In browser every once in a while I get ERR_SSL_PROTOCOL_ERROR

in Chrome browser every once in a while I get

This site can’t provide a secure connection sent an invalid response.

I reload the page and still happens the a few minutes later it will come back online like nothing happened.
The 3 times I happened I loaded another browser and it came back don't know if it was a coincidence. But it was a few minutes after reloading.
I tested with SSL Labs and every thing is good from what I see.

thanks for any help

Just happened again this time loaded firefox and got this

An error occurred during a connection to SSL peer rejected a handshake message for unacceptable content. (Error code: ssl_error_illegal_parameter_alert)

The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
Please contact the website owners to inform them of this problem.

Just checked again back to normal


Do you happen to use AV software or a transparent proxy that scans https traffic? That’s usually done using a local CA certificate so that the AV software or proxy can MitM the connection. I’ve seen intermittent errors caused by buggy implementations of that. More specifically, your Firefox error code has been connected to some Kasperksy products (but not necessarily just limited to that).

From what I can tell, your server configuration looks fine, so I’d look into client-side issues first.

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I was just coming here to say that in Internet Explorer

I just rebooted my computer after what I thought the server went down after reboot of my home computer its back to normal so guess that was it anti virus Avast strikes again.
when I click on the lock here’s what IE its showing

thanks for the fast reply

Yeah, Avast is not exactly known for their stable and secure MitM proxy. :blush:

… or really for being seucre at all. :unamused:


I think it’s a problem from your computer. You should try this, I found it from Google. It might helped to resolve Err_SSL_Protocol_Error on your Google Chrome browser.

How To Fix Err_SSL_Protocol_Error In Google Chrome

The problem comes from your computer. I have some suggestions that will help you solve the Err_SSL_Protocol_Error problem on your Google Chrome browser. This tutorial could help you

Thank s
No longer have the site and no longer the computer but I was able to fix it just forgot how.