FreeRADIUS - Google LDAP - Error in debug mode - Regarding

P.Thirunavukkarasu drthiruna at
Sat Oct 9 08:52:21 CEST 2021

Hi all,

The FreeRADIUS server is working fine with eduroam.
But showing the following error message for our local users while
connecting with google ldap in debug mode

*(108) eap_ttls: ERROR: TLS Alert read:fatal:unknown CA(108) eap_ttls:
ERROR: TLS_accept: Failed in error(108) eap_ttls: ERROR: Failed in
__FUNCTION__ (SSL_read)(108) eap_ttls: ERROR: error:14094418:SSL
routines:ssl3_read_bytes:tlsv1 alert unknown ca(108) eap_ttls: ERROR:
error:140940E5:SSL routines:ssl3_read_bytes:ssl handshake failure(108)
eap_ttls: ERROR: System call (I/O) error (-1)(108) eap_ttls: ERROR: TLS
receive handshake failed during operation(108) eap_ttls: ERROR: [eaptls
process] = fail(108) eap: ERROR: Failed continuing EAP TTLS (21) session.
EAP sub-module failed*
Can any of you please help me to resolve this?
Thanks in advance

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