Prerequisites The only prerequisite is having a Ubuntu 14.04 Droplet established and running. You will need root access to complete this guide. Optional: After completion of this tutorial, It would be a good idea to create a standard user account wit
How to set up an FTP server on Ubuntu 14.04 Setting up a fully-functional and highly secure FTP server on Ubuntu is made very easy with a handful of key components and a couple minutes of your time. From anonymous FTP access, root directory restricti
Port Knocking for Ubuntu 14.04 Server OS:ubuntu 14.04 server 原理简单分析: 端口敲门服务,即:knockd服务.该服务通过动态的添加iptables规则来隐藏系统开启的服务,使用自定义的一系列序列号来“敲门”,使系统开启需要访问的服务端口,才能对外访问.不使用时,再使用自定义的序列号来“关门”,将端口关闭,不对外监听.进一步提升了服务和系统的安全性. 1.安装knockd #apt-get install update #apt-ge