Nginx非80端口访问：如Tomcat、Node.js、Openfire等
原理：Nginx反向代理
# vim /data/server/nginx/conf/vhosts/AppBlog.conf
server {
listen 80;
server_name www.appblog.cn appblog.cn;
location / {
proxy_pass http://127.0.0.1:4000;
}
}
# nginx -s reload
