If you’re wondering which VPN protocol uses UDP port 1701, the answer is L2TP. L2TP is a tunneling protocol that is commonly used with IPSec for encrypting traffic.
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Introduction
The Point-to-Point Tunneling Protocol (PPTP) is a network protocol that creates a secure tunnel between two points. PPTP uses a variety of protocols, including the Internet Protocol (IP), Transport Control Protocol (TCP), and User Datagram Protocol (UDP). PPTP is often used with virtual private networks (VPNs) because it can provide a high level of security. VPNs are often used by businesses to allow employees to connect to the company network from outside the office. They are also used by individuals to protect their privacy when using public Wi-Fi hotspots.
One of the advantages of PPTP is that it can use UDP port 1701. This makes it possible to use PPTP with firewalls that block TCP port 1723. However, UDP port 1701 is not always available, and PPTP can also use TCP port 1723.
L2TP/IPSec
L2TP/IPSec is a protocol that uses UDP port 1701. This protocol can be used to create a VPN tunnel between two computers. L2TP/IPSec is a secure protocol that uses encryption to protect data.
PPTP
Point-to-Point Tunneling Protocol (PPTP) uses UDP port 1701. PPTP uses a TCP control channel and a Generic Routing Encapsulation (GRE) data tunnel to encapsulate Point-to-Point Protocol (PPP) packets.
IKEv2
IKEv2 (Internet Key Exchange version 2) is a VPN protocol that authenticates and encrypts the communication between two devices. IKEv2 is used to set up security associations and key exchanges for IPsec. IKEv2 uses UDP port 500 for IKE traffic and port 4500 for NAT-T traffic.
OpenVPN
OpenVPN uses both the TCP and UDP protocols. By default, OpenVPN uses port 1194 for the UDP connection and port 443 for the TCP connection.
Conclusion
In conclusion, we recommend that you use UDP port 1701 for your VPN connections. We also recommend that you use a public DNS server such as 8.8.8.8 or 8.8.4.4 to improve reliability and speed.