Bug #104702 Upgrade to .26 "The client and server cannot communicate, because they do...
Submitted: 23 Aug 2021 18:00 Modified: 24 Aug 2021 12:15
Reporter: Robert Bilderbach Email Updates:
Status: Can't repeat Impact on me:
None 
Category:Connector / NET Severity:S3 (Non-critical)
Version:8.0.26 OS:Windows (10-21H1)
Assigned to: CPU Architecture:x86 (Intel(R) Core(TM) i7-8705G)
Tags: .net, 8.0.26, Visual Studio

[23 Aug 2021 18:00] Robert Bilderbach 
Description:
Updated from MySql.Data 8.0.25 to .26 
https://www.nuget.org/packages/MySql.Data/8.0.26

Now we get the error:
"The client and server cannot communicate, because they do not posess a common algorithm"

program has been running for years.

Only think we do that i dont always see is disabling the lower versions of TLS using IISCrypto:
https://blog.nartac.com/2013/04/19/iis-crypto-explained/
we only leave 1.2 enabled.
but pervious version handles it fine!

Here is a screenshot of our server config:
https://1drv.ms/u/s!AoYhAbeouWGGhtdf0M0RS5xSP2GT5A?e=1iQ4r3

How to repeat:
update package to .26
Try to connect to server
receive error

roll back to .25
try to connect to server
success

Suggested fix:
Rolled back to previous release and it works fine.
[24 Aug 2021 12:15] MySQL Verification Team 
Hello Robert Bilderbach,

Thank you for the bug report.
I tried to reproduce your issue on windows 10 and updated the package from 8.0.25 to 8.0.26 and tried to connect to server but I am not seeing any issues at my end. 

Regards,
Ashwini Patil