VPN & Ασφάλεια

Port 1723

PPTP

PPTP VPN — legacy and cryptographically broken VPN protocol

Port
1723
Protocol
TCP
Service
PPTP
Security
Dangerous
Full name: Point-to-Point Tunneling Protocol

What is port 1723?

PPTP (Point-to-Point Tunneling Protocol) on port 1723 was one of the first VPN protocols, built into Windows since 95/NT. It is now considered cryptographically broken — Microsoft's own research demonstrated serious weaknesses in the MS-CHAPv2 authentication scheme, making it practical to crack. If you are still running a PPTP VPN, migrate immediately to IKEv2, OpenVPN, or WireGuard.

Related ports

Port 500 IKE IPsec VPN key negotiation (IKE / IKEv2)
Port 1194 OpenVPN OpenVPN — widely used open-source VPN protocol
Port 51820 WireGuard WireGuard — modern, fast, and lean VPN protocol
← All ports