Sometimes errors happen, and when they do, it’s critical that you know how to fix the most frequent ones. Err ssl version or cipher mismatch is one of those errors.
To resolve the "ERR_SSL_VERSION_OR_CIPHER_MISMATCH" error on Cloudflare, you can follow these steps:
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Check SSL/TLS Settings on Cloudflare Dashboard:
- Log in to your Cloudflare account.
- Navigate to the SSL/TLS tab in your Cloudflare dashboard.
- Ensure that your SSL/TLS encryption mode is set to "Full" or "Full (strict)." This ensures end-to-end encryption between your server and Cloudflare.
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Verify SSL Certificate:
- Check if your SSL certificate is valid and properly installed on your origin server. You can use online SSL checker tools to verify the certificate.
- Ensure that the SSL certificate is issued for the correct domain and hasn't expired.
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Update SSL/TLS Version:
- Ensure that your server supports modern SSL/TLS versions. Upgrade your server's SSL/TLS configuration to support TLS 1.2 or higher.
- Disable SSL protocols that are known to be insecure, such as SSLv3 and TLS 1.0.
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Check Cipher Suites:
- Review the cipher suites supported by your server. Make sure it supports strong cipher suites recommended for security.
- Disable weak cipher suites and prioritize the use of stronger ones. This can usually be configured in your server's SSL/TLS configuration.
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Clear Browser Cache and Cookies:
- Sometimes, the error may be due to a temporary issue with browser cache or cookies. Clear your browser cache and cookies, then try accessing the website again.
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Check Firewall and Security Plugins:
- If you're using a firewall or security plugins on your server, ensure that they're not blocking connections from Cloudflare. Whitelist Cloudflare IP ranges if necessary.
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Inspect Server Logs:
- Check your server logs for any errors or warnings related to SSL/TLS connections. This can provide insights into what might be causing the issue.
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Contact Cloudflare Support:
- If you've tried all the above steps and the issue persists, contact Cloudflare support for further assistance. They can provide guidance specific to your setup and help diagnose the problem.
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Consider Professional Help:
- If you're not comfortable making changes to your server or Cloudflare settings, consider hiring a professional to assist you. They can ensure that your SSL/TLS configuration is properly set up and secure.
To fix as a webmaster or developer
Login to Cloudflare, click on SSL/TLS. Open Edge Certificates and scroll down to Minimum TLS Version. Select TLS 1.0 as Default. This should resolve the problem! Don’t forget to purge cache.
By following these steps, you should be able to troubleshoot and resolve the "ERR_SSL_VERSION_OR_CIPHER_MISMATCH" error on Cloudflare.