![]() There can also be other issues, such as a mismatch between the actual domain of the webpage and the domain mentioned in the certificate. For example, if the certificate has expired, is invalid, or is not set up correctly, the browser deems the website unsafe. RELATED: How To Troubleshoot Internet Connection Problems Why Is My Connection Not Private?Ī problem with a website’s SSL certificate can cause your connection to be not private. This information is then shared with the website server that uses its private key to decrypt it, following which both can safely communicate without worrying about someone intercepting the data. ![]() Once satisfied with the SSL certificate details, the browser generates a random session key and uses the public key included in the certificate to encrypt it. It’s a digital certificate that verifies the identity and security of a website and includes information such as the domain name, the organization name, the issuing authority, the certificate expiry date, and a public key. Certificate contains the same serial number as another certificateĮrror code: SEC_ERROR_REUSED_ISSUER_AND_SERIALįor a list and brief description of other secure connection errors, see NSS and SSL Error Codes in Firefox documentation.To create an encrypted connection with a website, a web browser, such as Chrome or Firefox, first attempts to verify that website’s SSL certificate.For more information, see How to troubleshoot time related errors on secure websites. Make sure your computer is set to the correct date, time and time zone. An incorrect system date can cause Firefox to detect that the website's security certificate is expired or invalid. See this article's section on Antivirus products for help with specific security products that can produce these errors, such as Avast, AVG and ESET software.Īlternatively, you can uninstall third-party security software and use Windows Defender, the built-in antivirus.įirefox uses certificates on secure websites to ensure that your information is being sent to the intended recipient and can't be read by eavesdroppers. If you see secure connection errors on multiple secure websites, updating your security product or modifying its settings may resolve the issue. This can produce connection errors or warnings on secure websites. Many security products use a feature that intercepts secure connections by default. ![]() Other websites may require HTTP Strict Transport Security (HSTS) and will not allow access with an insecure connection. Note: The option to enable TLS 1.0 and 1.1 has been removed from the error page in Firefox version 97. For more information, see this Mozilla blog post. Websites that don't support TLS version 1.2 or higher will display a Secure Connection Failed error page with Error code: SSL_ERROR_UNSUPPORTED_VERSION and a message that says, This website might not support the TLS 1.2 protocol, which is the minimum version supported by Firefox. Since Firefox version 78, the minimum TLS version allowed by default is TLS 1.2. Contact the owners of the website and ask them to update their TLS version to a version that is still current and still secure. Firefox protects you by preventing navigation to such sites if there is a problem in securely establishing a connection. Some websites try using outdated (no longer secure) Transport Layer Security ( TLS) mechanisms in an attempt to secure your connection. There is no option to add a security exception to visit the website. The error page will include a description of the potential security threat and an Advanced… button to view the error code and other technical details. Please contact the website owners to inform them of this problem.ĭid Not Connect: Potential Security IssueĬertain secure connection failures will result in a Did Not Connect: Potential Security Issue error page.The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.The error page will also include the following information: There is no option to add a security exception to bypass this type of error. If Firefox cannot establish a secure connection, it will display a Secure Connection Failed or Did Not Connect: Potential Security Issue error page.Ī Secure Connection Failed error page will include a description of the error and a Try Again button. When a website that requires a secure ( HTTPS) connection tries to secure communication with your computer, Firefox cross-checks this attempt to make sure that the website certificate and the connection method are actually secure. 1.2 Did Not Connect: Potential Security Issue.1 Secure connection cannot be established.
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