How to fix the 525 "SSL Handshake Failed" error

The "525 SSL Handshake Failed" error is generated by Cloudflare when it cannot establish a secure SSL connection with your origin server.

Common cause

This error typically occurs when:

• No valid SSL certificate is installed on your origin server, or
• The SSL configuration between Cloudflare and the origin server is incorrect

How to resolve the issue

1. Install an SSL certificate

Make sure your domain has a valid SSL certificate installed in our system.

2. Set the correct SSL mode in Cloudflare

After installing the SSL certificate:

1. Log in to your Cloudflare account
2. Go to your domain settings
3. Navigate to SSL/TLS
4. Set the SSL mode to Full

Do not use “Flexible” if your origin server supports SSL.

3. Avoid premature HTTPS redirects

Do not force HTTP → HTTPS redirects until the SSL certificate is properly installed and working.
Otherwise, Cloudflare may fail to establish a secure connection.