Slide 48 of 115
Notes:
This directive sets the all-in-one file where you can assemble the Certificates of Certification Authorities (CA) whose clients you deal with. These are used for Client Authentication. Such a file is simply the concatenation of the various PEM-encoded Certificate files, in order of preference. This can be used alternatively and/or additionally to SSLCACertificatePath.
SSLCACertificateFile /usr/local/apache/conf/ssl.crt/ca-bundle-client.crt