This is a flag parameter. It is used with TLS-based EAP types, such as TLS, TTLS, and PEAP. When set, the default locations are used for loading CA certificates. This is not set by default.

The default CA certificate directory is certs/ in the default OpenSSL directory. Use SSL_CERT_DIR environment variable to override the default location. The default CA certificate file is cert.pm in the default OpenSSL directory. Use SSL_CERT_FILE environment variable to override the default file name.