Some DOS/DDOS protection
April 16, 2012install ntop on centos 5 with whm/cpanel environment
June 19, 2012in /usr/local/apache/conf/includes/post_virtualhost_global.conf add
LogFormat "%{X-Forwarded-For}i %h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined