Github-VPS

📜 Description

GitHub Codespaces allows developers and hackers to create and utilize their coding environments directly from GitHub in the cloud. As a CTF player or pentester, you can also leverage GitHub Codespaces similarly to a VPS (Virtual Private Server). This makes it easy to work on projects from anywhere with the flexibility of a portable development setup using Docker.

📚 Table of Contents

📜 Description
🔥 What's Nice
🐳 Installation
🙍🏻‍♂️ Configuration
🚫 Temporarily Disabled
👨🏾‍⚖️ License

🔥 What's Nice

Offers more power with 2-vCPUs, 8GB-RAM, and a temporary 32GB-SSD storage drive.
Higher performance with 4-vCPUs, 16GB-RAM, and a temporary 32GB-SSD storage drive.

🐳 Installation

Note

Github codespace terminal

# pulling images 
$ docker pull docker.io/kalilinux/kali-rolling

# Option 1: Priviliged mode (recommended for ctf players)
$ docker run --privileged -it kalilinux/kali-rolling /bin/bash

# Option 2: Interactive mode
$ docker run --tty --interactive kalilinux/kali-rolling
 
$ apt update && apt install -y kali-linux-default

$ apt update && apt install -y install kali-linux-headless

Installation without errors

Tip

Refer to default installation Guide

Configuration

Starting Docker Kali Image

# Display
$ docker ps -a

# Rename 
$ docker rename <current_name> <new_name>

# Status details 
$ docker inspect <container id>

# Start 
$ docker start <container id> (e.q) d36922fa21e8

# Attach 
$ docker attach <container id>

# Stop  
$ docker stop <container id>

# Remove
$ docker rm <container id>

Adding non-root user

$ sudo apt update && sudo apt upgrade -y

# option 1:
$ adduser l0n3m4n

# option 2:
$ useradd -m -s /bin/bash l0n3m4n

# option 1: replace to your username
l0n3m4n ALL=(ALL:ALL) ALL

# option 2: 
$  echo "l0n3m4n ALL=(ALL) NOPASSWD:ALL" > /etc/sudoers/l0n3m4n

# switching to non-root user
$ su - l0n3m4n

# verify
$ whoami

Diskspace Monitoring

# view ram details
$ free

# view disk space 'du'
$ du -h --max-depth=1 /

# view disk space GB
$ df -h

Docker Privileged

Important

The way to use openvpn or enable tun0 you need to add --privileged option instead using --tty by default, Docker containers do not have access to TUN/TAP devices on the host system due to security and isolation concerns.

# options 1:
$ docker run --privileged -it kalilinux/kali-rolling /bin/bash

# Option 2: Use --device Flag (More Secure)
# A more secure approach is to use the --device flag to explicitly map the TUN/TAP device from the host into the container. This approach is more controlled and limits access to only the necessary device.

$ docker run --device=/dev/net/tun:/dev/net/tun -it kalilinux/kali-rolling /bin/bash

# Verify TUN/TAP Functionality Inside the Container
$ ls -l /dev/net/tun

New Terminal Session