Ignoring request from unknown client

[sales]

Hi   I am running radiusd in debugging mode radiusd -fxxyz -p 1812   Returns these results: (ip's *'d out) rad_recv: Access-Request packet from host ***.**.16.64:4610, id=0, length=61 Ignoring request from unknown client ***.**.16.64:4610   Any suggestions? Need more info?