azure Bastion.įor this example I created a virtual machine with Windows on Azure. If you landed here, you have successfully implemented Azure Bastion and configured the Network Security Groups accordingly - congratulations. Open the ports only for the sources Azure Bastion and other private networks if necessary! Your configuration should look like the following scheme. On the second NSG between Azure Bastion and the VMs you have to open port 3389 (RDP) and port 22 (SSH), depending on what you are working with. a VPN and LAN), but I will not do this in this example. You can restrict the source to specific networks (e.g. My recommendation is that you only open port 443 at NSG before Azure Bastion. Another NSG should be placed between the Azure Bastion and the VMs, which should already exist, unless it is a completely new network. You should place one in front of the Azure Bastion and attach it to the "AzureBastionSubnet". My recommendation is that you have at least two NSGs. But the work is not done yet, because most likely you want to make network restrictions via Network Security Group (NSG). After a short moment Azure Bastion is then basically implemented and functional. Once you have selected the resource group, region, network and public IP, you can continue, as there are no further configurations to choose during creation. But since you don't really have a choice there, I assume that this unnecessary step will be removed in the course of time, or that in the future the naming of the subnet will be irrelevant and the information will therefore be requested (improvisation of the author). It is important that you have considered this in the planning according to the previous chapter.Īlthough the subnet has to be called exactly "AzureBastionSubnet", you will be asked to select the subnet after selecting the network. You can also create the necessary subnet directly in the wizard, as the following printscreen shows. If your network is not yet prepared, it is not tragic. ![]() Ideally you have prepared your network before implementation. See the red message in the following printscreen. When choosing the network, note that it must contain a subnet named "AzureBastionSubnet" to place the Azure Bastion there. Just search the Azure marketplace for "Bastion".įill out the form and select the desired resource group, region, etc. It is as simple as possible and takes hardly any time. If you have done the planning conscientiously, you can start the implementation with a clear conscience. You will learn more about this later.įollowing two examples, an unsupported (right - "Hub & Spoke" network architecture) and a Bastion Best Practice scenario (left). Between Azure Bastion and VM, RDP (3389) and SSH (22) must be guaranteed. On Azure Bastion you only need to release port 443. Create a concept for the "Network Security Group" permissions.Make sure that you choose an appropriate name that also fits into your chosen naming convention.However, for "normal use" Microsoft announces in the FAQs that the practical limit for RDP is 25 concurrent sessions and SSH is 50 concurrent sessions. Azure Bastion has theoretically no limitation on concurrent use, since RDP and SSH are both usage-based protocols.The subnet must be specifically named "AzureBastionSubnet", similar to the Azure VPN Gateway. According to best practice, no other service should be placed in this subnet. An Azure Bastion must be placed in a separate subnet.However, Microsoft is working to remove this limitation. So if you have one, you have to implement one Azure Bastion per network, if you want to access the VMs via the service. At the time of writing this article, the "Hub & Spoke" network architecture is not yet supported.You can then access all VMs on the same network (no matter what subnet they are on), as long as you don't block it via the Network Security Group (NSG). Azure Bastion only needs to be created once per network. ![]() The following points should be taken into account when planning. Accordingly, I would like to start with the preparation and planning. ![]() The most important thing, as so often, is to plan the use and implementation well. Planning and preparation for Azure BastionĬreating Azure Bastion is very easy. In this article I will not focus on the service itself, but rather on the steps necessary to plan and implement Azure Bastion. This allows you to enable your system administrators and system specialists to "work anywhere" without any security concerns. Azure Bastion is an Azure service that allows you to access your Azure VMs securely and centrally via the web portal.
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