PPTP

TCP

VPN High Risk

Point-to-Point Tunneling Protocol — legacy VPN, broken encryption, MS-CHAPv2 weakness

🔍 How to Scan Port 1723

nmap -sV -p 1723 target

nmap -sV -sC --script=banner -p 1723 target

nc -zv target 1723

Scan port 1723 with nmap -sV to identify the exact service and version
If PPTP is not needed, close or firewall this port immediately
Check for default credentials if a management interface runs on this port
Use searchsploit pptp to find known exploits
Monitor traffic on port 1723 with Wireshark or tcpdump for anomalies
Ensure the service is patched to the latest version to prevent known CVE exploitation

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