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solkmaaker Senior Member
Joined: 28 June 2020
Online Status: Offline Posts: 163
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Posted: 16 September 2020 at 4:44am | IP Logged
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Apparently Outlook sync plugin does not support TLSv1.1 and up.
I tested with windows 10 (fully updated) and Outlook 2010.
Server was nginx, with RSA 4096 bit keys and diffie-hellman key was also 4096 bit, enabled protocols were TLSv1.1 TLSv1.2 TLSv1.3
Error message was: ERROR|Error occurred. The request was aborted: Could not create SSL/TLS secure channel.
If i enable TLSv1 on server side, sync work OK.
Although .NET version was 4.8, sync plugin SSL handshake behavior looks like .NET 4.5(.2), which supports TLSv1 at most according to
Transport Layer Security (TLS) best practices with the .NET Framework
Can sync plugin be upgraded to use .NET version 4.6 which supports TLS 1.1 and 1.2?
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Alex AfterLogic Support
Joined: 19 November 2003
Online Status: Offline Posts: 2206
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Posted: 16 September 2020 at 5:01am | IP Logged
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Hi,
What is the URL of the installation with TLS 1.0 turned off? So that we'd be able to check.
Thanks!
Regards,
Alex
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solkmaaker Senior Member
Joined: 28 June 2020
Online Status: Offline Posts: 163
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Posted: 16 September 2020 at 5:16am | IP Logged
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Hi
Try: https://XXX.XXX.XX
This is just testing server at the moment, let me know if you need any changes.
Edit: removed URL, since it is public forum
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solkmaaker Senior Member
Joined: 28 June 2020
Online Status: Offline Posts: 163
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Posted: 16 September 2020 at 7:28am | IP Logged
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I see some requests coming in from your side with TLS 1.2:
Code:
Sep 16 13:55:22 localhost mail nginx: XX.XXX.102.70 - test1@XXXX.XXX [16/Sep/2020:13:55:22 +0000] TLSv1.2/ECDHE-RSA-AES256-GCM-SHA384 "OPTIONS / HTTP/1.1" 401 1019 "-" "-"
Sep 16 13:55:32 localhost mail nginx: XX.XXX.102.70 - - [16/Sep/2020:13:55:32 +0000] TLSv1.2/ECDHE-RSA-AES256-GCM-SHA384 "POST /?/Api/ HTTP/1.1" 401 1115 "-" "-"
Sep 16 13:55:35 localhost mail nginx: XX.XXX.102.70 - test1@XXXX.XXX [16/Sep/2020:13:55:35 +0000] TLSv1.2/ECDHE-RSA-AES256-GCM-SHA384 "OPTIONS / HTTP/1.1" 401 1019 "-" "-"
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When my win10 did requests, there was nothing in logs, until i enabled TLSv1
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Alex AfterLogic Support
Joined: 19 November 2003
Online Status: Offline Posts: 2206
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Posted: 16 September 2020 at 7:39am | IP Logged
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Hi,
Thanks. OutlookSync tool has been updated to support TLS 1.2 as well.
Regards,
Alex
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solkmaaker Senior Member
Joined: 28 June 2020
Online Status: Offline Posts: 163
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Posted: 16 September 2020 at 8:18am | IP Logged
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Hi
Tested, works with TLS1.2 now.
Thank you.
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