no problem with httpd, but the trend is httpd does not stand alone. There are httpd work with varnish, ... but available in Kloxo-MR is nginx with httpd (nginx-proxy)
#Nginx as frontend and httpd as backend
#nginx focus on file, while httpd focus on proxy
#Thus static file handled by Nginx, while proxy as dynamic request for PHP will be handled by httpd
((httpd: resource issue))
((nginx: compatibility issue))
conclusion : nginx-proxy ... is easy handling (compatibity) as httpd // powerfull and efficient resource as nginx
....php-fpm = quite secure and can handle high traffic