能够识别用户的ip,是否在拒绝访问的ip 列表中。如果在拒绝访问的ip 列表中，则拒绝该用户的请求；如果不在拒绝访问的ip 列表，则向apache返回可以访问的信息。

拒绝访问的ip 列表 可以随时修改，修改后即可生效，而无须重新启动apache-Able to identify the user' s ip, whether or deny access to ip list. If you deny access to ip list, then reject the user' s request , if not deny access to ip list, then returned to the apache access to information. Ip deny access list can be modified, the modified enter into force without the need to restart apache