Asp.net 防止模拟Http请求

前一段时间做了模拟Http请求，那么我们应该怎么做可以阻止用户模拟Http请求了，在这里推荐一个方法：就是访问时间差和访问次数。我们把数据访问的IP存放到数据库，以便我们以后查看。
首先建立数据表和存储过程
CREATE TABLE [dbo].[IPAccess](
    [IP] [varchar](50) COLLATE Chinese_PRC_CI_AS NOT NULL,
    [Times] [bigint] NULL,
    [State] [bit] NULL,
    [LastDataTime] [datetime] NULL,
 CONSTRAINT [PK_IPAccess] PRIMARY KEY CLUSTERED
(
    [IP] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
CREATE PROC GetIpState
    (
      @IP VARCHAR(50) ,
      @TimeCount INT ,
      @State BIT OUTPUT
    )
AS
    BEGIN
        DECLARE @count BIGINT
        SELECT  @count = COUNT(0)
        from    dbo.IPAccess
        WHERE   IP = @IP
        IF ( @count IS NULL
             OR @count = 0
           )
            BEGIN
                SET @State = 1 ;
                INSERT  dbo.IPAccess
                        ( IP, Times, State, LastDataTime )
                VALUES  ( @IP, 1, -- Times - bigint