Offensive Security Lab

Introduction After the configuration in previous articles of the lab, we will proceed to its step-by-step resolution. Solution of the environment Now, in order to participate in the resolution of the environment, it will be necessary to deploy a virtual machine with an operating system such as Kali Linux with a network interface connected to the NatNetwork network created earlier with the OpenVPN .ovpn file to connect to the lab network. We connect to the VPN. ...

Introduction With the network infrastructure already defined in OPNsense with the article above, the next step consists of preparing the virtual machines that will form part of the CTF lab. From this point on, each VM must be correctly integrated into the DMZ and internal networks, respecting the previously established segmentation. Installation of the virtual machines We will perform the installation in VirtualBox of two Debian Linux virtual machines with the smallest number of tools installed since the necessary ones will be installed later. To speed up the installation time, the network version of Debian can be used. The requirements for the machines will be 2 CPU cores, 2 GB of RAM, and 8 GB of storage. ...

Introduction The Capture The Flag (CTF) have become one of the most effective methods to learn cybersecurity in a practical way. The possibility of facing real challenges in a controlled environment allows students and professionals to experiment with pentesting techniques without risks. In this article, the design of a multi-user CTF-oriented lab is described, built on Oracle VirtualBox and OPNsense, where each participant has a completely isolated environment from the rest. ...