radius x509 authentication + LDAP ?

[Riccardo Veraldi]

Hello,
I am actually using freeradius with EAP-TLS and x509 user certificat 
authentication.

After authentication I would like to chack the common name or email 
address propertires of te certificate againsta LDAP, to authorize the 
user connection.

is it possible to do this ?
I tyed but it seems not working in my configuration.
any hints ?
thank you very much

Riccardo