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WebUI display err_ssl_protocol_error


I have a cluster of 2 R80.20 machines on open servers.

Everything was fine but suddenly I can't browse one of the members.

In Chrome I get an error:

This site can’t provide a secure connection

x.x.x.x sent an invalid response.

Try running Windows Network Diagnostics.

In IE I get:
Can’t connect securely to this page
This might be because the site uses outdated or unsafe TLS security settings. If this keeps happening, try contacting the website’s owner.
Tried to enable all TLS options in IE and it didn't help.
I also tried Firefox but same result. 
The other cluster member has no issues, and they are identical.
What can be the problem?
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4 Replies

can you still connect to that cluster member via ssh?

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Look if your symptoms are consistent with sk147493. IF yes, open a support request or upgrade to the latest Jumbo

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Hi Val,

I can connect using SSH. We are on Take141.

So I'm note sure we're hitting that SK.

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When a browser shows the Err_ssl_protocol_error, it indicates the browser is no longer able to access or initiate the secured communication. There is no definite guide for managing this error. Follow given steps to resolve this error from Client side:

  • Try correcting the system date and time.
  • Try clearing Google Chrome browsing data.
  • Try clearing your SSL State.
  • Try disabling the QUIC Protocol.
  • Try checking your antivirus settings.
  • Try enabling all SSL/TLS versions.

    Also, this error is because of the following server side problems:
  • Invalid SSL or SSL is untrusted (self-signed)
  • SSL Not installed properly
  • Old Technology or SSL/TLS version for encryption


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