← Port Encyclopedia
1723
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
🛡️ Security Considerations
- Scan port 1723 with
nmap -sVto 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 pptpto 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