Azure Keep Alive Url vs Local Keep Alive Url

Questions
1

We are getting lot of 404 errors in Azure Application Insights with URL https://my-umbraco-cms.azurewebsites.net/umbraco/api/keepalive/ping

Interestingly when I run the application in local it works as expected
https://localhost:44335/umbraco/api/keepalive/ping

If it does not work in Azure should we disable it using,

<keepAlive disableKeepAliveTask="true" keepAlivePingUrl="{umbracoApplicationUrl}/api/keepalive/ping" />

As far as I understand it has,

public class OnlyLocalRequestsAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(HttpActionContext actionContext)
    {
        if (!actionContext.Request.IsLocal())
        {
            throw new HttpResponseException(HttpStatusCode.NotFound);
        }
    }
}

So only localhost works but we can’t put localhost in Azure case.

This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/108658-azure-keep-alive-url-vs-local-keep-alive-url