BNAME.RU » Код ошибки HTTP 526 Invalid SSL Certificate Cloudflare
Ошибка 526: недействительный сертификат SSL
Ошибка 526 возникает, когда выполняются эти два условия:
Cloudflare не может проверить сертификат SSL на вашем исходном веб-сервере, и
Полный SSL (строгий) SSL устанавливается на вкладке «Обзор» вашего приложения Cloudflare SSL / TLS.
Как устранить ошибку 526 Invalid SSL Certificate?
Для потенциального быстрого исправления установите для SSL значение «Полный» вместо «Полный (строгий)» на вкладке «Обзор» приложения Cloudflare SSL / TLS для домена.
Попросите администратора сервера или поставщика услуг хостинга проверить сертификаты SSL исходного веб-сервера и убедиться, что:
- Сертификат не просрочен
- Сертификат не отозван
- Сертификат подписан центром сертификации (не самоподписанный)
- Запрошенное или целевое доменное имя и имя хоста указаны в общем имени сертификата или альтернативном имени субъекта.
- Ваш исходный веб-сервер принимает соединения через порт SSL порт 443
- Временно приостановите Cloudflare и посетите https://www.sslshopper.com/ssl-checker.html#hostname=www.example.com (замените www.example.com своим именем хоста и доменом), чтобы убедиться, что с исходным SSL нет проблем. сертификат:
Если исходный сервер использует самозаверяющий сертификат, настройте домен на использование полного SSL вместо полного SSL (строгого). См. Рекомендуемые настройки SSL для вашего происхождения.
Cloudflare error 526 triggers when Cloudflare is unable to validate server’s SSL/TLS certificate. It normally happens with Full SSL(Strict) mode in the Cloudflare.
As a part of our Server Management Services, we help our customers to fix similar Cloudflare related errors regularly.
Let us today discuss the possible causes and fixes for this error.
What is Cloudflare error 526?
While we use Cloudflare, it involves two SSL/TLS certificates. One is provided by Cloudflare and the other by the origin server. The First certificate shown in the browser while visiting the website is the Cloudflare one. Origin server’s certificate protects data exchanges between the server and Cloudflare.
The Full (strict) mode SSL option ensures a secure connection between both the visitor – Cloudflare domain and Cloudflare – origin web server connections.
Thus if any of it fail to establish a secure connection, it triggers the 526 error as shown below.
Let us now look at the possible reasons for this error.
What are the causes of Cloudflare error 526?
As we discussed earlier, the error 526 triggers when either the certificate provided by Cloudflare or by the origin server fails to establish a secure connection. This generally happens when:
* Cloudflare cannot validate the SSL certificate at your origin web server
* Full SSL (Strict) SSL is set in the Cloudflare SSL/TLS app.
Let us now look at the steps to fix this error.
How to fix Cloudflare error 526?
Full (strict) mode is the most common reason for the 526 error. A quick fix to solve it would be to change the SSL mode to Full instead of Full (strict) from the Overview tab of Cloudflare SSL/TLS section for the particular domain.
If the issue persists even after changing the SSL mode to Full, then it would be more likely related to the origin web server’s SSL certificates. We need to verify that:
1. The certificate is not expired
2. The certificate is not revoked
3. The certificate is signed by a Certificate Authority such as GlobalSign, Verisign, GeoTrust, Comodo, etc, and is not a self-signed SSL certificate.
4. The requested domain name and hostname are in the certificate’s Common Name or Subject Alternative Name.
5. Origin web server accepts connections over port SSL port 443
6. Temporarily pause Cloudflare and cross-check the certificate with any SSL verification sites like https://www.sslshopper.com to verify that no issues exist with the origin SSL certificate.
If the origin server is using an expired, revoked or self -signed certificate, the next step to fix this error would be to install a proper SSL certificate signed by a Certificate Authority.
Likewise, it is important to have the requested domain name and hostname in the certificate’s Common Name or Subject Alternative Name. If we have added a CNAME for the hostname on Cloudflare, the Common Name or SAN may also match the CNAME target.
Cloudflare can also issue origin certificates to you on request if you don’t want to pay for or acquire one from a third-party. The 526 error should disappear after the installation of a valid certificate on the origin server and the server it accept secure (HTTPS) connections.
[Need any further assistance in fixing Cloudflare errors? – We’re available 24*7]
Conclusion
In short, Cloudflare error 526 occurs when Cloudflare is unable to validate the server’s SSL/TLS certificate. Today, we saw how our Support Engineers fix this error.
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Better Stack Team
Updated on May 4, 2022
Problem
Getting Error 526: Invalid SSL certificate Cloudflare error.
Cause of the problem
Error 526 indicates Cloudflare is unable to successfully validate the SSL
certificate on the origin web server and the SSL setting in the Cloudflare
SSL/TLS app is set to Full SSL (Strict) for the website.
Solution
- If the origin server is configured to use a self-signed certificate, install
a valid certificate on your origin server. To test to see if your origin has
a self-signed certificate, run the following cURL command and replace the
http://example.comwith your domain and123.123.123.123with your origin
IP.
curl -svo /dev/null --resolve example.com:443:123.123.123.123 https://example.com/
The response from an origin server with a self-signed certificate will
contain SSL certificate problem: self signed certificate. A self-signed
certificate secures the connection between Cloudflare and your origin but will
cause a 526 error when you try to connect to the origin directly.
- Check to make sure the certificate hasn’t expired, the certificate isn’t
revoked, and that the certificate is signed by a certificate authority - Check to make sure the requested domain name (hostname) is in the
certificate’s Common Name or Subject Alternative Name (SAN) configuration
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Causes
- Cloudflare cannot validate the SSL certificate at your origin web server
- Full SSL (Strict) SSL is set in the Overview tab of your Cloudflare SSL/TLS app.
Fixes
Step 1: Set SSL To Full
For a potential quick fix, set SSL to Full instead of Full (strict) in the Overview tab of your Cloudflare SSL/TLS app for the domain.
Step 2: Verify SSL Certificates
Request your server administrator or NET Support to review the origin web server’s SSL certificates and verify:
- Certificate is not expired
- Certificate is not revoked
- Certificate is signed by a Certificate Authority (not self-signed)
- The requested domain name and hostname are in the certificate’s Common Name or Subject Alternative Name
- Your origin web server accepts connections over port SSL port 443
- Temporarily pause Cloudflare and visit https://www.sslshopper.com/ssl-checker.html#hostname=www.example.com (replace www.example.com with your hostname and domain) to verify no issues exists with the origin SSL certificate
Step 3: Configure The Domain
If the origin server uses a self-signed certificate, configure the domain to use Full SSL or Flexible instead of Full SSL (Strict).
Ibmi Media has seen our customers seeking our Server support Service in finding a solution to Error 526 Cloudflare error and other Cloudflare related issues occasionally.
In this context, We shall look into the common reasons why such Cloudflare errors happen and how to resolve it.
More about Cloudflare error 526
For Cloudflare to work correctly, it requires that two SSL/TLS certificates is configured properly. Your server has one of the Certificate while the other is for Cloudflare’s server. The Cloudflare’s one servers the browser when your website is accessed. In the other hand, your Server’s Certificate serve helps to encrypt data and provides security of data exchanged between it and Cloudflare.
Also note that Cloudflare facilitates this protection of exchanged data between the Server and Cloudflare by means of the cloudflare’s domain and Cloudflare when strict Full mode SSL is selected.
Therefore, when there is failure to establish a secure connection, an error 526 error will occur.
How can Cloudflare error 526 be resolved?
Selecting Full (strict) function in your Cloudflare account is mostly why you get the 526 error. To resolve this issue for the domain with which this error is affecting, simply select the «FULL» option instead and thus do away with the «FULL (strict)» one.
In the case where the above fix did not work, then it is probably an problem with your server’s SSL certificate. You may want to check if it has expired.
If the certificate has expired, you can renew it and ensure that it is installed properly to enable this error to be fixed.
Do you need to fix Cloudflare errors? Our Server Experts are ready to support you.
Conclusion
In summary, you can see that 526 Cloudflare error is solely an issue with the SSL certificate not validating between your Server and Cloudflare’s server. You can get in touch with us to fix your Server Issues.