Err_ssl_version_or_cipher_mismatch – How To Sort Out it Easily

Webmasters and website owners always want their site to be secured with an SSL certificate. However, improper installation or misconfiguration of an SSL certificate ends up with an error like Err_ssl_version_or_cipher_mismatch.

As a part of our Server Management Services, we help our customers to fix such SSL errors.

Here, let’s discuss various reasons for SSL errors and how to fix such errors.

Importance of SSL certificate

It is really worth to implement an SSL certificate on a website. Because an SSL certificate encrypts data between the browser and the webserver. So, the sensitive data are transmitted safely with the help of an SSL certificate.

Important features of SSL are listed below,

  • Secure data transmission.
  • SEO Benefits.
  • Provide credibility and confidence to the users.


Reasons for err_ssl_version_or_cipher_mismatch

Sometimes, the website shows an error err_ssl_version_or_cipher_mismatch due to improper SSL installation or because of misconfiguration or outdated version on the server.

The error looks like,


How to fix err_ssl_version_or_cipher_mismatch

Let’s see how our Support Engineers fix the SSL errors.


1. Outdated version

One of the reasons for SSL error is an outdated TLS version on the webserver. If a website uses an SSL certificate, the browser and the webserver needs to ensure the certificate and SSL/TLS connection is valid. Then,  the SSL error rises if the browser does not validate the certificate due to the old TLS version.

So, it is necessary to use the latest TLS version on the server.

Also. many customers face this SSL error after their site migration, this happens when the domain still points to the old IP address.

So, our Support Engineers fix the error by update the DNS records with the proper IP address.


Other common SSL error

Another common SSL error x509 certificate routines:x509_check_private_key:key values mismatch happens due to incorrect private key or public key files are set up in the configuration file.

Often, when restarting Apache, the following error message may appear in the error log,

[error] mod_ssl: Init: ( Unable to configure RSA server private key (OpenSSL library error follows)
SSL Library Error: 185073780 error:0B080074:x509 certificate routines: X509_check_private_key: key values mismatch
OpenSSL:error:0B080074:x509 certificate routines:x509_check_private_key:key values mismatch


To resolve this issue, our Support Engineers specify the correct private key for the certificate in the configuration file.


[Need assistance to fix SSL errors? – our Support Engineers will help you.]



In short, improper installation or misconfiguration of an SSL certificate may end up with an error like err_ssl_version_or_cipher_mismatch. Today, we saw how our Support Engineers fixed the SSL errors.

The post Err_ssl_version_or_cipher_mismatch – How To Sort Out it Easily appeared first on Bobcares.

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