Port 1723: PPTP
Port 1723 is PPTP, an early Microsoft VPN protocol. Its encryption has been broken for years, so it should not be used where real security matters; modern deployments use OpenVPN, WireGuard, or IPsec instead.
TCPRemote accessUnencrypted by defaultIANA assigned
| Port number | 1723 |
|---|---|
| Service | Point-to-Point Tunneling Protocol |
| Protocol | TCP |
| Category | Remote access |
| Default encryption | No |
Security note. Port 1723 is not encrypted by default. Restrict it to trusted networks, or use an encrypted alternative where one exists, to avoid exposing credentials and data in transit.
Frequently asked questions
What is port 1723 used for?
Port 1723 is PPTP, an early Microsoft VPN protocol. Its encryption has been broken for years, so it should not be used where real security matters; modern deployments use OpenVPN, WireGuard, or IPsec instead.
Is port 1723 TCP or UDP?
Port 1723 (PPTP) uses TCP.
Is port 1723 secure?
Port 1723 is not encrypted by default. Where possible, use an encrypted alternative or tunnel it over TLS or a VPN.
Should I open port 1723 on my firewall?
Only if you specifically need PPTP. Expose it to the smallest set of trusted sources, and never open database or Windows-service ports to the whole internet.