i forget the script. My script was like this:

Create TRIGGER [LOGON_TRIGGER]

ON ALL SERVER WITH EXECUTE AS 'sa'

FOR LOGON

AS

BEGIN

SET NOCOUNT ON

SET ANSI_NULLS ON

SET QUOTED_IDENTIFIER ON

IF ORIGINAL_LOGIN()= 'odbc' AND

CONNECTIONPROPERTY('client_net_address') not in (select client_net_address from net_address_pool)

rollback

END