Do you want to go to Stan`s party?
But you need a flyer.
Everyone wants to come. Most of the flyers have already been taken.
But Dipper promised to get one for you.
Just wait him at …., react to the knock echo request, and he will slip it under the door under discard service
Filtering ICMP packets on the VPN we got:
10.3.0.1 -> 10.3.4.78 | Timestamp request //from the gateway 10.3.4.78 -> 10.3.0.1 | Timestamp reply //our response 10.3.0.1 -> 10.3.4.78 | 51571 -> 9 [SYN] //gateway is trying to connect to port tcp/9
We managed to listen with a simple python script:
#!/usr/bin/python import socket import sys sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) server_address = ('0.0.0.0', 9) sock.bind(server_address) sock.listen(1) while True: connection, client_address = sock.accept() try: while True: data = connection.recv(16) if data: print >>sys.stderr, %s % data.rstrip('\n'), else: break finally: connection.close()
Then running the script:
sudo python server.py
Get the Flag: QYJZYkrdqL7KdBhCNJXNCky1eaV3ZUbMr38ktSwQZi1kW6uI6w9i5A27RUit9JUZ
Flag was QYJZYkrdqL7KdBhCNJXNCky1eaV3ZUbMr38ktSwQZi1kW6uI6w9i5A27RUit9JUZ