403   Forbidden问题?

403   Forbidden问题?

直接输入http://127.0.0.1/
出现:
403   Forbidden
You   don 't   have   permission   to   access   /   on   this   server.
如果输入http://127.0.0.1/文件名,就能访问
网上找了说是   权限不够,怎么修改权限呢?最好具体点,越详细越好!
补充说下服务器:Apache+php
设置下DirectoryIndex
#
#   This   should   be   changed   to   whatever   you   set   DocumentRoot   to.
#
AllowOverride   all