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I use .net core 5 and SignalR to send some data to UI (angular 10). In any client that has Kaspersky installed, I get an error message:

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This is negotiate message:

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and this is response:

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I searched in Kaspersky blogs and found that this error shows that Antivirus blocked the handshake process. If I uninstall Kaspersky, everything will be fine but I have to keep Antivirus.

Hojat Afsharan
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  • Did you try open link in browser? What message you have in the browser? Do you use https connection? Maybe communication is blocked because is unencrypted? I'm only guessing. – Lukasz Szczygielek Jan 18 '21 at 13:10
  • I have no message in browser. I use https. I will check encryption. What if all of these conditions are met ans still have error? I am thinking of removing signalR and managing all cyclic events on UI side. – Hojat Afsharan Jan 18 '21 at 15:19

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