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doc: clarify tls version negotiation behavior with DEFAULT_MIN_VERSION #60571

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doc: clarify tls version negotiation behavior with DEFAULT_MIN_VERSION #60571

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7 changes: 7 additions & 0 deletions doc/api/tls.md
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Expand Up @@ -496,6 +496,13 @@ createServer({ ciphers: 'DEFAULT@SECLEVEL=0', minVersion: 'TLSv1' }, function(so
This approach sets the security level to 0, allowing the use of legacy features while still
leveraging the default OpenSSL ciphers.

**Note:**
The default minimum TLS version (`tls.DEFAULT_MIN_VERSION`) is `'TLSv1.2'`.
If you set `maxVersion` lower than this value (for example, `'TLSv1'`), no protocols will overlap, and the TLS handshake will fail with:
`ERR_SSL_NO_PROTOCOLS_AVAILABLE`.
Even when `maxVersion` equals the default, weaker ciphers or low security levels may cause `ERR_SSL_SSLV3_ALERT_HANDSHAKE_FAILURE`.


### Using [`--tls-cipher-list`][]

You can also set the security level and ciphers from the command line using the
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