Magnet Weekly CTF writeup - Week 7

This week was a short and easy week as promised, so let's jump right in to the questions!

This week's challenge is split into three parts, but the answers can all be obtained from the networking file /etc/network/interfaces.

Part 1
What is the IP address of the HDFS primary node?

Understanding that 'HDFS primary node' to refer to the HDFS master node, we zoom in to the /etc/network/interfaces file and see its IP.

Answer: 192.168.2.100

Part 2
Is the IP address on HDFS-Primary dynamically or statically assigned?

Referencing the same network file, we see that the interface is configured for static IP address.

Answer: statically

Part 3
What is the interface name name for the primary HDFS node?

Within the same network interface file, we can see the interface name for the primary network interface.

Answer: ens33

Note: There is another interface, ens36 present in the same file which is configured for DHCP. Ideally one should check in the logs to see which of the network interfaces was/were active and their respective IP addresses but for this week's challenge, I simply went with the first likely answer and got lucky.