ft_ssl_trusted

List of trusted certificates. This sets which Certificate Authority certificates should be trusted as issuers of the client certificates.

ft_ssl_trusted = trusted_certificates

The certificates must be in PEM, DER, or PKCS#7 format. You can either provide the actual certificates, or you can specify a path to a file containing the certificate chain. If using a DER format file, it can contain only a single certificate, not a certificate chain.

See File Names for Certificates and Keys for more information on file types for digital certificates.