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How to Fix ERR_SSL_PROTOCOL_ERROR: SSL Problem Resolution Guide

fix ssl protocol error
29
Nov

What is ERR_SSL_PROTOCOL_ERROR?

ERR_SSL_PROTOCOL_ERROR is a common error encountered when attempting to connect to a website that uses SSL (Secure Sockets Layer) to encrypt data. This error can occur due to several reasons, such as incorrect SSL settings on the website server, issues with your browser, or an unsecured internet connection.

How does ERR_SSL_PROTOCOL_ERROR appear on different browsers?

1. Google Chrome

  • Warning message: “This site can’t provide a secure connection” or “ERR_SSL_PROTOCOL_ERROR”
  • Normally, a red lock icon will be displayed on the URL address bar, along with a “Advanced” button to view additional details.

2. Mozilla Firefox

  • Warning message: “Secure Connection Failed” or “SSL_ERROR_PROTOCOL_ERROR”
  • Firefox may prompt users to verify SSL certificates and network settings.

3. Microsoft Edge

  • Warning message: “Can’t connect securely to this page”
  • Edge will recommend that users try refreshing the webpage or notify the website owner to check their SSL settings.

4. Safari (macOS & iOS)

  • Warning message: “Safari Can’t Open the Page” or “This Connection Is Not Private”
  • Safari will warn that this connection may not be secure and may suggest that users return to the previous webpage.

Causes of ERR_SSL_PROTOCOL_ERROR

  1. The SSL certificate is invalid or expired. This error may occur if the website’s SSL certificate has expired or was not issued by a trusted authority.
  2. The browser may have a cache or cookie error. Damaged cached data or cookies may cause SSL connection issues.
  3. Incorrect time and date settings: The time and date on your computer must match the current time. Otherwise, SSL may not verify correctly.
  4. Incorrect SSL and TLS Protocol Settings – If TLS or SSL protocols are disabled in your browser, this error may occur.
  5. Firewalls or antivirus software may block SSL connections. Some security software may block SSL connections, preventing browsers from verifying the security of websites.
  6. The SSL server does not support the protocol required by the browser. If the server does not support a modern version of TLS, the browser may be unable to connect.

How to Fix ERR_SSL_PROTOCOL_ERROR

1. Check the time and date settings on the device.

  • Go to Settings > Time & Language > Date & Time on Windows.
  • On macOS, go to System Preferences > Date & Time
  • Make sure the time and date are correct and set to “Automatic.”

2. Clear your browser’s cache and cookies.

  • For Google Chrome:
    • Go to Settings > Privacy and Security > Clear Browsing Data
    • Select “Cookies and other site data” and “Cached images and files”
    • Press “Clear data.”

3. Update or change your browser.

  • Try updating Chrome, Firefox, or Edge to the latest version.
  • If you continue to encounter issues, please try using a different browser to see if the same error occurs.

4. Temporarily disable the firewall or antivirus software.

  • If you are using antivirus software such as Avast or Kaspersky, try temporarily disabling the HTTPS scanning.
  • In Windows, go to Control Panel > System and Security > Windows Defender Firewall and temporarily disable the firewall to test the connection.

5. Enable TLS and SSL protocols if they are disabled.

  • In Google Chrome:
    • Go to chrome://flags and search for “TLS”
    • Enable TLS 1.2 and TLS 1.3

6. Verify the website’s SSL certificate.

  • Use online tools such as SSL Checker to verify whether the website’s SSL certificate is functioning properly.

7. Reset network settings

  • Open Command Prompt (cmd) and use the following command:
    • netsh int ip reset
    • netsh winsock reset
    • ipconfig /flushdns
  • Restart your computer and try accessing the website again.

8. Check the website server.

  • If you are a website owner, check your server or web hosting to ensure that the SSL certificate is installed correctly.
  • Use Let’s Encrypt or a trusted SSL certificate service.
  • Update the server software to support the latest version of TLS.

ERR_SSL_PROTOCOL_ERROR may be caused by several issues, but it can be resolved using the methods mentioned above. If you continue to encounter the problem, you should contact your web hosting provider or check your browser and network security settings. Using a trusted SSL certificate and regularly updating your software can help prevent future SSL issues.

If you are experiencing the ERR_SSL_PROTOCOL_ERROR issue on your website, we recommend trying our Web Hosting service from VisperHost, which includes free SSL Certificates and assistance from our expert team.