TryHackMe — Network Fundamentals — Extending Your Network a Walkthrough
This is a step-by-step walkthrough of TryHackMe’s Extending Your Network room, with screenshots.
Task 1: Introduction to Port Forwarding
Question 1: “What is the name of the device that is used to configure port forwarding?”
Per THM: Router
Task 2: Firewalls 101
Question 2: “What layers of the OSI model do firewalls operate at?”
Per THM: Layer3,Layer 4
Question 3: “What category of firewall inspects the entire connection?”
Per THM: Stateful
Question 4: “What category of firewall inspects individual packets?”
Per THM: Stateless
Task 3: Practical — Firewall
Question 5: “What is the flag?”
Step 1: Click “View Site”
This box will pop up in your browser:
Step 2: Click “Start Simulation” and the following screen will come up:
Step 3: Change “Source IP” to 198.51.100.34 and “Destination IP” to 203.0.110.1
Step 4: One, by one, select each Port and click “Add Rule” — do this quickly or the server will go down!
Step 6: Wait a few seconds after adding all the rules and the flag will pop up:
Copy and paste the flag into the answer box:
Task 4: VPN Basics
Question 6: “What VPN technology only encrypts & provides the authentication of data?”
Per THM: PPP
Question 7: “What VPN technology uses the IP framework?”
Per THM: IPSec
Task 5: LAN Networking Devices
Question 8: “What is the verb for the action that a router does?”
Per THM: Routing
Question 9: “What are the two different layers of switches?”
Per THM: Layer2,Layer3
Task 6: Practical — Network Simulator
Question 10: “What is the flag from the network simulator?”
Step 1: Click on “View Site”
The following window will pop in your browser.
Step 2: Change From: to Computer1 and To: to Computer3, packet type is tcp, and “tcppacket” in the Data field. Click “Send Packet”.
You will see activity in the “Network Log” box.
After a few seconds, this box will pop up.
Copy and paste the flag into the answer box.
Question 11: “How many HANDSHAKE entries are there in the Network Log?”
Per THM: 5
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