Set up VPN Server - Synology DSM Help

What is a VPN Port? - Definition from Techopedia The number and type of VPN ports utilized depends on the protocol used. For example, the PPTP protocol uses TCP port number 1723 to create a connection to IP port 47 Generic Routing Encapsulation (GRE) for packet encapsulation. Port 1723 (tcp/udp) :: SpeedGuide PPTP is also vulnerable to bit-flipping attacks, i.e. an attacker can modify PPTP packets without possibility of detection. OpenVPN with AES encryption is a much more secure choice. See also: port 500/udp (IPSec IKE) port 1701/tcp (L2TP) port 1194/udp (OpenVPN) QNAP NAS uses port 1723/TCP for PPTP VPN. How can I open PPTP traffic to a PPTP server behind the The Point-to-Point Tunneling Protocol (PPTP) is a method for implementing virtual private networks. PPTP uses a control channel over TCP and a GRE tunnel operating to encapsulate PPP packets. A PPTP tunnel is instantiated by communication to the peer on TCP port 1723. This TCP connection is then used to initiate and manage a second GRE tunnel

Oct 20, 2016

DiskStation Manager - Knowledge Base | Synology Inc.

Sep 28, 2013

Avast SecureLine Firewall Ports Mar 27, 2013 PPTP – Wikipedie