hi, tls: private_key_file = "/etc/raddb/certs/radius-priv-key.pem" tls: certificate_file = "/etc/raddb/certs/radius-priv-cert.pem" tls: CA_file = "/etc/raddb/certs/demoCA/cacert.pem" tls: private_key_password = "mercury" tls: dh_file = "/etc/raddb/certs/dh" tls: random_file = "/etc/raddb/certs/random" tls: fragment_size = 1024 tls: include_length = yes tls: check_crl = no tls: check_cert_cn = "(null)" tls: cipher_list = "(null)" tls: check_cert_issuer = "(null)" rlm_eap_tls: Loading the certificate file as a chain rlm_eap: SSL error error:0200100D:system library:fopen:Permission denied check that all of those files referenced ar readble by the radiusd user and check that the contents are correct(!) alan