Vpn-jantit-pptp

Open the file in Wireshark. Filter the traffic using pptp or gre (Generic Routing Encapsulation). You will see the control channel setup (TCP port 1723) followed by GRE packets carrying the encapsulated PPP data.

The challenge provides a PCAP file containing traffic from a PPTP VPN connection. PPTP is an older VPN protocol known for security vulnerabilities, particularly in its authentication phase, which often uses MS-CHAPv2. Step-by-Step Analysis vpn-jantit-pptp

: The 24-byte hashed response sent by the client. Open the file in Wireshark

To crack the password, you need to extract the following fields from the "Response" packet: particularly in its authentication phase

: The client sends its username and a hashed response (NT-Response). Success/Failure : Confirms if the credentials were correct.