Poptop is an open source VPN server supporting Microsoft’s PPTP (Point-to-Point Tunneling Protocol). It allows you to use a Linux Server as a VPN Server for Windows machines. This way you can encrypt any communication between the Linux server and your Windows workstation easily. You can use NAT (Network Address Translation) to hide your workstation’s IP address when you access the internet thru the VPN Server. Windows comes with a built-in and easy-to-configure VPN client. Nothing has to be installed on the Windows machine. In this post, I would like to share my recent experience installing Poptop.

(more…)

Marius Ducea discussed three ways how to block brute force attacks under Linux using iptables, PAM and fail2ban. All three posts are quite detailed and well written.

(more…)