带你深入了解Access数据库的4种安全方式
一、密码式 给数据库起一个随机复杂的名称,避免被猜到被下载,这种方式在以前很流行,因为大家都对自己的代码很有自信。但随着错误提示对数据库地址的泄露导致数据库被非法下载,这种方式也就越来越少人用了。 二、#式 在数据库名称里加上#号,从URL上请求
一、密码式
给数据库起一个随机复杂的名称,避免被猜到被下载,这种方式在以前很流行,因为大家都对自己的代码很有自信。但随着错误提示对数据库地址的泄露导致数据库被非法下载,这种方式也就越来越少人用了。
二、"#"式
在数据库名称里加上#号,从URL上请求时#是请求地址和请求参数的一个分隔字符,如果知道了数据库名,直接请求的话,如:#.mdb,WEB服务器会认为请求的是access而不是access#.mdb,所以会提示找不到文件,但是很遗憾,URL中对于这些特殊的字符都会有一个特殊的表示方式,#的特殊表示就是%23,如%23.mdb,那么access#.mdb将会被下载。还有如果用FlashGet之类的下载工具也可以直接下载。
三、asp式
这种作法是比较专业但也是很安全的也是现在比较流行的作法,,但是现在许多的人只是作了一半,只是将数据名改成ASP而以,这样的话直接用FlashGet之类的下载工具一样可以将数据库下载,这种方式的正确作法:
在数据库内创建一个字段,名称随意,类型是OLE对象,内容设置为单字节型的"
这段代码运行完之后将会在数据库内生成一个nodownload表,表内字段是notdown。如果数据库内已有同名的数据表存在请将代码内的nodownload改成自己想要的数据表名即可。
四、asa式
这种方式的真谛是利用IIS对ASA文件的保护,从而使得数据库文件不能从URL上直接请求下载,但是这种方式被误解成只要将文件后缀改成ASA就可以了。要知道IIS只是对global.asa这个文件名有请求保护,所以这种方式只能将数据库名设置为global.asa,而且要注意的是,设置成global.asa之后最好不要将其放在主机或虚拟目录的根目录里,不然会被IIS当然正常的global.asa文件进行尝试运行的

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