可单独放置在某个页面或独立成一个文件进行调用

<%
        '受屏蔽IP地址(段)集合，星号为通配符，通常保存于配置文件中。
        Const BadIPGroup = "94.142.131.20|124.225.74.51|192.168.0.*|59.26.284.*"

        If IsForbidIP(BadIPGroup) = True Then
        Response.Write(GetIP &"系统已记录您的ＩＰ地址信息")
  Response.Write("<BR>")
        Response.Write("由于您在本站发布大量垃圾信息！管理员已禁止您访问站点。")
  Response.Write("<BR>")
        Response.Write("需要开通请联系")
        Response.End()
        End If

        '参数vBadIP：要屏蔽的IP段,IP地址集合，用|符号分隔多个IP地址(段)
        '返回Bool：True用户IP在被屏蔽范围，False 反之

        Function IsForbidIP(vBadIP)
        Dim counter, arrIPPart, arrBadIP, arrBadIPPart, i, j
    
       arrBadIP = Split(vBadIP, "|")    
       arrIPPart = Split(GetIP(), ".")
   
       For i = 0 To UBound(arrBadIP)         
      counter = 0
      arrBadIPPart = Split(arrBadIP(i), ".")        
      For j = 0 To UBound(arrIPPart)             
     If(arrBadIPPart(j)) = "*" or Cstr(arrIPPart(j)) = Cstr(arrBadIPPart(j)) Then            
     counter = counter + 1            
             End If            
         Next        
         If counter = 4 Then            
             IsForbidIP = True
             Exit Function
         End If        
     Next
     IsForbidIP = False
     End Function

''返回客户IP地址

        Function GetIP()
       Dim IP
     IP = Request.ServerVariables("HTTP_X_FORWARDED_FOR")
    If IP = "" Then IP = Request.ServerVariables("REMOTE_ADDR")
    GetIP = IP
   End Function
   %>