Step-by-Step guide to Azure Bastion IP-Based Connection

Step-by-Step guide to Azure Bastion IP-Based Connection

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Last Updated on June 8, 2022 by Dishan M. Francis

Azure Bastion is a PaaS service that provides seamless RDP/SSH connectivity to virtual machines via Azure portal. When we use Azure Bastion, virtual machines do not require public IP address to connect even if the VM is in a different VNET (same or different subscription). As long as Azure Bastion subnet can reach the remote network (via VNET peering, VPN), we can use the Azure Bastion service to connect. Azure Bastion now supports IP-Based connectivity to on-premises, Azure, and non-azure virtual machines. It means as long as Azure bastion can reach remote networks via Express route, Site-to-Site VPN, or Peering, we can initiate IP-based RDP/SSH connection to virtual machines. Normally when we need to connect to VM via Azure bastion, we use the VM page to connect but with this new feature, we will use Azure bastion itself to initiate the connectivity. That will provides a seamless RDP/SSH access experience to Azure and Non-Azure virtual machines.

In this blog post, I am going to demonstrate how we can enable IP-based connection on the existing Azure bastion.

Prerequisites

Before we move forward with the configuration make sure you have the following,

Azure Bastion Deployed – You need to have already deployed the bastion with the relevant connectivity. Ideally, it should follow hub-spoke network topology and install Azure bastion in the hub network. All other networks will connect to the hub network. If you are using an express route or site-to-site VPN, those networks also should be reachable from the hub network. For this demo, I am using the following setup.

hub-spoke azure network topology

Here I have created three resource groups in three different Azure regions. Each resource group will have its own Azure virtual network. For the connectivity, we will be using the hub-spoke network topology. EUSVnet1 & UKSVnet1 are Spoke virtual networks and BASVnet1 is the Hub virtual network. Both Spoke virtual networks will have Global VNet peering with Hub virtual network. I have deployed the Azure Bastion service on the hub virtual network (BASVnet1). A step-by-Step guide to set up this environment is available on https://www.rebeladmin.com/2020/11/step-by-step-guide-how-to-use-azure-bastion-with-global-vnet-peering/

Virtual machines in the remote network for testing

Configuration

To enable the IP-based connectivity,

1) Go to Azure portal

2) Then search for Bastions

3) From the list, click on the relevant Azure Bastion deployment.

existing Azure bastion deployment

4) Then click on Configuration

Azure bastion configuration

5) Under the Tier, make sure it is using Standard SKU. This feature required a standard SKU. If it’s set to Basic SKU, click on the drop-down and select Standard.

Azure bastion SKU

6) Then from the feature list select IP-based connection.

Azure Bastion IP-Based Connection feature

7) Then to apply changes click on Apply

Apply Azure Bastion configuration changes

8) Once the changes are applied, we can see a new connect setting on the Bastion page.

Azure Bastion IP-Based Connection page

Testing

To test the connectivity, first I have chosen a VM running on EUSVnet1 (East US) which has IP 10.15.0.4. To proceed,

1) Click on Connect on Azure Bastion page.
2) Then fill in the relevant info such as IP address, port, username, and password.

Azure Bastion IP-Based Connection Settings

3) In the end, click Connect to initiate the connection.

Initiate IP-Based connection

4) As expected I was able to connect to the VM (10.15.0.4) using an IP-based connection.

successful IP based connection to Azure VM

5) I also test with VM running on UKSVnet1 (UK South) which has IP address 10.75.0.4 and I was able to connect without an issue.

Azure Bastion IP-Based Connection to another VM

another successful Azure Bastion IP-Based Connection

As we can see above, the IP-based connection with Azure Bastion is working as expected. If you have any further questions about this, feel free to contact me at rebeladm@live.com. Also, follow me on Twitter @rebeladm to get updates about new blog posts.

The post Step-by-Step guide to Azure Bastion IP-Based Connection appeared first on Technical Blog | REBELADMIN.

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June 8, 2022 at 10:19PM
Dishan M. Francis