Как исправить ошибку err ssl version or cipher mismatch

Если вы столкнулись с ошибкой ERR_SSL_VERSION_OR_CIPHER_MISMATCH, мы понимаем, в каком состоянии вы сейчас находитесь. Вы расстроены, Вам любопытно, и Вы немного злитесь. Когда клиенты стали спрашивать о сообщении ERR_SSL_VERSION_OR_CIPHER_MISMATCH, эксперты по SSL всерьез занялись этим вопросом и нашли некоторые решения.

Изучая анатомию этой ошибки, обнаружили, что устаревшее у Google и Mozilla шифрования RC4 вызывает данную ошибку. Итак, придумали четыре возможных решения, чтобы уничтожить ошибку из ваших систем. Прежде чем перейти к исправлениям, обратите внимание на следующие вещи:

1. Если одно решение не работает, попробуйте следующее;
2. Некоторые из этих решений не совсем безопасны, поскольку они предусматривают использование более старых, небезопасных протоколов.

Давайте начнем!

Решение 1. Включите все версии SSL / TLS

Примечание. Этот шаг включает старые, небезопасные протоколов. Если вас это не пугает, вы можете им воспользоваться на свой страх и риск.

1. Открыть Chrome;
2. Нажмите на три точки, которые вы видите в верхнем правом углу;
3. Теперь перейдите в Настройки и найдите «прокси» в поле поиска;
4. Вы должны увидеть опцию Open proxy settings, нажмите на нее;
5. Перейдите на вкладку «Дополнительно»;
6. Теперь отметьте все версии SSL и TLS;
7. Нажмите кнопку «Применить»;
8. Перезапустите Chrome.

Хоть мы предлагаем это, как возможное решение, мы не можем подчеркнуть, что это безопасно. Старые версии TLS и особенно SSL известны уязвимостями. На данный момент вы действительно не должны подключаться ни к чему, кроме TLS 1.2.

Решение 2. Отключите защиту Интернета в антивирусе / брандмауэре

Мы не можем дать вам пошаговые инструкции для этого, поскольку они будут отличаться для каждого антивируса / брандмауэра. Вероятно, Вы найдете то, что ищете на web-сайте поставщика. Как и в первом шаге, здесь также нужно включить все версии SSL и TLS.

Решение 3: Отключить протокол QUIC

1. Поиск chrome: // flags / # enable-quic в адресной строке;
2. Отключение по протоколу Experimental QUIC protocol;
3. Перезапустите Chrome.

Решение 4. Очистите состояние SSL

1. Откройте Chrome;
2. Нажмите на три точки, которые вы видите в правом верхнем углу;
3. Теперь нажмите «Настройки»;
4. Теперь перейдите в Настройки и найдите «прокси» в поле поиска;
5. Вы должны увидеть опцию Open proxy settings, нажмите на нее;
6. Перейдите на вкладку «Содержимое»;
7. Нажмите «Очистить состояние SSL»;
8. Перезапустить Chrome.

Мы очень надеемся, что одно из этих четырех решений помогло вам устранить ошибку ERR_SSL_VERSION_OR_CIPHER_MISMATCH. Если нет, поделитесь своими проблемами вместе с проблемным URL-адресом, и мы постараемся Вам помочь.

When you visit a website running over HTTPS a series of steps are performed between the browser and the web server to ensure the certificate and SSL/TLS connection is valid.

Some of these include the TLS handshake, the certificate being checked against the certificate authority, and decryption of the certificate.

What Is the ERR_SSL_VERSION_OR_CIPHER_MISMATCH Error?

If for some reason the browser doesn’t like what it sees, such as a misconfiguration or unsupported version, your browser might display the following error: “ERR_SSL_VERSION_OR_CIPHER_MISMATCH” which prevents you from accessing the site.

Check out a few recommendations on how to fix this error.

What Causes the ERR_SSL_VERSION_OR_CIPHER_MISMATCH Error?

The ERR_SSL_VERSION_OR_CIPHER_MISMATCH error typically happens on older operating systems or browsers.

But that is not always the case. In fact, we just recently encountered a user having this issue on their WordPress site who was migrating to Kinsta from another host. We were, of course, running the latest version of Chrome, so the issue was with their SSL certificate. Chrome is actually protecting you by not letting you load it.

You might also see a variation of the error, such as:

• Error 113 (net::err_ssl_version_or_cipher_mismatch): unknown error
• The client and server don’t support a common SSL protocol version or cipher suite

Check out reasons below on why this happens and what you can do about it.

• Check Your SSL Certificate
• Check for Certificate Name Mismatch
• Check for Old TLS version
• Check RC4 Cipher Suite
• Clear SSL State In Chrome
• Use a New Operating System
• Temporary Disable Antivirus

Check Your SSL Certificate

If you see this error, the first and easiest place to start is to perform an SSL check on the certificate that is installed on the site. We recommend using the free SSL check tool from Qualys SSL Labs. It is very reliable and we use it for all Kinsta clients when verifying certificates. Simply input your domain into the Hostname field and click on “Submit.”

Check Out Our Video Guide to Fixing SSL Errors

You can also select the option to hide public results if you prefer. It could take a minute or two to scan your site’s SSL/TLS configuration on your web server.

Check for Certificate Name Mismatch

In this particular instance, the customer migrating to Kinsta had a certificate name mismatch which was throwing up the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error. As you can see from the SSL Labs test below, this is pretty quick and easy to diagnose. As SSL Labs states, a mismatch can be a number of things such as:

• The site does not use SSL, but shares an IP address with some other site that does.
• The site no longer exists, yet the domain still points to the old IP address, where some other site is now hosted.
• The site uses a content delivery network (CDN) that doesn’t support SSL.
• The domain name alias is for a website whose name is different, but the alias was not included in the certificate.

Another easy way to check the current domain name issue on the certificate is to open up Chrome DevTools on the site. Right-click anywhere on the website and click on “Inspect.” Then click on the security tab and click on “View certificate.” The issued domain will show in the certificate information. If this doesn’t match the current site you’re on, this is a problem.

Remember though, there are wildcard certificates and other variations, but for a typical site, it should match exactly. However, in our case, the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error actually prevented us from being able to check it in Chrome DevTools. That is where a tool like SSL Labs can come in handy.

Check for Old TLS version

Another possible reason is that the TLS version running on the web server is old. Ideally, it should be running at least TLS 1.2 (better yet, TLS 1.3). If you are a Kinsta customer you never have to worry about this as we always upgrade our servers to the latest and greatest supported versions. Kinsta supports TLS 1.3 on all of our servers and our Kinsta CDN. Cloudflare also enables TLS 1.3 by default.

(Suggested reading: if you’re using legacy TLS versions, you might want to fix ERR_SSL_OBSOLETE_VERSION Notifications in Chrome).

This is something the SSL Labs tool can also help with. Under configuration, it will show you the current version of TLS running on the server with that certificate. If it is old, reach out to your host and ask them to update their TLS version.

Check RC4 Cipher Suite

Another reason according to Google’s documentation for ERR_SSL_VERSION_OR_CIPHER_MISMATCH is that the RC4 cipher suite was removed in Chrome version 48. This is not very common, but it could happen in say larger enterprise deployments that require RC4. Why? Because everything usually takes longer to upgrade and update in bigger and more complex configurations.

Security researchers, Google, and Microsoft recommend that RC4 be disabled. So you should make sure the server configuration is enabled with a different cipher suite. You can view the current cipher suite in the SSL Labs tool (as seen below).

Clear the SSL State In Chrome

Another thing to try is clearing the SSL state in Chrome. Just like clearing your browser’s cache this can sometimes help if things get out of sync. To clear the SSL state in Chrome on Windows, follow these steps:

• Click the Google Chrome – Settings icon (Settings) icon, and then click Settings.
• Click Show advanced settings.
• Under Network, click Change proxy settings. The Internet Properties dialog box appears.
• Click the Content tab.
• Click “Clear SSL state”, and then click OK.
• Restart Chrome.

If you are on a Mac, see these instructions on how to delete an SSL certificate.

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Use a New Operating System

Older operating systems fall out of date with newer technologies such as TLS 1.3 and the latest cipher suites as browsers stop supporting them. Specific components in the latest SSL certs will simply stop working. Google Chrome, in fact, pulled the plug on Windows XP back in 2015. We always recommend upgrading to newer operating systems if possible, such as Windows 10 or the latest version of Mac OS X.

Temporary Disable Antivirus

The last thing we recommend trying if you are still seeing the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error is to ensure you don’t have an antivirus program running. Or try temporarily disabling it. Some antivirus programs create a layer between your browser and the web with their own certificates. This can sometimes cause issues.

Introduction

The error ERR_SSL_VERSION_OR_CIPHER_MISMATCH occurs when a user’s browser cannot establish a secure connection with a web server that uses HTTPS and SSL. The issue may lie in the server configuration or locally on a user’s computer.

Follow the easy solutions  in this guide to fix the ERR_SSL_VERSION_OR_CIPHER_MISMATCH error.

Solutions for Website Developers

As a developer or a webmaster, you might get a report that a user encountered this error when trying to access your website. The error may also appear in your Apache error logs.

The err_ssl_version_or_cipher_mismatch error usually occurs when there’s a problem with the SSL certificate or encryption modules. There are a few server-side actions you can take to resolve this issue.

Verify SSL Status of Website

Use a tool like the free Qualys SSL Labs Server Test. The tool examines the state of your certificates and encryption and generates a report.

This is a great place to start since the tool tests several different areas at once. If you have errors, the report highlights the sections that need attention.

Another way to check the SSL certificate status is to navigate to your website and click the padlock in the search bar.

On Google Chrome, it looks like this:

This method should be used only for a quick reference. We recommend using a dedicated tool, such as the Qualys SSL Labs tool we mentioned.

Check for Certificate Name Not Matching

An SSL certificate proves that your website is who it claims to be. The website name and the name on the certificate must match. Additionally, the certificate must come from a trusted provider.

There are a few reasons the names might not match, which can generate the error ERR_SSL_VERSION_OR_CIPHER_MISMATCH:

• When the domain does not use SSL, but another domain with the same IP address uses SSL.
• The domain points to an old IP address it no longer uses. The old website doesn’t exist, but another website has the first domain’s old IP address.
• The site uses a CDN (Content Delivery Network) that does not support SSL.
• The site has a domain name alias that is not in the certificate.

Once you determine the source of the problem, you can resolve the issue easily.

Verify TLS Version

TLS stands for Transport Layer Security and is a security protocol that’s used to encrypt communications between websites. The current version (at the time this article was written) is TLS 1.3. If your site is running an older version of TLS, it may cause the CIPHER_MISMATCH error.

Most modern browsers are set to use the latest version of TLS (if available on the website). If your server is not configured to use TLS 1.3, consider updating to the latest protocol.

Verify RC4 Cipher Suite

RC4 Cipher is an old and simple tool for encrypting traffic. It has been found to have significant vulnerabilities.

Some organizations still use RC4 for legacy applications, but most modern browsers do not support it. If a website is configured to use RC4, an error may occur.

The best solution is to move the site from RC4 to TLS 1.3 protocols. If you cannot completely disable RC4, add the TLS 1.3 protocol so that modern browsers don’t trigger the err_ssl_version_or_cipher_mismatch error.

Manually Inspect Security Certificate

To manually inspect your SSL Certificate, open the browser, load your webpage, and follow these steps:

In Firefox:

• Right-click anywhere on the page.
• Click View Page Info.
• Select the Security tab.
• Click View Certificate.

In Chrome:

• Right-click anywhere on the page.
• Click Inspect.
• In the Inspection pane near the top, click the arrows >> to reveal more options.
• Click Security.
• Click View Certificate.

In Safari:

• Double-click the padlock icon in the upper-right section.
• In the window that appears, click Show Certificate > Details.

If the site you are checking is not secure and has no certificate, there will be no option to view the certificate.

Solutions for End Users

The err_ssl_version_or_cipher_mismatch error can appear due to a client-side issue. The reason can be an older version of operating systems or an outdated browser. Current versions of TLS protocols are incompatible with old browsers and operating systems.

To bypass the mismatch error, try the solutions we list below.

Connect with a Different Computer

The easiest method to check if only your computer has the issue loading a website is to try using a different computer. The safest bet is to try from a machine with a recent version of an operating system.

If you can load the website without getting the error, you can proceed with troubleshooting using the suggestions in this guide.

Delete Cache and Cookies on Your Browser

Clearing your browser’s cache and cookies can help with SSL certificate issues. Depending on the browser and the version you are using, the steps to find the section for clearing cache may be different.

The CTRL+SHIFT+DELETE hotkey combination works for most browsers. When the pop up for clearing history or cache appears, change the timeframe to All or Everything. If you check all the options, you will lose saved logins and all history, so you can uncheck those options if you want to.

Enable TLS 1.3 Version on Old Browsers

Recent versions of web browsers use TLS 1.3 by default. If you did not update your browser or do not want to, you can check the TLS version and enable 1.3.

In Firefox:

Open a new tab and type about:config in the address bar. Click the button to accept the risk and then type security.tls in the search bar.

Look for the security.tls.version.max option towards the bottom of the list. Set the value to 4 if it is not already set.

In Chrome:

Open a new tab and type chrome://flags in the address bar. Search for TLS using the search bar at the top. The results will include the TLS 1.3 downgrade hardening options.

Disable QUIC Protocol

Chrome has many security settings, and “Experimental QUIC Protocol” can be the cause of the err_ssl_version_or_cipher_mismatch error.

To disable the QUIC protocol in Chrome:

In the address bar type in chrome://flags. In the search bar at the top, enter QUIC. The search results should list “Experimental QUIC protocol.”

Change from Default to Disabled, restart Chrome, and try loading the website again.

Clear the SSL State on your Computer.

To clear the SSL state on your computer, go directly to the “Internet Properties” section. The quickest way in Windows 10 is to search for “Internet Properties” or “Internet Options” from the Start menu.

Navigate to the Content tab and click Clear SSL state.

The pop-up message “The SSL cache was successfully cleared” appears.

Some older versions of Chrome allow you to access Internet Properties and clear SSL state from the advanced settings menu.

Update or Change your Web Browser

Most modern browsers update automatically on restart. If your browser did not update automatically, you could manually update it.

To check the version on most popular browsers, navigate to the Help and About section.

In most cases, you can manually update the browser from here. Once the update completes, try loading the website again.

Conclusion

This guide listed the most common solutions for the err_ssl_version_or_cipher_mismatch error. The causes may be on the server side or the client side.

By following the steps listed in this guide, you should be able to find the cause of the error and fix it.