Error 525 SSL handshake failed

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This article will focus on Error 525 SSL handshake failed. But first, it is important to say that there are special services to monitor the online status of a site and assess site accessibility.

One of these services is the BAILRY service – a free regular (periodic) website accessibility check. This service also has a paid subscription for constant monitoring of site availability.

525 errors are often caused by a configuration problem on the web server. Error 525 occurs when these two conditions are true:

  1. SSL handshake fails between Cloudflare and web server
  2. Full or Full (Strong) SSL is set in the Overview tab of your Cloudflare SSL/TLS application

Recommendations for fixing error 525

Contact your hosting provider to rule out the following common causes on your web server:

  • A valid SSL certificate is not installed
  • Port 443 (or other custom secure port) is not open
  • No SNI support
  • The ciphers accepted by Cloudflare do not match the ciphers supported by the web server

If 525 errors occur intermittently, review the web server error logs to determine the cause. Configure Apache to log mod_ssl errors. Additionally, nginx includes SSL errors in its standard error log.

Finally, it is important to note that the trust of clients and users in your website, as well as your position in search engines, directly depend on the availability of your resource (website) at any given time.

And you can control this availability using the BAILRY service – a unique software product that has no analogues on the market. To stay informed, sign up for a free regular (periodic) website accessibility check today!