: The entire authentication exchange (challenges and responses) is sent in the clear, allowing an eavesdropper to capture the data needed for offline cracking.
: Often visible in the PPP configuration or CHAP response. Peer Challenge : The 16-byte random value from the client. vpn-jantit-pptp
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 particularly in its authentication phase