Keeping an eye on your site and sending you a notification when it goes down is one of the core features of Oh Dear. Under the hood, we'll send a request to your site and take a look if the response code is in the 200-299 range, which is the default response code range to indicate that everything is ok. Some of our users are monitoring password protected sites. In such cases, the web server might reply with status code 401 (unauthorised). Sure, extra headers can be specified on Oh Dear to hin...
