Configure VOS3000 unauthorized SIP response with SS_REPLY_UNAUTHORIZED. Control whether VOS3000 responds to unknown SIP sources silently or with 403/401.
VOS3000 Authentication Suspend: Powerful Brute-Force Lockout Protection
VOS3000 authentication suspend prevents brute-force attacks by locking accounts after repeated failed SIP registration attempts. Configure SS_ENDPOINTREGISTERSUSPEND and related parameters.