[Feature Request] OpenVPN Instances - TLS Version Minimum

[ky41083]

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• [X] I have read the contributing guide lines at https://github.com/opnsense/core/blob/master/CONTRIBUTING.md
• [X] I am convinced that my issue is new after having checked both open and closed issues at https://github.com/opnsense/core/issues?q=is%3Aissue

Is your feature request related to a problem? Please describe.

Meet compliancy policy requirements & prevent TLS downgrade attacks.

Describe the solution you like

A drop down option w/ 1.2, 1.3, and Highest as options for both servers and clients. This would achieve something similar to the following:

# Use 1.2
tls-version-min 1.2
# Use 1.3
tls-version-min 1.3
# Use Highest Supported
tls-version-min 0.0 or-highest

Describe alternatives you considered

There are no alternatives for this.