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How to fix ssl_error_no_cypher_overlap with Mozilla Firefox?

Alton Alexander
By Alton AlexanderUpdated on June 3rd, 2022

? The error code ssl_error_no_cypher_overlap means that the client and server could not agree on a common encryption algorithm. This can happen for a variety of reasons, but the most common reason is that the server is configured to use a strong encryption algorithm that is not supported by the client.

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1. Check that the website's SSL certificate is valid and up to date

  1. Check if the website's SSL certificate is valid.
  2. If the SSL certificate is not valid, check if it is up to date.
  3. If the SSL certificate is not up to date, update it.

2. Check that your browser is updated to the latest version

  1. Open your web browser and go to the menu.
  2. Select "Help" and then "About"
  3. Check if there is an update available for your browser.
  4. If there is, install the update and restart your browser.

3. Clear your browser's cache and cookies

  1. In your browser's address bar, type "about:preferences" and press Enter.
  2. In the left-hand column, select "Privacy & Security".
  3. Under "Cookies and Site Data", click "Clear Data".
  4. In the pop-up window, make sure "Cookies and Site Data" is selected and click "Clear".
  5. Close the "Preferences" tab.
  6. Restart your browser.

4. Try accessing the website using a different browser

  1. Check if the website is accessible using a different browser. If it is, then the problem may be with the browser you were using previously.
  2. If the website is not accessible using a different browser, try clearing your browser's cache and cookies.
  3. If clearing your browser's cache and cookies does not fix the problem, try accessing the website using a different device or computer.
  4. If you are still unable to access the website, contact the website's administrator or technical support for further assistance.

5. Contact the website's administrator to resolve the issue

To contact the administrator to resolve the issue, follow these steps:

  1. Open your web browser and go to the website that is displaying the ssl_error_no_cypher_overlap error.
  2. In the address bar, type "about:config" (without the quotation marks) and press Enter.
  3. In the about:config page, type "security.ssl3" (without the quotation marks) in the filter bar and press Enter.
  4. Double-click on the "security.ssl3.dhe_rsa_aes_128_sha" preference and change its value to "false".
  5. Close the about:config page.
  6. Try to access the website again.