Tag Archives: SSL certificate

SSL Errors, What Are They and What Do They Mean?

SSL Certificate

When browsing the internet you may have gotten the occasional popup informing you that the site you want to browse has a security certificate that is not trustworthy; other variants may include: “the security certificate presented by this site is not trusted” or “the security certificate used by this site was not issued by a trusted certificate authority.” These are known as SSL errors (Secure Socket Layer errors). The message you get informing you of the SSL error will vary depending on the browser you are using.

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How to verify if an SSL certificate matches its private key

ssl-certificates

Applicable For Following Parallels Plesk Panel:

* Plesk Panel 11. x for Linux
* Plesk Panel 10. x for Linux
* Plesk Panel 9. x for Linux/Unix

Warning Signs

If you try to upload an SSL certificate in the Plesk control panel and get the following error message:

ERROR message: Unable to set the certificate: Incompatible private key/certificate pair.

Same problem when using .txt format.

Reason
The issue may be caused by the fact that private key and the SSL certificate do not match.

Problem-Solving

To figure out this problem, you need to evaluate the modulus part of the private key and the SSL certificate.

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Apache fails to start: Because of missing SSLCACertificateFile

This tutorial is applicable for:

* Parallels Plesk Panel 11.x for Linux
* Parallels Plesk Panel 10.x for Linux
* Parallels Plesk Panel 9.x for Linux/Unix
* Parallels Plesk Panel 8.x for Linux/Unix

Warning sign

# /etc/init.d/httpd restart
Stopping httpd: [FAILED]
Starting httpd: Syntax error on line 39 of

/var/www/vhosts/domain.tld/conf/13418207440.81148700_httpd.include:
SSLCACertificateFile: file ‘/usr/local/psa/var/certificates/cert-cwJPGJ’ does not exist or is empty
[FAILED]

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