Common SSL Installation Errors and Solutions

1. Modulus Mismatch Error:

   • Firefox error code: ssl_error_rx_record_too_long
   • Description: The certificate's modulus does not match the expected value.
   • Solution: Ensure the certificate was generated with the correct modulus (e.g., 2048 or 4096 bits).

2. Certificate Authority (CA) Validation Issues:

   • The server may fail to validate the CA due to an expired or incorrect certificate.
   • Solution: Verify the CA's validity and revocation status in your SSL configuration.

3. Private Key Missing or Incorrect:

   • The private key associated with the certificate is missing or mismatched.
   • Solution: Reinstall the certificate and ensure the private key is securely stored.

4. Intermediate Certificate Issues:

   • An intermediate certificate may be missing or invalid, causing SSL handshake failures.
   • Solution: Ensure all intermediate certificates are properly chained and installed on your server.

5. Apache SSL Configuration Errors:

   • Error: "AH02094: Command line: '-D', argument: 'SSL' — you should not use this because the module is built-in"
   • Solution: Verify that mod_ssl is enabled and that the SSL module is correctly configured in Apache's configuration files.

6. Nginx SSL Error:

   • Error: "nginx: [error] SSL: no shared cipher error=... "
   • Solution: Check if both the server and client have compatible SSL/TLS versions and ciphers. Update to the latest TLS version (e.g., TLS 1.2 or higher).

7. Tomcat SSL Configuration:

   • Error: "java.io.IOException: SSL handshake failed"
   • Solution: Ensure that the Tomcat SSL connector is correctly configured with valid certificates and keystores, and that the protocol version matches (e.g., TLS 1.1 or TLS 1.2).

8. IIS SSL Error:

   • Error: "The SSL handshake failed, because the server did not present a certificate that the client recognized"
   • Solution: Verify that the IIS SSL settings are correctly configured with valid certificates and that the hostname matches the certificate's subject.

9. Plesk SSL Installation:

   • Error: "Failed to generate SSL private key"
   • Solution: Reinstall the SSL module in Plesk and attempt reinstallation of the certificate.

Support and Additional Resources:

• For further assistance, contact Esadax's support team via Live Chat.
• Reference the official Mozilla SSL/TLS documentation for troubleshooting guidance.