As of Feb. 6, 2006 Cacti does not work correctly with SELinux.  This will
change in the future.  If you're having issues getting Cacti to work properly
and SELinux is enabled, please run the following commands after installing
Cacti:

chcon -R -t httpd_sys_content_t /var/log/cacti/
chcon -R -t httpd_sys_content_t /var/lib/cacti/rra/