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TLS errors
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complex1 Offline
3CX Adv. Cert. Engineer
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Posts: 1,529
Joined: Jan 2014
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Post: #2
RE: TLS errors
(11-05-2020 09:07 PM)jverbarg Wrote:  Hey, I just got a new batch of T46S phones, a couple will not register over TLS.

Each phone is configured the same, is on the same firmware version: 66.85.0.5
Has the same hardware version: 66.0.0.128.0.0.0
Has a factory installed device certificate

When I do a capture, they all start negotiating over TLS 1.2, same cipher suite selected (0xc014), but on a couple of the devices, after that initial negotiation, the phone initiates a downgrade to TLS 1.0, which my server then rejects.

How do I stop this? Thanks

Hi,

Please add next to your provisioning file.

Code:
##It configures the TLS version the IP phone uses to authenticate with the server.
static.security.default_ssl_method = 5

Hope this will help.

Kind regards,
Frank.

I am not an employee of Yealink.
Dutch is my native language, not English. Apologies for my imperfect grammar.
Please do not send unsolicited PM messages. I will not answer them.
11-05-2020 09:26 PM
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Messages In This Thread
TLS errors - jverbarg - 11-05-2020, 09:07 PM
RE: TLS errors - complex1 - 11-05-2020 09:26 PM
RE: TLS errors - jverbarg - 11-10-2020, 08:36 PM
RE: TLS errors - complex1 - 11-10-2020, 09:18 PM

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