AllowOverride directive

This directive decalres which directives in distributed .htaccess files can override directives from the parent levels (httpd.conf). In context of ISAPI_Rewrite this directive in fact enables or disables .htaccess files for specific virtual host (web site) or directory. Only three values are currently supported: All, None and FileInfo.

All and FileInfo enables .htaccess file and all ISAPI_Rewrite directives in it. None disables all .htaccess files and directives. This directive is inheritable. This means if you specify AllowOverride none for some directory or virtual host .htaccess files will also be disabled for all subdirectories.