Fix ‘ERR SSL VERSION OR CIPHER MISMATCH’ error message Issue – Guide
When you visit a website that uses HTTPS, your browser and web server go through several processes to verify that the certificate and SSL/TLS connection are legitimate.
Some browsers will not allow you to visit a site if the SSL certificate is not valid. ..
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Reasons for ERR_SSL_VERSION_OR_CIPHER_MISMATCH
The ERR_SSL_VERSION_OR_CIPHER_MISMATCH error can occur when the SSL certificate or cipher mismatch is detected.
A user on their WordPress site was having trouble migrating to Kinsta from another host because they were using a SSL certificate that wasn’t working. Chrome was preventing the user from loading the page, so the problem was with the SSL certificate.
You may also see a variation of the error, such as: The error you are seeing is due to a typo. ..
An unknown error occurred while trying to connect to the SSL server.
The client and server do not support SSL protocol version or cipher suite.
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SSL certificates are a way to ensure that your website is secure. If you do not have a valid SSL certificate, your website may be vulnerable to attack. To check whether your website has a valid SSL certificate, visit https://ssl.certificate-authority.com/.
Check for certificate name mismatch in the certificate chain.
The old version of TLS is no longer supported and should be replaced. ..
The RC4 cipher suite is a popular algorithm used to encrypt data. ..
In Chrome, the SSL state is clear. This means that the SSL certificate is valid and the connection is secure.
Apple’s new operating system, iOS, is designed to be more user-friendly and efficient than its predecessor, Mac OS. With iOS, users can access their favorite apps and content more easily, and the system is designed to be more responsive and efficient than previous versions.
Check your SSL certificate
If you see this error, the first and easiest place to start is to perform an SSL check on the website. We recommend using Qualys SSL Labs’ free SSL verification tool. It is very reliable and we use it for all Kinsta clients when verifying certificates. Just enter your domain in the Hostname field and click “Submit”.
You can also choose to hide public results if you prefer. It may take a minute or two to verify your site’s SSL/TLS configuration on your web server. ..
Check for certificate name mismatch
- A mismatch in the name of the SSL certificate
- A mismatch in the type of SSL certificate
- A mismatch in the cipher suite
The website does not use SSL, but shares an IP address with some other website that does.
The website no longer exists, but the domain still points to the old IP address where another website is hosted.
The website uses a content delivery network that does not support SSL. This means that the site can’t be authenticated or encrypted, which could make it vulnerable to attack.
The domain name alias is for a website whose name is different, but the alias was not included in the certificate.
If you’re having trouble accessing a website because the domain name in its certificate is no longer valid, you can check to see if the domain is still registered by opening Chrome DevTools and clicking on the security tab. The registered domain will be displayed in the certificate information. If it’s not, that means the certificate has expired and you won’t be able to access the site. ..
The SSL certificate for the website domain is issued by a different company than the website itself.
There are many different types of SSL certificates, but they should all be the same for a typical website. However, in our case, the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error prevented us from checking it with Chrome DevTools. That’s where a tool like SSL Labs can come in handy. ..
Check the old version of TLS
If you’re a Kinsta customer, you never have to worry about your web server’s TLS version. We always update our servers to the latest and greatest supported versions, and Cloudflare enables TLS 1.3 by default. ..
If you are using legacy versions of TLS, you may want to fix ERR_SSL_OBSOLETE_VERSION notifications in Chrome. These notifications tell you when your current version of TLS is no longer supported by Chrome and should be replaced with a newer version. ..
SSL Labs can help you determine whether your current TLS version is up to date. If it’s old, you can contact your host and ask them to update the TLS version.
The Transport Layer Security (TLS) 1.3 protocol was released on March 14, 2018. This new protocol offers improved security and performance over TLS 1.2. ..
Check the RC4 Cipher Suite
Google has released a document stating that Chrome 48 removes the RC4 cipher suite. This is not common, as it can happen in larger enterprise deployments that require RC4. Why? Because updating and upgrading on larger and more complex configurations can take longer. ..
Security researchers, Google and Microsoft recommend that RC4 be turned off on your server. Therefore, you must make sure that the server configuration is enabled with a different cipher suite. You can view the current cipher suite in the SSL Labs tool.
Clear SSL state in Chrome
- Open Chrome.
- Click on the three lines in the top left corner of the window that say “Settings.”
- Scroll down to the bottom of the Settings window and click on “Security.”
- In the Security section, click on “Clear SSL state.”
In the “On startup” section, click the “Advanced” button. In the “Startup settings” section, under “Display”, click the “Resize windows automatically” checkbox. This will resize your browser windows automatically to their maximum size. ..
In the advanced settings, you can control how your website looks and behaves. You can choose to have your website look like a traditional website, or you can use a more modern design. You can also choose to have your website run in a web browser, or on a device that is not connected to the internet.
In the Internet Properties dialog box, click the Connections tab. In the Connections tab, under LAN settings, click the Properties button. The LAN Properties dialog box appears. Under Proxy server, type the proxy server address and port number. Under Use default proxy server if no proxy is specified, type http://localhost:8080/proxy as the proxy server address and 8080 as the port number. ..
Select the “Write for Us” button. Enter your email address in the “Email Address” field. Select the “Create an Account” button. Enter your name and password in the “Name” and “Password” fields, respectively. Click on the “Create Account” button. ..
The SSL state will be cleared.
Use a new operating system
Operating systems become outdated with newer technologies, such as TLS 1.3 and newer cipher suites. Specific components in the latest SSL certificates simply stop working. Google Chrome actually shut down Windows XP in 2015. We always recommend upgrading to newer operating systems if possible, such as Windows 10 or the latest version of Mac OS X. ..
Temporarily disable antivirus
If you are still seeing the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error, we recommend temporarily disabling your antivirus program. This may help to resolve the issue. ..
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Final note
If you’re getting an error message like “Fix ‘ERR SSL VERSION OR CIPHER MISMATCH’ error message” when trying to connect to a website using SSL, there’s a good chance you need to update your encryption certificate. ..
