[Fixed] SSL_ERROR_NO_CYPHER_OVERLAP

https://i.postimg.cc/x1rgH39S/[Fixed...ER_OVERLAP.jpg

You may encounter a variety of issues related to the browser on the web. So, if you are utilizing the Mozilla Firefox web browser, among those prospective problems is the SSL_ERROR_NO_CYPHER_OVERLAP. If you don’t know what is causing it, it can be frustrating and worrying.

You can take some straightforward actions to fix and also resolve this problem. However, getting a much better understanding of the factors behind this error will assist you in fixing it quickly.

In this blog, I will discuss the SSL_ERROR_NO_CYPHER_OVERLAP and what are its common reasons. I will explain how to fix it utilizing possible techniques.

What is the “SSL_ERROR_NO_CYPHER_OVERLAP” Error?

Unlike other internet browser errors, the SSL_ERROR_NO_CYPHER_OVERLAP mistake happens, particularly with Firefox. However, Google Chrome also has a somewhat various yet similar version of it, with a different message “ERR_SSL_VERSION_OR_CIPHER_MISMATCH.”

Full Article Source: https://www.temok.com/blog/ssl_error_no_cypher_overlap/

Reset SSL3 and TLS Settings
If you’re already using the latest version of Firefox or updating didn’t help, the next step is resetting your SSL3 and TLS settings. Not all websites require these protocols to make a connection, but some do. Therefore, if these settings in your Firefox browser are disabled, it might be the reason you’re running into the “SSL_ERROR_NO_CYPHER_OVERLAP” error.

To reset your SSL3 & TLS Settings:

Open a new tab in your Firefox browser and type “about:config” in the address bar. You may see a message saying, “This might void your warranty!” or “Proceed with Caution”.

This warning is Firefox’s way of preventing users, such as yourself, from accidentally making critical changes to your browser’s settings. But we know what we’re doing, so click on Accept the Risk and Continue to proceed.

The “Advanced Preferences” screen should appear. In the search bar, type “tls”.
advanced preferences error code solution
This generates the list of all your TLS configurations.


Values that are bolded indicate that they have been changed. Right-click on them and select Reset to restore them to the default settings.
Afterward, repeat the same process for SSL3. Type “ssl3” in the search bar, and reset any changed value.
how to fix error code SSL_ERROR_NO_CYPHER_OVERLAP
Additionally, make sure that the following two items are set to false.

security.ssl3.dhe_rsa_aes_128_sha
security.ssl3.dhe_rsa_aes_256_sha
Setting these to false disables Firefox from using these low-encryption cyphers. This is essential for security purposes.