This week, Support Lead, Helen Grimbly will be outlining how Sitemorse Global Heartbeat monitoring works.

Sitemorse Global Heartbeat helps an organisation to monitor the uptime and response time of a web page, often the front page of a site. If there are any issues with the site being down or responding slowly then specified users can be alerted via email and/or SMS.

There are currently 9 independent Sitemorse Global Heartbeat monitors (based around the world) and each carry out one fetch of the HTML of the monitored page of the site every 5 minutes. So there's a total of 9 fetches every 5 minutes. A check includes the status code returned (e.g. 200 is OK status) and the download time for the HTML only. 

The Sitemorse Global Heartbeat monitor IP addresses are listed at the following URL: https://secure.sitemorse.com/global-heartbeat-ips.txt 

The list may change at any time (although will not change frequently) but this file is always up-to-date.

This is also available as a video on YouTube.