-Z tlsMinProtocolVersion

This option specifies the minimal TLS version to be used by the TELNET server. It replaces in future together with the option -Z tlsMaxProtocolVersion the old option -Z Protocol. Until then the three options work together, i.e. only TLS protocol versions are supported, which conform to all three options.

Because TLS versions older than TLS 1.2 are declared as "deprecated" by the IETF, TELNET now supports only version 1.2 or newer of the TLS protocol.

-Z tlsMinProtocolVersion

={ TLSv1.2 | TLSv1.3 }

TLSv1.2

TLS protocol version 1.2

TLSv1.3

TLS protocol version 1.3