Как исправить ошибку ssl_error_bad_mac_alert в firefox?

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Some websites try using outdated (no longer secure) Transport Layer Security (TLS) mechanisms in an attempt to secure your connection.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 78, 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, Enable TLS 1.0 and 1.1 that will allow you to override the minimum TLS requirement; however, Mozilla plans to remove this option and permanently disable TLS 1.0 and 1.1 in a future version of Firefox. For more information, see this Mozilla page.

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Some websites try using outdated (no longer secure) Transport Layer Security (TLS) mechanisms in an attempt to secure your connection.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 78, 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, Enable TLS 1.0 and 1.1 that will allow you to override the minimum TLS requirement; however, Mozilla plans to remove this option and permanently disable TLS 1.0 and 1.1 in a future version of Firefox. For more information, see this Mozilla page.

HSTS required

Other websites may require (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. See for help with specific security products that can produce these errors, such as Avast, AVG and ESET software.

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. For more information, see How to troubleshoot time related errors on secure websites.

Other secure connection issues

To troubleshoot other secure connection issues not described above, see:

Certificate Pinning ReportsError code: MOZILLA_PKIX_ERROR_KEY_PINNING_FAILURE

Certificate contains the same serial number as another certificateError code: SEC_ERROR_REUSED_ISSUER_AND_SERIAL

Причина 1

Если вы открыли браузер Mozilla Firefox и при загрузке страницы увидели сообщение «Ошибка при установлении защищенного соединения» первым делом нужно понять, что вызвало данную ошибку, в данном случае будет рассмотрена ошибка с кодом: SEC_ERROR_OCSP_FUTURE_RESPONSE. Данный код сообщает нам о том, что дата и время, установленное на сайте, не совпадает с датой и временем, установленным на вашем компьютере. Это легко проверить, взглянув на настройки вашей даты и времени, они отображаются в правом нижнем углу экрана. Если вы убедились в несоответствии вашего времени с реальным, тогда необходимо настроить их вручную или же сделать это автоматически. Для этого нажимаем правой кнопкой мыши по времени и в выпавшем меню выбираем пункт «Настройка даты и времени» (способ для Windows 8/10). Если вы используете Windows XP/Vista/7 тогда в выпавшем меню выбираем «Настройки даты/времени». После того как открылись «Настройки даты и времени» активируем опцию «Установить время автоматически» и смотрим измениться ли время на актуальное.

Если время не изменилось убираем «Автоматическую настройку» и нажимаем кнопку «Изменить», в открывшемся окне настраиваем время и дату вручную. Для Windows XP/Vista/7 в открывшемся окне настроек переходим во вкладку «Время интернета» и ставим галку «Выполнять синхронизацию с сервером времени в Интернете», нажимаем «Обновить сейчас».

Проверяем обновленное время, если ничего не изменилось, тогда переходим во вкладку «Дата и время» и настраиваем все вручную. После того как мы настроили дату и время перезагружаем браузер и открываем нужный вам сайт, все должно работать.

Если же и после настройки времени «Ошибка при установлении защищенного соединения» в браузере Mozilla Firefox не исчезла, тогда скорее всего файл cert8.db поврежден.



Что бы решить проблему с поврежденным файлом, необходимо что бы браузер создал его заново, для этого нужно удалить этот файл.

Что бы открыть папку с этим файлом открываем меню в браузере Mozilla Firefox и выбираем пункт «Справка». Далее в открывшемся меню открываем пункт «Информация для решения проблем». Откроется страница, в которой необходимо открыть папку профиля, нажимаем «Открыть папку». В открывшейся папке находим файл с именем «cert8», выделяем его и удаляем. После удаления перезагружаем браузер. Теперь все должно работать.

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 78, 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, Enable TLS 1.0 and 1.1 that will allow you to override the minimum TLS requirement; however, Mozilla plans to remove this option and permanently disable TLS 1.0 and 1.1 in a future version of Firefox. For more information, see this Mozilla page.

HSTS required

Other websites may require (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. See for help with specific security products that can produce these errors, such as Avast, AVG and ESET software.

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. For more information, see How to troubleshoot time related errors on secure websites.

Other secure connection issues

To troubleshoot other secure connection issues not described above, see:

Certificate Pinning ReportsError code: MOZILLA_PKIX_ERROR_KEY_PINNING_FAILURE

Certificate contains the same serial number as another certificateError code: SEC_ERROR_REUSED_ISSUER_AND_SERIAL

HSTS required

Other websites may require (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. See for help with specific security products that can produce these errors, such as Avast, AVG and ESET software.

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. For more information, see How to troubleshoot time related errors on secure websites.

Other secure connection issues

To troubleshoot other secure connection issues not described

Что бы решить проблему с поврежденным файлом, необходимо что бы браузер создал его заново, для этого нужно удалить этот файл.


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 78, 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, Enable TLS 1.0 and 1.1 that will allow you to override the minimum TLS requirement; however, Mozilla plans to remove this option and permanently disable TLS 1.0 and 1.1 in a future version of Firefox. For more information, see this Mozilla page.

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 78, 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, Enable TLS 1.0 and 1.1 that will allow you to override the minimum TLS requirement; however, Mozilla plans to remove this option and permanently disable TLS 1.0 and 1.1 in a future version of Firefox. For more information, see this Mozilla page.

HSTS required

Other websites may require (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. See for help with specific security products that can produce these errors, such as Avast, AVG and ESET software.

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. For more information, see How to troubleshoot time related errors on secure websites.

Other secure connection issues

To troubleshoot other secure connection issues not described above, see:

Certificate Pinning ReportsError code: MOZILLA_PKIX_ERROR_KEY_PINNING_FAILURE

Certificate contains the same serial number as another certificateError code: SEC_ERROR_REUSED_ISSUER_AND_SERIAL

Причина 1

Если вы открыли браузер Mozilla Firefox и при загрузке страницы увидели сообщение «Ошибка при установлении защищенного соединения» первым делом нужно понять, что вызвало данную ошибку, в данном случае будет рассмотрена ошибка с кодом: SEC_ERROR_OCSP_FUTURE_RESPONSE. Данный код сообщает нам о том, что дата и время, установленное на сайте, не совпадает с датой и временем, установленным на вашем компьютере. Это легко проверить, взглянув на настройки вашей даты и времени, они отображаются в правом нижнем углу экрана. Если вы убедились в несоответствии вашего времени с реальным, тогда необходимо настроить их вручную или же сделать это автоматически. Для этого нажимаем правой кнопкой мыши по времени и в выпавшем меню выбираем пункт «Настройка даты и времени» (способ для Windows 8/10). Если вы используете Windows XP/Vista/7 тогда в выпавшем меню выбираем «Настройки даты/времени». После того как открылись «Настройки даты и времени» активируем опцию «Установить время автоматически» и смотрим измениться ли время на актуальное.

Если время не изменилось убираем «Автоматическую настройку» и нажимаем кнопку «Изменить», в открывшемся окне настраиваем время и дату вручную. Для Windows XP/Vista/7 в открывшемся окне настроек переходим во вкладку «Время интернета» и ставим галку «Выполнять синхронизацию с сервером времени в Интернете», нажимаем «Обновить сейчас».

Проверяем обновленное время, если ничего не изменилось, тогда переходим во вкладку «Дата и время» и настраиваем все вручную. После того как мы настроили дату и время перезагружаем браузер и открываем нужный вам сайт, все должно работать.

Если же и после настройки времени «Ошибка при установлении защищенного соединения» в браузере Mozilla Firefox не исчезла, тогда скорее всего файл cert8.db поврежден.

Что бы решить проблему с поврежденным файлом, необходимо что бы браузер создал его заново, для этого нужно удалить этот файл.

Что бы открыть папку с этим файлом открываем меню в браузере Mozilla Firefox и выбираем пункт «Справка». Далее в открывшемся меню открываем пункт «Информация для решения проблем». Откроется страница, в которой необходимо открыть папку профиля, нажимаем «Открыть папку». В открывшейся папке находим файл с именем «cert8», выделяем его и удаляем. После удаления перезагружаем браузер. Теперь все должно работать.

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 78, 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, Enable TLS 1.0 and 1.1 that will allow you to override the minimum TLS requirement; however, Mozilla plans to remove this option and permanently disable TLS 1.0 and 1.1 in a future version of Firefox. For more information, see this Mozilla page.

HSTS required

Other websites may require (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. See for help with specific security products that can produce these errors, such as Avast, AVG and ESET software.

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. For more information, see How to troubleshoot time related errors on secure websites.

Other secure connection issues

To troubleshoot other secure connection issues not described above, see:

Certificate Pinning ReportsError code: MOZILLA_PKIX_ERROR_KEY_PINNING_FAILURE

Certificate contains the same serial number as another certificateError code: SEC_ERROR_REUSED_ISSUER_AND_SERIAL

HSTS required

Other websites may require (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. See for help with specific security products that can produce these errors, such as Avast, AVG and ESET software.

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. For more information, see How to troubleshoot time related errors on secure websites.

Other secure connection issues

To troubleshoot other secure connection issues not described above, see:

Certificate Pinning ReportsError code: MOZILLA_PKIX_ERROR_KEY_PINNING_FAILURE

Certificate contains the same serial number as another certificateError code: SEC_ERROR_REUSED_ISSUER_AND_SERIAL


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