Hi,
I followed this:
https://www.digitalocean.com/community/articles/how-to-install-linux-nginx-mysql-php-lemp-stack-on-centos-6
//
Starting nginx: [ OK ]
//
ps -ef | grep nginx:
root 1739 1714 0 09:40 pts/0 00:00:00 vi
/etc/yum.repos/nginx.repo
nginx 24053 24052 0 11:28 ? 00:00:00 php-fpm: pool www
nginx 24054 24052 0 11:28 ? 00:00:00 php-fpm: pool www
nginx 24055 24052 0 11:28 ? 00:00:00 php-fpm: pool www
nginx 24056 24052 0 11:28 ? 00:00:00 php-fpm: pool www
nginx 24057 24052 0 11:28 ? 00:00:00 php-fpm: pool www
root 24093 1 0 11:34 ? 00:00:00 nginx: master process
/usr/sbin/nginx -c /etc/nginx/nginx.conf
nginx 24095 24093 0 11:34 ? 00:00:00 nginx: worker process
nginx 24096 24093 0 11:34 ? 00:00:00 nginx: worker process
nginx 24097 24093 0 11:34 ? 00:00:00 nginx: worker process
nginx 24098 24093 0 11:34 ? 00:00:00 nginx: worker process
root 24105 23964 0 11:36 pts/2 00:00:00 grep nginx
//
I can ping the server but I can’t reach the server through the IP.
If someone can help me, it would be great ! 
www.conf: http://pastebin.com/7HmPUwS2
default.conf: http://pastebin.com/7Gpjf3rc
nginx.conf: http://pastebin.com/Hq6be91p
Posted at Nginx Forum:
http://forum.nginx.org/read.php?2,236896,236896#msg-236896