Monthly Archives: July 2011

You’ll remember that Uptime Robot is controlling the monitors from multiple locations to double-check and make sure that they are really down or up.

Although things work close to perfect, there are 2 downsides:

  • all the monitoring nodes are located in US datacenters which makes it possible to get false/positives if the “website being monitored” is not hosted in US and there is a communication problem between country/continent-wide networks (it sometimes happens).
  • Uptime Robot’s remote monitors run on shared accounts which can not check port monitors that require full system ownership.

In order to perfect the system, we started running 2 new remote monitoring servers: in Europe (Ireland) and Asia (Singapore) that are placed in Amazon’s Cloud.

So, with the new setup, every monitor will be controlled from 3 continents (North America, Europe and Asia) before it will be marked as down (including port monitors).

These new remote monitoring locations will be activated by 1 August 2011 to make sure that you whitelist the new IPs below if needed / a firewall is used (if you didn’t whitelist any IPs until now and things work ok, there is probably no need to take any actions):

  • 46.137.190.132
  • 122.248.234.23

P.S. And, we’ll be using these new nodes to check and report multi-continent response-times soon :).

Happy monitoring everyone!