Import Vulnerable Machine

Now that we have OPNsense installed and setup it is time to import a vulnerable machine from vulnhub. I will be using DC 1 from DCAU as it is a beginner machine.

First download the machine:

DC: 1

Once downloaded open a terminal and extract the DC-1.zip with unzip DC-1.zip

You should now have a DC-1 folder with a DC-1.ova file. We will import this into virtualbox.

Importing DC-1

In VirtualBox Manager click File > Import Appliance...

Click the Folder icon to the right of File and select the DC-1.ova file in the Downloads directory.

Click Finish

Once DC-1 is imported we need to make a change in the network secton.

Click Network under Audio:

And Change "Attached to:" to Internal Network. Then Change Name: to Cyber-Isolated.

Click OK and start the machine.

Once the machine is booted up we can check for an IP address one of two ways.

First Method:

In Kali we can do a No port scan with nmap. Simply open a terminal and type

nmap -sn 10.6.6.1/24

This will scan our entire isolated network for live host.

We now know that DC-1 IP address is 10.6.6.11 and we can start hacking this machine.

Second Method:

In OPNsense Click Services > DHCPv4 > Leases. Here we can also see DC-1 at 10.6.6.11.

To learn how to exploit this machine check out my write up!

This concludes Setting up OPNsense in VirtualBox. Enjoy your hacking journey!