Observando o log do radius, verifique que em tempos ele dá a seguinte mensagem.
É normal?
Info: rlm_sql (sql): There are no DB handles to use! skipped 0, tried to connect 0
Thu Apr 18 23:15:01 2013 : Info: Exiting normally.
Thu Apr 18 23:15:01 2013 : Info: rlm_sql (sql): Closing sqlsocket 4
Thu Apr 18 23:15:01 2013 : Info: rlm_sql (sql): Closing sqlsocket 3
Thu Apr 18 23:15:01 2013 : Info: rlm_sql (sql): Closing sqlsocket 2
Thu Apr 18 23:15:01 2013 : Info: rlm_sql (sql): Closing sqlsocket 1
Thu Apr 18 23:15:01 2013 : Info: rlm_sql (sql): Closing sqlsocket 0
Thu Apr 18 23:15:01 2013 : Info: rlm_sql (sql): Driver rlm_sql_mysql (module rlm_sql_mysql) loaded and linked
Thu Apr 18 23:15:01 2013 : Info: rlm_sql (sql): Attempting to connect to root@localhost:/mkradius
Thu Apr 18 23:15:01 2013 : Info: rlm_sql (sql): Attempting to connect rlm_sql_mysql #0
Thu Apr 18 23:15:01 2013 : Info: rlm_sql_mysql: Starting connect to MySQL server for #0
Thu Apr 18 23:15:01 2013 : Info: rlm_sql (sql): Connected new DB handle, #0
Thu Apr 18 23:15:01 2013 : Info: rlm_sql (sql): Attempting to connect rlm_sql_mysql #1
Thu Apr 18 23:15:01 2013 : Info: rlm_sql_mysql: Starting connect to MySQL server for #1
Thu Apr 18 23:15:01 2013 : Info: rlm_sql (sql): Connected new DB handle, #1
Thu Apr 18 23:15:01 2013 : Info: rlm_sql (sql): Attempting to connect rlm_sql_mysql #2
Thu Apr 18 23:15:01 2013 : Info: rlm_sql_mysql: Starting connect to MySQL server for #2
Thu Apr 18 23:15:01 2013 : Info: rlm_sql (sql): Connected new DB handle, #2
Thu Apr 18 23:15:01 2013 : Info: rlm_sql (sql): Attempting to connect rlm_sql_mysql #3
Thu Apr 18 23:15:01 2013 : Info: rlm_sql_mysql: Starting connect to MySQL server for #3
Thu Apr 18 23:15:01 2013 : Info: rlm_sql (sql): Connected new DB handle, #3
Thu Apr 18 23:15:01 2013 : Info: rlm_sql (sql): Attempting to connect rlm_sql_mysql #4
Thu Apr 18 23:15:01 2013 : Info: rlm_sql_mysql: Starting connect to MySQL server for #4
Thu Apr 18 23:15:01 2013 : Info: rlm_sql (sql): Connected new DB handle, #4
Thu Apr 18 23:15:01 2013 : Info: Loaded virtual server inner-tunnel
Thu Apr 18 23:15:01 2013 : Info: Loaded virtual server <default>
Thu Apr 18 23:15:01 2013 : Info: Ready to process requests.



Respostas
irei verificar amigo...
Fabio Luiz Oliveira do Nasciment disse:
Pedro,
E que coloquei o ccze.cgi, para ver os log do radius. Ele facilita e muito na hora do suporte.
Talvez fosse interessante você disponibilizar essa ferramenta junto com o MK-Auth.
Pedro Filho disse:
para mim é waning normal do freeradius, não é problema...