Unable to view site This site can’t provide a secure connection, *** uses an unsupported protocol

Brave Browser Desktop Support
1

Recently I have not been able to access the official web mail of the company.

This site can’t provide a secure connection

**********.rs uses an unsupported protocol.
ERR_SSL_VERSION_OR_CIPHER_MISMATCH
Unsupported protocol
The client and server don’t support a common SSL protocol version or cipher suite.

I took Shields down, it didn’t help.

Until a few days ago, everything worked, now it doesn’t.

I cannot influence the security configuration of that website and its security protocols.

How do I overcome this problem?

Version 1.35.100 Chromium: 98.0.4758.87 (Official Build) (64-bit)
Windows 10 Pro

Google Chrome has no problem accessing this page.

2

I had to downgrade to version 1.34.81. Now it works again.

Update Chrome has made it a problem that this site also doesn’t work on its latest version.

3

gvlada,

May interest you:

And over on the right, “Test Your Browser” - do that.

I am using Brave Browser version 1.35.100 for Mac OS.

Probably, the results that you get, should be similar to my BB’s test results – so that you understand, your Brave Browser has a common SSL protocol version and cipher suite:

Screen Shot 2022-02-10 at 12.10.12 AM
Screen Shot 2022-02-10 at 12.10.12 AM956×548 79 KB

Screen Shot 2022-02-10 at 12.10.28 AM
Screen Shot 2022-02-10 at 12.10.28 AM958×360 48.6 KB

Screen Shot 2022-02-10 at 12.10.42 AM
Screen Shot 2022-02-10 at 12.10.42 AM958×593 86.7 KB

Screen Shot 2022-02-10 at 12.11.25 AM
Screen Shot 2022-02-10 at 12.11.25 AM957×598 102 KB

4

Thanks for the comment, but unfortunately none of these SSL/TLS test results does not help to solve the problem

5

I have the same problem just looking at an internal IP.

6

@gvlada , @fakeologist ,

What may work (instructions for Windows OS and Mac OS users):

While running Brave Browser, close all tabs / windows, and then delete as much of the cache, data, and history as you believe that you can.

Next, quit everything. After that, then:

Move the CONTENTS ONLY of the following “CertificateRevocation” folder to the Trash:

%LOCALAPPDATA%\BraveSoftware\Brave-Browser\User Data\CertificateRevocation

aka

C:\Users[UserName]\AppData\Local\BraveSoftware\Brave-Browser\User Data\CertificateRevocation

Mac OS:

/Users/user_username/Library/Application Support/BraveSoftware/Brave-Browser/CertificateRevocation

Restart your computer. After your computer settles down, start Brave Browser and test.