err_ssl_version_or_cipher_mismatch’ error if you are using Internet Explorer 8 on Windows XP or Google Chrome, for example. Therefore, it is pretty certain that you will see ‘ Site uses an unsupported protocol. Some older operating systems and browsers don’t support recent TLS protocols. Possible local issues to fix err_ssl_version_or_cipher_mismatch You can check this with the SSL Labs tool. The Microsoft, Google, and security researchers, in general, recommend disabling RC4 cipher suite.
Although it is not a common issue, some larger enterprises might face this problem since it takes more time to update anything on a larger scale. The Chrome developers removed the RC4 in version 48. If your hosting provider can’t offer at least TLS 1.2 version, it might be a good idea to switch to a different provider. If you notice an old TLS version, contact your hosting provider and ask for the minimum SSL/TLS version supported in order to avoid ‘err_ssl_version_or_cipher_mismatch’ error.Īlso, the TLS 1.3 version has been published on August 21st, 2018 and it offers better security and faster speeds. Most WordPress hosting providers take care of this behind the curtain to ensure maximum compatibility. There should also be some backward compatibility with older TLS versions since not everyone uses the latest operating systems and browsers. Checking for an old and unsupported version of TLSĪll hosting providers should use at least TLS 1.2 version on their servers, ideally. Personally, we prefer the Qualys SSL Labs test as most of the browsers will not pull the certificate info if there’s an issue with it.ģ. Click on ‘Certificate’ and you will see a popup with information about the SSL certificate for that particular site. Simply click on the padlock icon at the beginning of the address bar. You haven’t included your domain name alias in the certificateĪnother method you can use to check your certificate is through the browser.There is no SSL support on CDN you are using.The domain name is pointing to an old IP address where another site is hosted.There are other reasons why the browser might throw this error such as: The has an SSL certificate that checks out. In this case, we have a subdomain which does not use SSL but shares the same IP address as the domain.
The Certificate Name mismatch is a pretty common issue that can occur. The test is very reliable and it will let you know if there’s any SSL certificate error. There’s also an option to hide the results if you want to. The results will not appear instantly, but it shouldn’t take more than a couple of minutes.
All you have to do is type the full URL of your site and click ‘ OK‘. The Qualys SSL Labs has an excellent tool that will tell you anything you need to know about your SSL certificate.
The first step we recommend is checking your SSL certificate. In order to find the cause for ‘err_ssl_version_or_cipher_mismatch’ error (or rule out that it is a server-side issue), we need to check the following: Possible server-side issues for ‘err_ssl_version_or_cipher_mismatch’ error When asking where, we are trying to figure out is it a server-side issue (SSL certificate, web servers settings, etc.) or a local issue (browser, operating system, settings, etc.). In order to fix it, we need to establish what caused it and where does it come from. You have probably encountered this error at some point. If any of these fail for any reason, the browser will return the following error – ‘err_ssl_version_or_cipher_mismatch’. There are a number of steps that occur when establishing a secure connection between a browser and a website: TLS handshake, decryption, checking the certificate against CA (Certified Authority), and so on.