Application Insights and .Net Core - 0.0.0.0 IP

Question

All my requests logged on application insights have the 0.0.0.0 IP. Why?

Details:
- Running a app on azure app service
- Using .Net Core 2
- Other info seems ok, like, some requests from around the globe and etc

Answer 1

The IP masking feature of Application Insights can be disabled.

Know your compliance requirements first before you do so!

There are two ways to do so:

First, make a REST call to reconfigure your existing App Insights instance

I suggest leveraging Azure CLI for that task, as you don't have to take care of the access token. Replace the missing values accordingly

• <sub-id>
• <rg-name>
• <resource location>

az rest --method patch \
        --url https://management.azure.com/subscriptions/<sub-id>/resourceGroups/<rg-name>/providers/microsoft.insights/components/<resource-name>?api-version=2018-05-01-preview \
        --body { \"location\": \"<resource location>\", \"kind\": \"web\", \"properties\": { \"Application_Type\": \"web\", \"DisableIpMasking\": true } }

Second, use a custom TelemetryInitializer

public class CloneIpAddress : ITelemetryInitializer
{
    public void Initialize(ITelemetry telemetry)
    {
        if (telemetry is ISupportProperties propTelemetry && !propTelemetry.Properties.ContainsKey("client-ip"))
        {
            var clientIPValue = telemetry.Context.Location.Ip;
            propTelemetry.Properties.Add("client-ip", clientIPValue);
        }
    }
}

And than don't forget to register the type with the DI container

services.AddSingleton<ITelemetryInitializer, CloneIpAddress>();

The IP address will show up as a custom dimension