The err_ssl_version_or_cipher_mismatch is a common error that can occur when your browser tries to establish a connection to a web server. The error indicates that the browser and website server do not support a common SSL protocol version or cipher suite. These protocols are vital for secure internet connections and safe transfer of data.
Resolving this error is important, whether you are a site administrator or a visitor. Thankfully, there are several ways to resolve the error. This article provides a step-by-step guide on how to fix err_ssl_version_or_cipher_mismatch.
By the end, you will know how to troubleshoot and resolve the error from the browser or server.
What is ERR_SSL_VERSION_OR_CIPHER_MISMATCH?
The err_ssl_version_or_cipher_mismatch is an error that occurs due to a security failure. The error comes up when there is a negotiation failure between your browser and a website’s server.
When you try to access a website, your browser will try to establish a connection with the server. But your browser and the server have to agree on a common cipher and protocol version to establish a secure HTTPS connection.
If the browser and server don’t have a mutual cipher or protocol, the connection will fail. You will see the err SSL version or cipher mismatch error message as a result.
The error may appear differently on various browsers. It can also appear as Error 113 (net::err_ssl_version_or_cipher_mismatch). However, it’s usually accompanied by the message about your connection not being private. This indicates the security issue with this error.
Understanding SSL/TLS Protocols
Secure Socket Layer (SSL) and Transport Layer Security (TLS) are cryptographic protocols. They provide encrypted connections between web browsers and website servers. This encryption is important to ensure that the data sent over the internet, like payment details, is secure.
SSL was the original security protocol, but it’s now mostly deprecated and replaced by TLS. Without SSL or TLS, anyone can intercept your connection and see the data being sent.
These protocols protect the data and verify the identity of the websites. It ensures the browser is communicating with the right servers.
Typically, when you visit a URL, your browser sends a “hello” to the website’s server. The server will respond with its SSL certificate. This SSL certificate shows the cipher suites it supports. The browser will then verify the certificates and agree on the cipher suite to use for the session.
This process is called the TLS handshake. If the handshake succeeds, a secure and encrypted connection will be established. The data sent over this connection will be in an unreadable gibberish format for anyone who may intercept it.
But if the client and server don’t support a common SSL protocol, the browser will not recognize it. In that case, the connection will fail, resulting in the rr_ssl_version_or_cipher_mismatch error message.
When you visit with an SSL/TLS connection, it will have HTTPS instead of just HTTP. The “S” stands for secure, which indicates that the connection is SSL/TLS protected.
Why This Error Occurs
The err_ssl_version_or_cipher_mismatch happens mainly because of outdated protocols. Older versions of SSL, like SSLv3, and early TLS versions like 1.0 and 1.1 have security vulnerabilities. The vulnerabilities can be exploited by attackers.
Most modern browsers no longer support these outdated protocols to protect their users. Security standards like the PCI DSS also require disabling these old protocols.
So what happens if a browser or server using the old protocols connects to a party using the updated protocols or ciphers? The connection will fail.
Common Causes of ERR_SSL_VERSION_OR_CIPHER_MISMATCH
Let us discuss some of the common causes of this error:
Outdated SSL/TLS Certificates
SSL certificates expire after 1-3 years and need to be renewed. A valid certificate confirms the identity of the site and ensures secure connections.
If a certificate expires, it is no longer considered valid by browsers. Browsers will return the err_ssl_version_or_cipher_mismatch error message for the site. So keeping your SSL certificates up-to-date ensures a secure connection. It also ensures a safe browsing experience.
Unsupported Cipher Suites
A cipher suite defines the specific algorithms used for the SSL/TLS handshake. They are a set of cryptographic algorithms used for connection and message authentication.
Your browser and the website server would negotiate a supported cipher suite to establish the connection. This will fail if the client and server don’t support a common SSL protocol version or cipher suite. The browser will then display an err_ssl_version_or_cipher_mismatch error.
For example, let’s say a server is configured to use RC4, which is a known weaker cipher. If your browser doesn’t support this cipher, the connection will fail. You can check which ciphers the website supports using an online tool like Qualys SSL Labs.
Incorrect SSL Configuration on Server
This is another common cause of err ssl version or cipher mismatch errors. The server must present the certificate chain in the correct order to the browser. The browser would expect root CA, intermediate CAs, and then the server’s certificate.
This will result in an error if there’s a missing intermediate certificate. You will also get an error if the server only supports outdated protocols like SSLv3, TLS version 1.0, or 1.1. The browser won’t be able to confirm the server’s certificate. The error can also result from incorrectly configured ciphers.
Browser Cache Issues
Browsers cache website data, including SSL/TLS certificates. If a website updates its certificates, the browser may still be using the cached version.
If the cached version has expired, it will trigger the rr_ssl_version_or_cipher_mismatch error.
Clearing the cache SSL data is a quick err_ssl_version_or_cipher_mismatch fix. It will force the browser to fetch the new certificate. This will, in turn, clear the mismatch error.
Step-By-Step Guide to Fix ERR_SSL_VERSION_OR_CIPHER_MISMATCH
So we have seen some of the common causes for the error. Let us discuss the steps to fixing them:
Step 1: Check Your SSL/TLS Certificate
Expired or self-signed certificates are common causes of the net::err_ssl_version_or_cipher_mismatch error. Self-signed certificates are not issued by a trusted Certificate Authority (CA). As a result, browsers don’t generally trust them.
Expired certificates, on the other hand, are invalid and unacceptable. You must renew the certificate with your CA to regain trust.
Check for Expired Certificates
There are several ways to check a certificate’s expiration. You can use an online tool like Qualys SSL Labs or SSL Shopper to verify the certificate’s validity.
Visit the Qualys SSL Labs, and enter the website’s domain, then click submit. It will generate your site details, including your certificate. The certificate will contain the site’s expiry date.
Alternatively, in your browser, you can click on the lock icon or settings icon in the address bar. Next, click on Certificate or Connection is secure to see whether the certificate is valid.
This will allow you to see the certificate, which will contain the expiry date.
Most hosting providers also provide the tools to check your SSL/TLS status via the cPanel.
If a website is using a self-signed certificate, the browser usually displays a warning or error.
While self-signed certificates are useful for testing, it’s not recommended for public-facing websites.
For production websites, you must obtain a certificate from a reputable CA. You can use Comodo or DigiCert.
Also, check for certificate name mismatch. The domain on the certificate you generate via the browser or Qualys SSL Labs should match that of the browser. Otherwise, it could lead to err ssl version or cipher mismatch error.
Step 2: Enable Modern TLS Protocols
Outdated SSL/TLS protocols are a common cause of the error, as mentioned earlier. To resolve this, you have to disable deprecated versions like SSL 3.0 and TLS 1.0.
As you already know, the deprecated SSL/TLS can be either on the server side (website) or the client side (web browser).
1. Client-Side:
Most modern browsers come with SSL 3.0 and TLS 1.0 disabled by default, so users don’t need to manually disable them. But, outdated browsers and operating systems can still have these old versions enabled.
Ensure your browser and operating systems are up to date. Some browsers, like Chrome and Firefox, have settings to enable/disable TLS versions. However, you should only change these settings if you know what you’re doing.
Enable TLS 1.3 in Chrome Settings
If you get a Chrome err_ssl_version_or_cipher_mismatch error, first try to update the browser. If that fails and you are knowledgeable enough, then type chrome://flags in the address bar on your browser.
Search for ‘TLS’ in the search bar. Find the “TLS 1.3” option and enable it if it’s not enabled.
It should be enabled by default.
Restart your browser for the changes to take effect.
2. Server-side Configuration
For the server side, you will need administrator permission to enable/disable the TLS protocols.
Web hosting Control Panels (CPanel)
Some web hosting providers offer a graphical interface to manage SSL/TLS settings.
The settings location may differ depending on your provider. When you find it, ensure that older, outdated versions like TLSv1 and TLSv1.1 are disabled.
Contact your hosting provider and ask them to enable TLS 1.2 and 1.3 for your website. Send a message to their customer service asking them to enable the modern protocols for your server. This is very handy if you have an err_ssl_version_or_cipher_mismatch WordPress error.
Apache and Nginx:
Did you encounter ERR_SSL_VERSION_OR_CIPHER_MISMATCH Nginx or Apache error? Then you can follow these steps to upgrade your SSL/TLS protocols:
- Access your Apache or Nginx server via SSH or console.
- For Apache, SSL configuration is in the ssl.conf file, while it is in the nginx.conf file for Nginx.
So, back up either file, depending on your server, and edit it with a text editor like vi. - Look for the SSL directive. The default configuration may look something like this: ssl_protocols TLSv1, TLSv1.1, TLSv1.2. This configuration has TLSv1 and TLSv1.1 active.
- Remove the outdated TLSv1 and TLSv1.1 versions to disable them. Then add the newer TLSv3 protocols to enable them alongside TLSv2.
So the correct configuration for Apache will look like this: ssl_protocols -all +TLSv1.2 +TLSv1.3
The ‘-all’ disables all protocols by default, and the ‘+’ adds the specified protocols.
For Nginx, you will have something like this: ssl_protocols TLSv1.2 TLSv1.3; - Save the file and restart Apache or Nginx.
Test the changes:
After making these changes, use an online SSL tool like Qualys SSL Labs to check if the implementation worked. This would show which protocols are currently enabled for your server.
Step 3: Update Server Cipher Suites
Ciphers are combinations of algorithms used for key exchange, message encryption, and authentication. Having strong and modern cipher suites is vital for security and compatibility. A weak cipher like the RC4 can trigger the net::err_ssl_version_or_cipher_mismatch error.
Identify Your Ciphers
To update your cipher suites, first identify the current cipher suites you have. You can do this using an online SSL checker like Qualys SSL Labs. When you analyze your domain on Qualys SSL Labs, it will outline your Cipher suites and other details.
Another way to check your ciphers is to use OpenSSL (command line). Run the command openssl ciphers -v. This command will list your current ciphers.
Test Cipher Suites
After updating the cipher suites, you can test them with OpenSSL (command line). You can also use an online tool to ensure it’s working properly. Qualys SSL Labs does a great job at telling you which cipher suites are weak and which are strong.
Step 4: Clear Browser Cache
Browsers store cached copies of website data, including SSL certificates. Clearing your cached data for the website can clear up any issues with the certificate. It will force your browser to fetch the new and updated SSL/TLS version. Here’s how to clear the cache SSL/TLS details for the popular browsers:
Chrome
If you experience an err_ssl_version_or_cipher_mismatch Chrome error, first clear the cached data. You can clear your browser cache from the settings page. Navigate to the settings page and search for “Delete browsing data.”
Alternatively, type this URL into your Chrome address bar: chrome://settings/clearBrowserData. This will take you to the page to delete browsing data.
Firefox
Deleting cached data can clear err_ssl_version_or_cipher_mismatch Firefox error.
To do this, click on the settings icon at the top right, then click on “Settings.” Then search for “Cache” to find the settings to clear the cached data.
Edge
Deleting the cached data can also clear the err_ssl_version_or_cipher_mismatch Edge error. The process is like that of the other browsers.
Click on the 3 horizontal lines, then click on Settings and search for “cache” to find the clear cache option. Or, you can use this link to access the clear cache page: edge://settings/clear BrowserData/clear.
These browsers give you the option to delete the data from the last hour, last 24 hours, last 7 days, last 4 weeks, or all time. To resolve this error, it is advisable to clear all the data by selecting “All time” from the drop-down list.
If you are experiencing err_ssl_version_or_cipher_mismatch WordPress error and have a WordPress caching plugin activated. Clearing the data cached on the plugin can resolve the error. Check your plugin documentation for how to go about this.
After clearing the cache, close and reopen your browser for the changes to take effect. Try accessing the website again to see if the error has been resolved.
Step 5: Check for Firewall or Antivirus Interference
Firewalls and antivirus software monitor your traffic for security threats. Sometimes this software can mistakenly block legitimate SSL/TLS connections. This happens especially if you have strict settings or outdated security definitions.
Try disabling your firewall/antivirus temporarily to test if it’s causing the issue. Another approach is to whitelist the website you are trying to access. Most antivirus programs have features that scan SSL, and this can conflict with your connection. When you whitelist a website, the security settings don’t apply to it.
Also, consider checking the firewall logs to see if the connection to the website is blocked. This can help pinpoint the issue.
Step 6: Update Your Browser and Server Software
Browser and server software updates come with security patches that fix vulnerabilities. These updates fix bugs and provide support for newer protocols and cipher suites. It helps improve security and prevents connection errors.
Update Browser
Most browsers, including Chrome, update automatically, so you don’t have to do it manually. To update it manually, go to chrome://settings/help. For Firefox, you can check manually by going to the Menu >> Help>>About Firefox.
Edge updates through Windows Update.
Update Server
If you manage servers like OpenSSL or web servers like Apache/Nginx, it is important to keep them up-to-date. Regularly check for security advisories and apply patches promptly.
Advanced Troubleshooting Steps
Here are more advanced troubleshooting steps you can take. This is if the previous standard fixes fail to resolve the issue.
Verify DNS Settings
When you type a domain name in your browser, the browser uses the Domain Name System (DNS) to translate it into the server’s IP address. If the DNS records are incorrect, the browser might connect to the wrong server.
This server could have a different SSL certificate or no certificate at all. In turn, it would lead to the SSL/TLS error.
You can verify your DNS configurations using an online tool like “DNS Checker” or “What’s My DNS.” With DNS Checker, you will need to enter your website’s URL and click Enter.
The tool will then generate your DNS records as shown in the image below.
You can also check the DNS configuration. Use a command-line tool like nslookup for Windows or dig for Linux/macOS. Verify that the returned DNS records are accurate. You can contact your hosting provider if you identify any issues.
Test SSL Configuration Using Online Tools
Online tools like Qualys SSL Labs’ SSL Server Test can perform broad checks on a server’s SSL/TLS setup. Qualys SSL Labs can provide details on the supported SSL/TLS protocols. It can also give details on supported cipher suites, certificate validity, and the chain of trust.
It works by entering the website’s URL in the host field and then clicking submit. This will fetch the website’s SSL/TLS details. As mentioned before, the tool can generate the SSL/TLS certificate and cipher suites.
It will also list out the supported and disabled protocols. For the example in the image below, older versions are disabled while TLS 1.2 and 1.3 are enabled.
Qualys SSL Labs also assigns grades (A+, A, B, C, etc) to websites based on their security architecture.
There are other tools like CrypCheck and Securityheaders.io that can provide useful information.
Any errors you identify should be swiftly addressed. Do this by adjusting the server’s SSL/TLS configuration.
Reinstall or Regenerate SSL Certificate
Reissuing and reinstalling an SSL certificate can be a last resort if the troubleshooting steps fail. Reinstallation is helpful if the test indicates any issue with the certificate chain. Likewise, with other certificate-related issues that can’t be fixed through configuration changes.
Reinstall Certificate
The process to reinstall your SSL/TLS certificate depends on the issuer. For certificates issued by a CA, download the certificate file. This includes the certificate, intermediate certificates, and private keys from the CA’s website. Then, follow the instructions provided by the web server or hosting provider to reinstall the certificate.
For Let’s Encrypt certificates, use a tool like the CertBot client to renew or reissue the certificate.
Regenerate Certificate
Regeneration involves creating a new Certificate Signing Request (CSR). It also involves obtaining a new certificate from the CA. This updates the domain name, adds SANs, or replaces compromised keys. Certificate regeneration can resolve the errors.
Contact your certificate issuer for guidance on how to regenerate your certificate.
Best Practices to Avoid ERR_SSL_VERSION_OR_CIPHER_MISMATCH
We have provided detailed steps on how to fix the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error. But it is not enough. You should also know how to avoid this error. Prevention is better than a cure, right?
Regularly Update SSL/TLS Configurations
SSL/TLS standards and best practices have changed over time. This is due to the discovery of new vulnerabilities. But the basics still remain the same. Regular updates are essential for maintaining strong security and preventing err_ssl_version_or_cipher_mismatch errors.
- Keep cipher suites up-to-date.
- Use modern and secure cipher suites that have strong encryption algorithms and Perfect Forward Secrecy (PFS).
- Avoid using outdated ciphers like RC4 and DES. Use a tool like the Mozilla SSL Configuration Generator to find modern cipher suite suggestions.
- Disable outdated SSL/TLS protocols like the SSLv2, SSLv3, TLS 1.0, and TLS 1.1.
- Regularly check your setup to stay alert to new vulnerabilities.
Monitor Expiry of SSL Certificates
As mentioned earlier, SSL certificates have expiry dates. When the certificate expires, browsers will display warning errors when users try to access the website. It is important to check the expiry date and renew the certificate before it expires to avoid issues.
Consider setting reminders to alert yourself about upcoming certificate expirations. Renew the certificate a month or two before expiration.
Alternatively, you can activate auto-renewal if you have the option. This way, the certificate will be renewed automatically.
Use Reputable Hosting Providers
The hosting provider handles the server infrastructure and its security. A good provider will keep their server up-to-date and implement strong security measures. They also provide support for modern protocols and offer reliable certificate management options.
When choosing a hosting provider, ensure they support modern SSL/TLS. Ensure they also offer easy SSL certificate installation and management. Further, they should have adequate security measures and responsive customer support.
Conclusion
ERR_SSL_VERSION_OR_CIPHER_MISMATCH error can be frustrating to deal with. Thankfully, it’s resolvable. When you understand the error and its causes, you can take the steps to fix it and restore a secure connection.
In this guide, we’ve explored the common reasons behind the error. We looked at how outdated protocols and unsupported ciphers in browser caches, etc, can cause the error. We also looked at the steps to troubleshoot and how to fix err_ssl_version_or_cipher_mismatch.
Here’s a Quick Recap:
- The error happens when the website server or browser uses an unsupported protocol or cipher.
- Clearing your browser cache is a fast err_ssl_version_or_cipher_mismatch fix. This forces the browser to search for updated certificates.
- Maintain up-to-date SSL/TLS protocols and cipher suites in the server. Disable outdated server protocols and enable modern protocols like TLS 1.2 and TLS 1.2.
- Keep your browser and servers updated to ensure you have the latest security patches.
- Monitor and renew your SSL certificate before it expires.
- Regularly monitor your SSL configurations and stay ahead of issues.
- Choose a reputable hosting provider that offers strong security measures. They should also support modern SSL/TLS protocols and cipher suites.
FAQs
What Causes ERR_SSL_VERSION_OR_CIPHER_MISMATCH?
The error occurs when the client and server don’t support a common SSL protocol version or cipher suite for encrypting the connection. This can happen due to outdated or weak cipher suites offered by the server.
The error can also happen due to outdated SSL/TLS protocols like SSLv3, TLS 1.0, and TLS 1.1. It is recommended to disable these protocols and enable modern protocols like TLS 1.2 and TLS 1.3.
This can be due to certificate issues like incorrect certificate chains or expired certificates. It is also due to an outdated browser or software, or firewall/antivirus interference.
Can this Error be Fixed Without Accessing the Server?
The RR_SSL_VERSION_OR_CIPHER_MISMATCH error is usually a server-side issue. This means the problem lies with the server, and you need administrative access to fix it. However, cases where it is a client-side issue are due to outdated browsers, incorrect system time, and cached data on the browser.
You can fix these without accessing the server by updating your browser, fixing the time, or clearing the cache.
Which tools can I use to check SSL configurations?
There are several tools out there for checking SSL configurations. Qualys SSL Labs’ SSL Server Test is one of the widely used tools for testing SSL/TLS configurations. It provides details on the supported protocols, cipher suites, certificate validity, and vulnerabilities. It also performs a handshake simulation with various browsers and clients.
CrytCheck and Securityheader.io are other tools you can use to check SSL configuration. You can also use OpenSSL (a command-line tool) and browser developer tools to view a site’s SSL configuration.
