The test will inspect whether the SSL/TLS certificate is valid and trusted. To use the Qualys SSL Labs tool, simply type in the URL of your site and wait until Qualys SSL Labs generates the server test results. It can also inform whether your SSL/TLS certificate is old and requires an update. This tool will grade the SSL connection and detect if there is any mismatch with the server. Use online tools like Qualys SSL Labs to run an SSL certificate check. If the SSL/TLS certificate is old or invalid, that may trigger an error message. Check the SSL/TLS CertificateĬhecking the site’s SSL/TLS certificate is an excellent place to start fixing the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error. Let’s check six ways to fix the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error. The ERR_SSL_VERSION_OR_CIPHER_MISMATCH error is easy to fix despite its complicated and intimidating looks for beginners.
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How to Fix the ERR_SSL_VERSION_OR_CIPHER_MISMATCH Error
The error may also occur on websites that use Cloudflare CDN (content delivery network) and security add-ons. Websites that use these encryptions have a lock icon in the URL bar. It’s important to note that the error only occurs on websites that use SSL certificates and HTTPS encryption to secure access and information exchange. Antivirus program – a misconfiguration in the antivirus program may trigger a false alarm that results in the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error.Web browser’s cache – the cached data may not reflect the website’s security update.QUIC protocol – a Google project that acts as an alternative to common security solutions but may trigger the error.Outdated web browsers or operating systems – older operating systems and web browsers may not support the latest version of TLS.Old TLS versions – the web server may use an old version of TLS that new web browsers no longer support.Invalid SSL certificates – the domain’s SSL certificate may be assigned for a different domain name alias, thus triggering a certificate mismatch error.
There are several issues that make a web server, and a web browser fail to support a common SSL protocol, and thus, triggering the error message ERR_SSL_VERSION_OR_CIPHER_MISMATCH: In addition, a website may use an unsupported version of a protocol that has security flaws, which may be harmful to your device or the information that goes to the website. The ERR_SSL_VERSION_OR_CIPHER_MISMATCH error message is the browser’s way of protecting you from accessing unsafe websites. What Causes the ERR_SSL_VERSION_OR_CIPHER_MISMATCH Error? In that case, the browser will automatically display the error message ERR_SSL_VERSION_OR_CIPHER_MISMATCH. Suppose the user’s browser and the web server fail to support a common SSL protocol version or cipher suite during the TLS handshake. TLS (Transport Layer Security) is a protocol that ensures secure communication between a user’s computer and a web server. This process is known as a TLS handshake. It’s a way to prove that the accessed website is genuine and has implemented the correct protocol to secure your connection. Website browsers automatically check the SSL certificate of the website every time you try to connect to it.
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