When you create/edit a monitor, you can select on which checkpoint locations that monitor will run. Many Uptrends users choose to select as many checkpoints as possible (you can select multiple countries or even continents if you want), but sometimes it’s useful to have a checkpoint selection that’s carefully targeted at a specific region. For each subsequent check, we’ll choose one of the checkpoint locations you selected.
Checkpoint locations may be out of service for short periods of time, due to local network problems or maintenance. We try to minimize checkpoint downtime, but it is possible that several checkpoints are unavailable at the same time. This means that there may be no checkpoints available if you’ve only selected a few checkpoints. To ensure continuity for your monitoring, the monitor will still be executed, on a fallback location outside your normal checkpoint selection.
However, this may cause a problem if you are using a whitelisting policy that has whitelisted only specific IP addresses of our checkpoints .
To resolve this issue, you can do two things:
- 1. Increase the number of checkpoints you are using for your monitoring. This will greatly reduce the chance that your entire checkpoint selection is unavailable for monitoring.
- 2. Turn off the fallback behavior: in Account Settings, we’ve added a new option Checkpoint fallback, which is enabled by default. If you turn the option off, no fallback will occur. Instead, the monitor check will be skipped. A new monitor check will be attempted at the next monitor interval. Please note that this may cause some gaps in your monitoring results.