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

[ice70]

Kaspersy Total Security 21.3.19.391
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

[Berny]

@ice70

Please upgrade to Kaspersky Plus :

Kaspersky: Basic, Standard, Plus, Premium - info & FAQ

 

[KarDip]

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 .
2. Go to Security settings and click Network settings.
3. Click Trusted addresses → Add. 
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 Save → Confirm
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