AZ-104 Microsoft Azure Administrator Exam

Configure Azure Bastion Deployment

Azure Bastion is a security-focused service designed to enable secure remote connectivity to Azure virtual machines (VMs). Unlike traditional methods that expose VMs to public IP addresses, Azure Bastion allows administrators to perform RDP (Remote Desktop Protocol) and SSH (Secure Shell) connections without compromising security. This is particularly valuable for IT professionals who need secure access to manage VMs within the Azure environment.

Deployment and Configuration

Deploying Azure Bastion involves creating it within an existing virtual network. Essential steps include configuring a dedicated subnet named AzureBastionSubnet, which must be at least /26 in size. This subnet is critical as it houses the Bastion host while ensuring sufficient room for system operations. Deployment can be accomplished through the Azure portal, PowerShell, or the Azure CLI, providing flexibility based on user preference.

The procedure includes:

• Creating a virtual network with the appropriate address space and subnet allocations.
• Setting up the AzureBastionSubnet, an exclusive network segment for Bastion activities.
• Creating a public IP address specifically for the host, facilitating RDP/SSH traffic over port 443.
• Deploying the Bastion host using preferred methods like the portal, PowerShell, or the CLI.

Secure Connectivity

Azure Bastion enhances security by utilizing private IP addresses for connecting to VMs, removing the necessity of public IPs and simplifying overall security practices. This direct portal-based connection ensures a smooth, secure experience, eliminating reliance on client software or additional configurations on each VM. Administrators can access virtual machines securely without exposing sensitive data to potential online threats.

Network Security Groups (NSGs)

Proper configuration of Network Security Groups (NSGs) is indispensable when deploying Azure Bastion. NSGs must be set up to allow:

• Ingress traffic from the public internet on port 443, alongside traffic from Azure Bastion’s control and data planes.
• Egress traffic targeting VMs on ports 3389 (RDP) and 22 (SSH), as well as other requisite Azure services.

These settings ensure that both incoming and outgoing connections are monitored and controlled effectively, maintaining security integrity within the network infrastructure.

Best Practices

Adherence to best practices is vital for maximizing the benefits of Azure Bastion:

• Delete unused resources promptly to avoid incurring unnecessary charges; this includes removing the Bastion host when it’s no longer needed.
• Monitor and manage configurations regularly to confirm they align with evolving security policies.
• Select appropriate SKUs considering features like host scaling capabilities and custom port configurations that match specific requirements.

Implementing these best practices ensures effective deployment and operation of Azure Bastion, enhancing secure access to Azure virtual machines.

Conclusion

Configuring Azure Bastion Deployment centers on connecting securely to VMs without exposing them to public vulnerabilities. It involves setting up critical network components such as subnets and NSGs while adhering to best practices for resource management. This approach not only heightens security but also simplifies remote management, providing assurance against common cybersecurity risks associated with VM connectivity. These concepts are crucial for students aiming to clear the AZ-104 exam, reinforcing their knowledge about optimizing virtual network security within Azure.