VirtualBox VM Setup Guide

Add Oracle’s GPG key and repository:

sudo apt update
sudo apt install -y gnupg wget
wget -q https://www.virtualbox.org/download/oracle_vbox_2016.asc -O- | sudo apt-key add -
echo "deb [arch=amd64] https://download.virtualbox.org/virtualbox/debian $(lsb_release -cs) contrib" | sudo tee /etc/apt/sources.list.d/virtualbox.list

b. Install VirtualBox:

sudo apt update
sudo apt install virtualbox-7.0

Check installation:

virtualbox

---

2. Download Lubuntu 16.04 ISO

• Official archived ISO:
  https://cdimage.ubuntu.com/lubuntu/releases/16.04/release/

3. Create a Virtual Machine in VirtualBox

a. Launch VirtualBox, Click "New" and configure:

---

4. Network Settings

Two main options depending on your use case.

a. NAT (Default – For Internet Access)

• Go to Settings > Network

• Adapter 1: Attached to NAT

• This allows the VM to access the internet through your host system

b. Detached Mode (for GNS3 or Host-only networking)

• Go to Settings > Network

• Adapter 1: Attached to Bridged Adapter or Host-only Adapter

• Bridged: VM will get IP from the same network as the host (works for GNS3)

• Host-only: Useful for isolated lab setups without internet

Optional: Add a second adapter for dual-networking

• Adapter 2: Enable and attach to Host-only Adapter or Internal Network as needed for GNS3 or lab designs

---

5. Post-Installation

After first login:

• Update packages:

sudo apt update && sudo apt upgrade -y

• Install openssh-server (for remote access):

sudo apt install openssh-server

• Check SSH service status:

sudo systemctl status ssh

You should see active (running). If not, start and enable it:

sudo systemctl enable ssh
sudo systemctl start ssh

Check listening port (default is 22):

ss -tlnp | grep ssh

Optional: Adjust firewall to allow SSH (if UFW is enabled):

sudo ufw allow ssh
sudo ufw enable

Test SSH Access from Another PC:

ssh yourusername@<ip-of-vm>

---

c. Install and Configure ProFTPD (FTP Server)

• Install ProFTPD:

sudo apt install proftpd

• During installation, choose standalone mode and press Enter.

• Edit ProFTPD configuration:

sudo nano /etc/proftpd/proftpd.conf

Make the required changes or confirmations to the file:

• Add /bin/false to valid login shells:

echo "/bin/false" | sudo tee -a /etc/shells

• Create an FTP user (with restricted shell):

sudo useradd -d /var/ftp -s /bin/false ftpuser
sudo passwd ftpuser

• Create the FTP directory and set ownership:

sudo mkdir -p /var/ftp
sudo chown ftpuser:ftpuser /var/ftp
sudo chmod 755 /var/ftp

• Restart the FTP service:

sudo systemctl restart proftpd

• Test FTP Access from a Client:

ftp <ip-of-vm>

Use ftpuser and the password you set. Try uploading or downloading a file.