Verifique a configuração do apache (httpd) em /etc/httpd/conf/httpd.conf
. Por exemplo, talvez assim (minha configuração do apache no Debian):
<VirtualHost *:80>
ServerName your-server-hostname
ServerAdmin webmaster@localhost
DocumentRoot /var/www
<Directory />
Options FollowSymLinks
AllowOverride None
</Directory>
<Directory /var/www/>
Options Indexes FollowSymLinks MultiViews
AllowOverride None
Order allow,deny
allow from all
</Directory>
</VirtualHost>