Ignoring request from unknown client *.*.*.* 2244

[yao guoxian]

  I have configured FreeRadius to use Mysql.It seemed Mysql works well when
I input "Radiusd -X".
  However when I use NtRadPing to test,I always get the following error:
  rad_recv: Access-Request packet from host 202.117.15.164:2244, id=0,
length=43
Ignoring request from unknown client 202.117.15.164:2244
--- Walking the entire request list ---
  I insert items into the table 'nas' int the 'radius' database like :
+----+----------------+-----------+-------+-------+------------+-----------+---------------+
| id | nasname        | shortname | type  | ports | secret     | community |
description   |
+----+----------------+-----------+-------+-------+------------+-----------+---------------+
|  1 | 202.117.15.164 | liv1      | other |  NULL | testing123 | NULL      |
RADIUS Client |
+----+----------------+-----------+-------+-------+------------+-----------+---------------+
   But it doesn't work.
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