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After an update today, many SSL connections are silently blocked.


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Kaspersy Total Security
Windows 10.0.19045

At some point this morning [11 Aug 2023] kaspersky updated.

There was also a Windows update with the following:
Security update for MS windows KB5029244
Update for MS Windows KB5028951 

After this many of my every day programs stopped connecting:

  • dropbox = unable to log in. Updated the app, logged in but unable to sync
  • sourcetree -> bitbucket = SSL error - refused. Git bash worked/
  • thunderbird = unable to connect to any SMTP servers. Uninstalled and installed v115. This worked until i restarted and then none of the email accounts could connect.

Once i restarted and found then newly installed thunderbird would not longer connect, when it did before the resert, I paused kaspersky - and everything staarted working again,

I have no idea what has changed or where to start looking. I tried adding thunderbird.exe to exclusions, disabled the network settings -> mozilla firefox & thunderbird -> unchecked the scan secure traffic option - and nothing made any difference.

I tried adding thunderbird,exe in network settings -> trusted applications, but it crashed ono save.

Would be very grateful for any suggestions.

Thank you

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Hello @ice70

As well as above post.

Also if   you do not want  to update to Kaspersky Plus

Try this.

  1. In the main window of your Kaspersky application, click The settings icon in the lower-left corner of the window.
  2. Go to Security settings and click Network settings.
  3. Click Trusted addressesAdd
  4. Specify the website address that was displayed in the certificate warning message. Select the Active status and click Add.
  5. Click Save.
  6. Click SaveConfirm
  7. https://support.kaspersky.com/common/safemoney/12489#block8
  8. https://support.kaspersky.com/KWTS/6.1/en-US/186340.htm
  9. https://support.kaspersky.com/KWTS/6.1/en-US/186279.htm
  10. https://support.kaspersky.com/KWTS/6.1/en-US/186292.htm
  11. If none of the above helps follow Berny's update  to Kaspersky Plus.
  12. Thank you
  • Like 1
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