Got slow portscans on CTF’s?

Aaaaaargh, my port scan take forever to complete! Heard that one before? You should have, it is a common complaint often heard between CTF rookies. Today we are looking into some ways to mitigate slow scans. Nmap When looking at the various complaints, Nmap seem to be the culprit. Gamers bash it for being slow

Notes on making CTF games

Some time ago I wrote a post named “unofficial guide to creating CTF VMs“. Since then I have been approached by random people, students I mentor and colleagues asking how to make that virtual machine vulnerable. Well, I never intended that post to reveal that. It was simply left as an exercise to the readers. Today I

An Unofficial Guide to Creating CTF VMs

Today I am going to shed some light on how to create a virtual machine for CTF gaming. This tutorial came to life after a discussion on my Discord server on how to distribute CTF games among friends. In this tutorial we’ll create a Debian based virtual machine, prep it with some software – then