Website reports error 403 in 360 Monitoring with a firewall configured: Operation timed out

Updated March 21, 2024 11:47

Plesk 360 Platform 360

Symptoms

Website frequently reports error 403 in 360 Monitoring or the below one:

CONFIG_TEXT: [28] Timeout was reached (Operation timed out after 30000 milliseconds with 0 bytes received)
The website is up and accessible.

Restrictions of a firewall.

Adjust the configuration of a firewall that is used on a server to pass requests from the necessary 360 Monitoring IP addresses:
https://monitoring.platform360.io/whitelist.php

Note: if there is the Plesk Firewall check this article for adjustments.