Você terá que remover o comentário de algumas linhas para ativar o registro:
-
Da seção
authorize
no arquivo/etc/raddb/sites-enabled/default
:# # If you want to have a log of authentication requests, # un-comment the following line, and the 'detail auth_log' # section, above. # auth_log
-
Da seção
post-auth
no arquivo/etc/raddb/sites-enabled/default
:# # If you want to have a log of authentication replies, # un-comment the following line, and the 'detail reply_log' # section, above. # reply_log