Secure connection failed and Firefox did not connect
This article explains why you may see a Secure Connection Failed or a Did Not Connect: Potential Security Issue error page and what you can do.
Table of Contents
Secure connection cannot be established
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. If Firefox cannot establish a secure connection, it will display an error page.
Secure Connection Failed
A Secure Connection Failed error page will include a description of the error, an option to report the error to Mozilla and a
The error page will also include the following information:
- The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
- Please contact the website owners to inform them of this problem.
Did Not Connect: Potential Security Issue
Certain secure connection failures will result in a Did Not Connect: Potential Security Issue error page.
The error page will include a description of the potential security threat, an option to report the error to Mozilla and an
Website issues
TLS version unsupported
Some websites try using outdated (no longer secure) Transport Layer Security(TLS) mechanisms in an attempt to secure your connection. Firefox protects you by preventing navigation to such sites if there is a problem in securely establishing a connection. Contact the owners of the website and ask them to update their TLS version to a version that is still current and still secure.
Starting in Firefox version 74, the minimum TLS version allowed by default is TLS 1.2. 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 This website might not support the TLS 1.2 protocol, which is the minimum version supported by Firefox. The error page may also include a button,
HSTS required
Other websites may require HTTP Strict Transport Security (HSTS) and will not allow access with an insecure connection.
Security software conflict
Many security products use a feature that intercepts secure connections by default. This can produce connection errors or warnings on secure websites. If you see secure connection errors on multiple secure websites, updating your security product or modifying its settings may resolve the issue.
Alternatively, you can uninstall third-party security software and use Windows Defender, the built-in antivirus on Windows 8 and Windows 10.
Incorrect system clock
Firefox uses certificates on secure websites to ensure that your information is being sent to the intended recipient and can\'t be read by eavesdroppers. An incorrect system date can cause Firefox to detect that the website\'s security certificate is expired or invalid. Make sure your computer is set to the correct date, time and time zone.
安全连接失败，火狐没有连接
本文解释了为什么您可能会看到安全连接失败或未连接：潜在安全问题错误页面以及您可以做什么。
内容表
无法建立安全连接
当需要安全（https）连接的网站尝试与计算机进行通信时，Firefox 会交叉检查此尝试，以确保网站证书和连接方法实际上是安全的。如果 Firefox 无法建立安全连接，它将显示错误页面。
安全连接失败
安全连接失败错误页面将包括错误说明、向 Mozilla 报告错误的选项和
错误页面还将包括以下信息：
- 由于无法验证收到的数据的真实性，因此无法显示您尝试查看的页面。
- 请联系网站所有者，告知他们这个问题。
未连接：潜在安全问题
某些安全连接故障将导致未连接：潜在安全问题错误页面。
错误页面将包括潜在安全威胁的描述、向 Mozilla 报告错误的选项以及查看错误代码和其他技术详细信息
网站问题
TLS 版本不受支持
一些网站尝试使用过时的（不再安全的）传输层安全（TLS）机制，试图保护您的连接。如果在安全建立连接时出现问题，Firefox 会通过阻止导航到此类站点来保护您。联系网站所有者，要求他们将其 TLS 版本更新为仍然当前且仍然安全的版本。
从 Firefox 版本 74 开始，默认情况下允许的最低 TLS 版本为 TLS 1.2。不支持 TLS 版本 1.2 或以上的网站将显示带有错误代码的安全连接失败错误页面：SSL_ERROR_UNSUPPORTED_VERSION 以及此网站可能不支持 TLS 1.2 协议的消息，这是 Firefox 支持的最低版本。错误页面可能还包括一个按钮，
需要 HSTS
其他网站可能需要 HTTP 严格的运输安全 （HSTS），并且不允许使用不安全的连接访问。
安全软件冲突
许多安全产品使用默认情况下拦截安全连接的功能。这可以在安全网站上产生连接错误或警告。如果您在多个安全网站上看到安全连接错误，更新您的安全产品或修改其设置可能会解决问题。
或者，您可以卸载第三方安全软件并使用 Windows Defender，即 Windows 8 和 Windows 10 上的内置防病毒软件。
系统时钟不正确
Firefox 在安全网站上使用证书，以确保您的信息被发送到预期的收件人，并且窃听者无法读取。不正确的系统日期可能导致 Firefox 检测网站的安全证书已过期或无效。确保您的计算机设置为正确的日期、时间和时区。