pritunl被墙，所以安装遇到点障碍
基于ubuntu 14.04
https://github.com/pritunl/pritunl
https://github.com/pritunl/pritunl/releases
部分按官方指导

$ vi /etc/apt/sources.list.d/mongodb-org-3.0.list
deb http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/3.0 multiverse
$ apt-key adv --keyserver hkp://keyserver.ubuntu.com --recv 7F0CEB10
$ apt-get update
$ apt-get install openvpn bridge-utils mongodb-org
$ wget https://github.com/pritunl/pritunl/releases/download/1.21.928.27/pritunl_1.21.928.27-0ubuntu1.trusty_all.deb
$ dpkg -i pritunl_1.21.928.27-0ubuntu1.trusty_all.deb
$ service pritunl start

pritunl服务监听443和80端口，通过ip地址打开，默认用户名密码pritunl