How to enable only TLS 1.3 and disable other versions?

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eraytufan
Posts: 8
Joined: Tue Sep 03, 2019 7:19 am

How to enable only TLS 1.3 and disable other versions?

Post by eraytufan » Mon Nov 30, 2020 10:27 am

Hi all,

I want to enable TLS 1.3 and disable all the other TLS versions. I have created a certificate and when I try the connection on the client, I can have a handshake using different TLS versions like TLS 1.2 or TLS 1.3. However I don't want client to have a handshake using TLS 1.2 or lower versions. So how can I disable all the other versions of TLS except TLS 1.3 or force the client to use TLS 1.3?

P.S. I tried updating openssl.cnf file, and added a property 'MinProtocol = TLSv1.3' but unfortunately it was not successful.

Thank you in advance.

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Andorhal
Posts: 106
Joined: Wed Nov 12, 2014 7:04 am

Re: How to enable only TLS 1.3 and disable other versions?

Post by Andorhal » Mon Dec 14, 2020 7:01 am

Hello.
TLS 1.3 is not yet supported in WinCC OA, we are looking into this for the next WinCC OA Version.
Best regards.

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