参考列表
iptables配置实践 http://wsgzao.github.io/post/iptables/#
Linux 基础 —— Linux 防火墙和 iptables http://liaoph.com/iptables/
Linux常用命令及组件：iptables简单应用 http://www.zrblog.net/7027.html
Ubuntu: Stat / Stop / Restart Iptables Firewall Service http://www.cyberciti.biz/faq/ubuntu-start-stop-iptables-service/
How To Set Up a Firewall Using Iptables on Ubuntu 14.04 https://www.digitalocean.com/community/tutorials/how-to-set-up-a-firewall-using-iptables-on-ubuntu-14-04
IPTABLES学习笔记 http://gunner.me/archives/708
其它参考
MongoDB – Allow remote access http://www.mkyong.com/mongodb/mongodb-allow-remote-access/
中文版 mongodb允许远程访问 http://biezhi.github.io/2015/03/03/mongodb-allow-remote-access/