Getting sporadic responses from support, and am looking for help from the community because we are now reaching critical service interruption.
We have complex alerting and scheduling set up in OpsGenie which rely on our PRTG API integrations. Over 40hrs ago, in the middle of the night, calls from our PRTG server stopped generating alerts. We also could find no trace of a failed API call from our OpsGenie logs.
During troubleshooting, we noted the odd integration requests would be received, but now with completely blank header parameters.
When inspecting the API call from our PRTG server, I see the following error: HTTP/1.1 426 Upgrade Required (Sensor/Source/ID: 2321/3483/1)
Nothing has changed on our systems. We refreshed the API, checked our configuration settings, recreated the integration on both sides, confirmed the service is using tls 1.2. Patched and rebooted our server.