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How to resolve SSL Unsupported Protocol Error on Opsview Agent

If you use an old Opsview Agent, the error message below is frequently encountered.

Output: UNKNOWN: SSL Error raised in Agent Client ([SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1129))
Error: [SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1129)

The resolution is to install the latest version of the Opsview Agent. However, if this is not an option to clear the error message, please refer to the instructions below:

Steps to make the protocol supported on the old Opsview Agent Copied

• Create a new variable called NRPE_PROTOCOL.
• Set the default value to be “!SSLv2:!SSLv3”. This means that it only allows TLSv1. The exclamation point represents as “not”.
• Add the argument %NRPE PROTOCOL% at the start of the arguments list in the COMMAND field of all the checks with check_nrpe.
• Perform Apply Changes to apply the changes recently made.