Hi All I have trouble about freeradius+mysql. I configured freeradius(2.1.10) +mysql(5.5.14) and selftest by radtest everything is okay. But when I try external nas client it always returns "null response". the setup as below. PC(client)<===>wireless AP(nas,192.168.21.223)<===>radius server(192.168.21.30) my nas table: mysql> select * from nas; +----+--------------------+---------------------+-------+----------+--------------+----------+---------------+---------------------+ | id | nasname | shortname | type | ports | secret | server | community | description | +----+--------------------+---------------------+-------+----------+--------------+----------+---------------+---------------------+ | 1 | 192.168.21.223 | 192.168.21.223 | other | NULL | testing123 | NULL | NULL | RADIUS Client | | 3 | 127.0.0.1 | localhost | other | NULL | testing123 | NULL | NULL | RADIUS Client | +----+--------------------+---------------------+-------+----------+--------------+-----------+---------------+--------------------+ radcheck table: mysql> select * from radcheck; +----+--------------------+-------------------+----+--------+ | id | username | attribute | op | value | +----+--------------------+-------------------+----+--------+ | 1 | gary | User-Password | := | gary | | 2 | test | User-Password | := | test | | 3 | 001d09cb2715 | User-Password | := | test | +----+--------------------+-------------------+----+--------+ 192.168.21.223 is the wireless AP(nas) and my radius server is 192.168.21.30. I am using wireshark to capture the packets and it shows "destination unreachable(host administratively prohibited)". see screenshot as below. Can anyone help me? Best Regards Gary