Use Azure Alerts to monitor S2S VPN connection status

It’s all well and good having set yourself up a S2S VPN to link your Azure and On-Prem resources, but how do we monitor and alert for any outages on our VPN connection.

Surely there has to be a better way than logging into the Azure portal every time and checking the status?

Luckily we can easily setup an alert in Azure to notify us of any issues with our VPN connection.

Creating our alert

Log into our Azure Portal and navigate to our Virtual Network Gateway and find the Monitoring section on the left menu. Choose the option for Alerts

From the top menu choose Create and then Alert rule

From the Select a Signal screen choose Gateway S2S Bandwidth

Scroll down to the Alert Logic and set the Operator to Less than or equal to, the Aggregation type to Normal and the Threshold value to 0. Tweak your Aggregation granularity and Frequency of evaluation as you see fit depending on how quickly you need to be alerted

Once you see your Condition as below you can choose Next: Actions

Under the Actions screen, you’ll need to choose Create Alert Group so that our Alert actually does something

Choose your Subscription and Resource Group and give your Alert Group a name, select Next to choose your Notification Type

Change Notification type to Email Azure Resource Manager Role

Change Azure Resource Manager Role to whichever role you see fit, and select Yes for Enable the common alert schema then click OK

Give a name to your Notification type and select Next: Actions

We can set Action types that will run when our alert is triggered from the below options but in our case we’re going to skip this step, lets continue on to the review screen

Lets hit the button to test our new alert and choose Metric alert – Static threshold and click Test

You should receive an email similar to the below

Now that we know that our alert works we can return to our Azure Portal and click Create to finalise the creation of our alert

Click Next: Details to take us to our details page for our alert. Choose your Severity level as appropriate and give your alert a name, leave the box ticked to Enable upon creation and decide whether you want alerts to be automatically resolved

Continue to the review screen and click Create.

We now have an alert setup that will email us when our S2S VPN drops it’s connection.

How does our alert look when it is triggered for real?

Your alerts come from the Microsoft email azure-noreply@microsoft.com

When an alert is triggered you’ll receive an initial email with a ton of information about the resource and metrics that triggered the alert that looks like the below

At the point when your resource is working again and the alert is resolved you’ll receive an email from the same address that looks like this

Now that you know how to configure and enable your alerts you can setup alerts for your other Azure resources!

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