ou will need to install the CA certificates in order for your webserver to use your SSL certificate properly. Apache users do not neded to install these certificates individually. Instead you can install the CA certificates using a 'bundle' method.
In the Virtual Host settings for your site, in the httpd.conf file, you will need to complete the following:
Copy the PEM format Bundled CA certificate file (full CA chain) to the directory in which ca-bundled files are stored e.g. /etc/httpd/conf/ssl.crt/
Add the following line to the SSL section of the httpd.conf (assuming /etc/httpd/conf/ssl.crt/ is the directory to where you have copied the CA Bundle file). if the line already exists amend it to read the following:
SSLCACertificateFile /etc/httpd/conf/ssl.crt/cachainpem.txt
If you are using a different location and certificate file names you will need to change the path and filename to reflect your server.
The SSL section of the updated httpd config file should now read something similar to this example (depending on your naming and directories used):
SSLCertificateFile /etc/httpd/conf/ssl.crt/server.crt
SSLCertificateKeyFile /etc/httpd/conf/ssl.key/server.key
SSLCACertificateFile /etc/httpd/conf/ssl.crt/cachainpem.txt
Save your httpd.conf file and restart Apache.