Dovecot not offering TLSv1.2 after a few minutes
14 Nov
2022
14 Nov
'22
6:14 p.m.
I have a very strange problem with one of our Dovecot servers (2.2.33.2) on Ubuntu 18.04.
The current configuration allows for TLSv1 to TLSv1.3 connections. I can verify those using testssl.sh, the tests will succeed (although correctly mentioning, that TLSv1 and TLSv1.1 should be disabled). Running the tests again after about 5 minutes, the results are different. TLSv1.2 now shows "not offered and downgraded to a weaker protocol".
Has anybody experienced a similar problem before?
Best regards Markus
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hi@zakaria.website
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Markus Wienhöfer