这个要怎么解决啊？

说明: Somedistributions of Apache, especially in Red Hat 7.0, allow an attacker to probea system for user names via requests for user home pages (e.g.,http://host/~username).

修复: Disablingthe UserDir directive in the Apache configuration file (httpd.conf) willprevent this, although it will also prevent users from providing their own webpages. Alternately, specify the same ErrorDocuments for both 403 (Forbidden)and 404 (Page Not Found) responses.

怎么解决？