Ways to Connect On-Premises Servers to Azure for Monitoring

January 21, 2026 • By KPThink

Image made with AI for visual purposes only.

In today's rapidly evolving IT landscape, many businesses find themselves managing a hybrid environment, with both on-premises servers and cloud services playing vital roles. Monitoring these on-premises servers is critical for preserving performance, security, and reliability.

But how do you effectively monitor on-premises servers, especially when they coexist with cloud services like Azure? The answer lies in connecting your on-premises servers to Azure for centralised monitoring.

Why Connect On-Premises Servers to Azure?

Azure offers a thorough suite of monitoring tools that can provide real-time insights into your on-premises servers. By using Azure's cloud-based monitoring capabilities, you can reduce the need for costly, on-site monitoring solutions, gain a unified view of your entire IT infrastructure, and proactively manage performance and security issues.

Plus, Azure's scalability ensures that your monitoring setup can grow with your business needs.

Prerequisites for Connecting On-Premises Servers to Azure

1. Azure Account Setup

Firstly, ensure you have an active Azure account. If you don’t already have one? You can sign up for an account at the official website: https://azure.microsoft.com/en-us/free/. Make sure your subscription includes the necessary services, such as Azure Monitor or Azure Arc.

2. Network Configuration

Your on-prem network must be able to reach Azure endpoints. This typically involves opening outbound HTTPS (port 443) on your firewall, or setting up an Azure VPN Gateway or ExpressRoute circuit for private connectivity. Confirm the specific IP ranges in the Azure IP Ranges and Service Tags document for your target region.

Methods To Connect On-Premise Servers to Azure

1. Using Azure Arc

Azure Arc lets you manage and monitor on-premises servers from the Azure portal as if they were native Azure resources, without moving them to the cloud.

Step 1: Download the Azure Connected Machine agent from the Azure portal and install it on each on-premises server (Windows or Linux). The agent connects outbound to Azure over HTTPS.

Step 2: Register each server by running the onboarding script provided in the Azure portal under Azure Arc → Servers. Once registered, the server appears in your Azure resource list and you can apply Azure Policy, enable Defender for Cloud, and collect logs via Azure Monitor Agent.

2. Using Azure Monitor

Azure Monitor provides insights into server performance, availability, and usage, making it an excellent choice for businesses looking to keep a close eye on their infrastructure

Step 1: Install the Azure Monitor Agent (AMA) on each on-premises server. If the server is already registered in Azure Arc, deploy the AMA extension directly from the Azure portal. For non-Arc servers, install the agent manually and configure it to point to your Log Analytics workspace.

Step 2: Create Data Collection Rules (DCRs) in Azure Monitor to specify which metrics and logs to collect. Then build alert rules and dashboards in Azure Monitor Workbooks for a real-time view of server health, CPU, memory, disk, and network across your entire estate.

3. Using VPN or ExpressRoute

For environments with strict data residency or compliance requirements, traffic to Azure Monitor should travel over a private connection rather than the public internet. Azure VPN Gateway creates an encrypted IPsec tunnel; ExpressRoute provides a dedicated private circuit through a connectivity provider with predictable latency and no public internet exposure.

Step 1: Set up an Azure VPN Gateway or provision an ExpressRoute circuit in your Azure subscription. Configure the on-premises VPN device or router to connect to Azure's gateway. Once the private link is established, Azure Monitor agents on your on-premises servers route telemetry through the private connection rather than public HTTPS.

Best Practices for Monitoring with Azure

Implementing Security Measures

Ensure all tools' data is encrypted using secure authentication methods, regularly update agents to protect against vulnerabilities

Regularly review log metrics to consistently identify trends and potential incidents.

Automate Alerts and Notifications

Set up automated alerts and notifications for critical metrics to respond quickly if something goes wrong.

Not sure where your cloud setup stands?

Get a free cloud readiness assessment

Conclusion

Connecting on-premises servers to Azure Monitor gives you a single pane of glass across your hybrid estate, without lifting those workloads to the cloud. Azure Arc is the simplest path for most environments. Azure Monitor with AMA handles the telemetry collection. And a VPN or ExpressRoute connection handles the security requirement when public internet routing isn't acceptable. The right combination depends on your compliance requirements, network topology, and whether you're already using Azure Arc for other management tasks.