📌 Task

From your host at 10.0.0.1, connect to the remote host at 10.0.0.2 on port 31337, and send the message: Hello, World!

You’re instructed to use netcat (nc). Unlike before, this time you must send a message to receive the flag.

🧠 Understanding the Setup

  • You’re communicating with a TCP server that expects input from the client.
  • Netcat allows you to send input directly via typing or piping.
  • Once the message is sent (by pressing Enter), the server will respond with a flag.

💡 Netcat will appear to hang after sending; press Ctrl-C to quit once the flag is received.

🔍 How We Interact

Steps:

  1. Use nc 10.0.0.2 31337 to connect.
  2. Type Hello, World! and press Enter to send.
  3. The server replies with the flag.
  4. Press Ctrl-C to exit the session.

🧪 Final Commands

root@ip-10-0-0-1:~# nc 10.0.0.2 31337
Hello, World!
pwn.college{MH6peE0k7_KJk4VdkeopEh9NfZ0.0VNyAjNxwSM0IzMyEzW}
^C
root@ip-10-0-0-1:~#

Output

pwn.college{MH6peE0k7_KJk4VdkeopEh9NfZ0.0VNyAjNxwSM0IzMyEzW}

Flag

pwn.college{MH6peE0k7_KJk4VdkeopEh9NfZ0.0VNyAjNxwSM0IzMyEzW}