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According to the documentation the AuthTls is still using TLS 1.0. Is this so? Our version of the chilkat dll is runtime v4.0.30319. How can I be sure that I am using the latest TLS and SSL versions please?

Thanks, Justin

asked Jun 09 '17 at 05:27

justinF's gravatar image


Chilkat should typically use TLS 1.2.

The TLS handshake works like this: The TLS client sends it's "Hello" message to the server, and part of that Hello message tells the server what protocol versions it supports. Chilkat will say "I support TLS 1.0, 1.1, and 1.2". The server will then choose the version and say "OK, let's use TLS 1.2".

The decision about what protocol version and cipher suite to use is up to the server. The client just tells the server what it supports. Of course, there are features in Chilkat to say something like "Hello, I only support TLS 1.2"...


answered Jun 09 '17 at 08:25

chilkat's gravatar image

chilkat ♦♦

Thanks for the reply and explanation. Therefore AuthTls does not force TLS 1.0, correct? Clook are hosting an ftp service for us and they said they updated their service. Now with AuthTls enabled Connect fails, but works if AuthTls is set to false. Is this safe?

(Jun 09 '17 at 09:00) justinF
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Asked: Jun 09 '17 at 05:27

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Last updated: Jun 09 '17 at 09:00

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