Install and Configure Docker for Ubuntu.

Installation #

Prerequisites #

To install Docker Engine, you need the 64-bit version of one of these Ubuntu versions:

• Ubuntu Hirsute 21.04
• Ubuntu Groovy 20.10
• Ubuntu Focal 20.04 (LTS)
• Ubuntu Bionic 18.04 (LTS)
• Ubuntu Xenial 16.04 (LTS)

Uninstall old versions #

Older versions of Docker were called docker, docker.io, or docker-engine. If these are installed, uninstall them:

sudo apt-get remove docker docker-engine docker.io containerd runc

Set up the repository #

Update the apt package index and install packages to allow apt to use a repository over HTTPS:

Duck DNS is a free dynamic DNS hosted on AWS, that we can use to get a free domain name. There a lot of free Dynamic DNS services, you can find a good comprehensive of them here as well as No-IP that we already have a guide, but Duck DNS is dead simple and has instructions for how to configure on every possible platform or system.

The only negative for this service is the limited subdomains that we can choose from. Because we can only choose a *.duckdns.org subdomain, if for example hobbit.duckdns.org is not available we will have to choose a different subdomain. This is not true for all dynamic DNS services, as we could keep the hobbit subdomain and change the host name to some other free one.

Forensics 1 - user manual #

Challenge Description #

Recently I bought a custom made video game from a totally legit salesman under a dark bridge. There was a user manual alongside, but I can not see the contents of it.

• This challenge has a downloadable part.

Steps #

Unzip challenge files:

unzip forensics_user_manual

We get a file user_manual.docm, which is a word document file with macros.

Hardware 1 - Serial #

Challenge Description #

We managed to eavesdrop on the serial communication of an Arduino-based door locks debugging interface. Can you find the password?

• This challenge has a downloadable part.

Steps #

Unzip challenge files:

unzip hw_serial.zip

We get a file signal.txt, which is the debugging dump of the arduino-based door lock. As we get from the challenge description the file will contain the Serial binary data that we have received from the Arduino. The serial protocol used is UART.

Web 1 - baby JAWTS doo doo doo #

Challenge Description #

There is None like you, There is None like you, And there will never be another JAWTS hunter, Deemed as worthy as you 🎣 …

• This challenge is started on-demand.

Steps #

Brute Force URIs #

The first step was to find any open directories-files:

gobuster -u http://159.65.50.127:30139 -w common.txt

But nothing was found…

Crypto 1 - RSA Leaks #

Challenge Description #

DinoCorp has been experimenting with dinosaurs for years. Their labs are located on an island in the middle of the ocean. We managed to intercept an encrypted message from the head scientist. It looks like something is wrong. Can you decrypt the message?

• This challenge has a downloadable part.

Steps #

Unzip challenge files:

OverTheWire’s wargames are offered to help learn and practice security concepts in the form of fun-filled games.

The Leviathan wargame is a little bit more advanced than Bandit but still doesn’t require any knowledge about programming. It is best to first play Bandit and then Leviathan.

It consists of a total of 6 Levels. At each level, you have to find the password for the next level to continue playing. Each Level is a user that you connect as, using SSH in the leviathan.labs.overthewire.org server.

OverTheWire’s wargames are offered to help learn and practice security concepts in the form of fun-filled games.

The Bandit wargame is aimed at absolute beginners and will teach them the basics needed to be able to play other wargames. All the challenges are focused on the Linux systems and their commands. It aims to get the player familiar with the Linux terminal and introduce some basic security concepts.

It consists of a total of 33 Levels. At each level, you have to find the password for the next level to continue playing. Each Level is a user that you connect as, using SSH in the bandit.labs.overthewire.org server.

OverTheWire’s wargames are offered to help learn and practice security concepts in the form of fun-filled games.

The Bandit wargame is aimed at absolute beginners and will teach them the basics needed to be able to play other wargames. All the challenges are focused on the Linux systems and their commands. It aims to get the player familiar with the Linux terminal and introduce some basic security concepts.

It consists of a total of 33 Levels. At each level, you have to find the password for the next level to continue playing. Each Level is a user that you connect as, using SSH in the bandit.labs.overthewire.org server.

OverTheWire’s wargames are offered to help learn and practice security concepts in the form of fun-filled games.

The Bandit wargame is aimed at absolute beginners and will teach them the basics needed to be able to play other wargames. All the challenges are focused on the Linux systems and their commands. It aims to get the player familiar with the Linux terminal and introduce some basic security concepts.

It consists of a total of 33 Levels. At each level, you have to find the password for the next level to continue playing. Each Level is a user that you connect as, using SSH in the bandit.labs.overthewire.org server.