Thank you for your reply. We are (with the exception of some prototype tests) going to be completely EAP-TLS. Your answer brings me back to my original issue--the CA_path does not exist in the eap.conf file. If I add it, it doesn't seem to work (on 1.1.4). Just adding additional certs to the CA_file seems to work, but I'd prefer to have proper signed (c_reshash) sym-links. That's a useful CRL script, thanks for the link.
CA_path = ${raddbdir}/certs/trustedCAs/
with c_rehash generated fingerprint symlinks for a directory of trusted CA certificates for EAP-TLS (with client authentication by client certificates).
Or
CA_file = ${raddbdir}/certs/trustedCAs.pem
a file with possibly multiple PEM formatted CA certificates for EAP-TLS (with client authentication by client certificates).
My point was that the chain of the radius-server-certificate is actually to be *added* to the file with the radius-server-certificate itself.
And that if you want to do plain EAP- *T* TLS and only EAP-TTLS to be carefull to leave CA_file and CA_path nulled/empty.
I remember that the inline documentation of the eap.conf file suggests to put the CA certificate issuing the radius-servers server-certificate into the CA_file which could open up unwanted EAP-TLS client authentication by client certificates if this CA issued client certificates.
If you configure radiusd to do EAP-TLS also make sure to use the check_crl = yes option and have up-to-date CRLs available in the CA_path. Make sure c_rehash is building the fingerprint symlinks here as well.
To automatically freshen/download CRLs by e.g. cron there is a neat script with some build-in CRL checking etc available at http://dist.eugridpma.info/distribution/util/fetch-crl/
HTH
-- Kind Regards