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Some websites try using outdated (no longer secure) Transport Layer Security(TLS) mechanisms in an attempt to secure your connection.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.
安全連接失敗，火狐沒有連接
本文解釋了為什么您可能會看到安全連接失敗或未連接：潛在安全問題錯誤頁面以及您可以做什么。
內容表
無法建立安全連接
當需要安全（https）連接的網站嘗試與計算機進行通信時，Firefox 會交叉檢查此嘗試，以確保網站證書和連接方法實際上是安全的。如果 Firefox 無法建立安全連接，它將顯示錯誤頁面。
安全連接失敗
安全連接失敗錯誤頁面將包括錯誤說明、向 Mozilla 報告錯誤的選項和
錯誤頁面還將包括以下信息：
- 由於無法驗證收到的數據的真實性，因此無法顯示您嘗試查看的頁面。
- 請聯系網站所有者，告知他們這個問題。
未連接：潛在安全問題
某些安全連接故障將導致未連接：潛在安全問題錯誤頁面。
錯誤頁面將包括潛在安全威脅的描述、向 Mozilla 報告錯誤的選項以及查看錯誤代碼和其他技術詳細信息
網站問題
TLS 版本不受支持
一些網站嘗試使用過時的（不再安全的）傳輸層安全（TLS）機制，試圖保護您的連接。如果在安全建立連接時出現問題，Firefox 會通過阻止導航到此類站點來保護您。聯系網站所有者，要求他們將其 TLS 版本更新為仍然當前且仍然安全的版本。
從 Firefox 版本 74 開始，默認情況下允許的最低 TLS 版本為 TLS 1.2。不支持 TLS 版本 1.2 或以上的網站將顯示帶有錯誤代碼的安全連接失敗錯誤頁面：SSL_ERROR_UNSUPPORTED_VERSION 以及此網站可能不支持 TLS 1.2 協議的消息，這是 Firefox 支持的最低版本。錯誤頁面可能還包括一個按鈕，
需要 HSTS
其他網站可能需要 HTTP 嚴格的運輸安全 （HSTS），並且不允許使用不安全的連接訪問。
安全軟件沖突
許多安全產品使用默認情況下攔截安全連接的功能。這可以在安全網站上產生連接錯誤或警告。如果您在多個安全網站上看到安全連接錯誤，更新您的安全產品或修改其設置可能會解決問題。
或者，您可以卸載第三方安全軟件並使用 Windows Defender，即 Windows 8 和 Windows 10 上的內置防病毒軟件。
系統時鍾不正確
Firefox 在安全網站上使用證書，以確保您的信息被發送到預期的收件人，並且竊聽者無法讀取。不正確的系統日期可能導致 Firefox 檢測網站的安全證書已過期或無效。確保您的計算機設置為正確的日期、時間和時區。