What does this error message means? How to solve the issue?
Error caused by lookup value 'No Secure Protocol Available' in the channel 'Security rating'
Modified on 2025-06-10 16:33:33 +0200
Disclaimer:
The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.
The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.
Based on the description provided I can see the sensor you are using uses lookups to determine the status values of one or more channels.
When the sensor tries to connect, it uses the most secure connection protocol available. If no connection is possible, the next best protocol is used. The error message shows that none of the supported protocols (via TLS, SSL) were accepted by the device.
This issue could be caused by the firewall configuration, the wrong ports used, or possibly flood protection.
In order to fix this, ports must be open and the firewall must allow PRTG to access them. If you don't need these ports monitored, you can delete or pause the sensors in question.
Sep, 2023 - Permalink