Which VPN Protocol Uses UDP Port 1701?

Do you know which VPN protocol uses UDP port 1701? If you’re not sure, you’re not alone. In this blog post, we’ll explain which VPN protocol uses this port, and why.

Which VPN Protocol Uses UDP Port 1701? Checkout this video:

Introduction

VPN protocols are the set of instructions that govern how data is encrypted and transported over a VPN connection. There are several different VPN protocols in use today, each with its own advantages and disadvantages. One of the most popular VPN protocols is L2TP/IPsec, which uses UDP port 1701. This protocol is frequently used in conjunction with IPSec for added security.

The Different Types of VPN Protocols

There are a few different types of VPN protocols that can be used. The most common are PPTP, L2TP/IPsec, and OpenVPN. PPTP is the oldest and most compatible with the widest range of devices. L2TP/IPsec is more secure than PPTP but can be slower. OpenVPN is the most secure option but can be more complicated to set up.

Internet Protocol Security (IPSec)

Internet Protocol Security (IPSec) is a protocol suite that authenticates and encrypts the packets of data sent over an internet protocol network. IPSec is often used in virtual private networks (VPNs) to protect traffic on public or shared networks.

The IPSec protocol uses two types of security methods: authentication and encryption. Authentication verifies the identity of the sender of a message, while encryption scrambles the message so that it can only be read by the intended recipient.

IPSec can be used with either the Internet Protocol (IP) or the Address Resolution Protocol (ARP). When used with IP, IPSec is known as AH (Authentication Header) + ESP (Encapsulating Security Payload). When used with ARP, it is known as ESP only.

ESP uses UDP port 500, while AH uses UDP port 4500.

Layer 2 Tunneling Protocol (L2TP)

Layer 2 Tunneling Protocol (L2TP) is a tunneling protocol used to support virtual private networks (VPNs). It is a combination of the Point-to-Point Tunneling Protocol (PPP) and Layer 2 Forwarding (L2F), which makes it more secure than PPTP. L2TP uses UDP port 1701.

Point-to-Point Tunneling Protocol (PPTP)

Point-to-Point Tunneling Protocol (PPTP) is a method for implementing virtual private networks. PPTP uses a control channel over an IP network (the Internet) to establish secure connections for data exchange. PPTP tunnels individual data streams within the overall traffic stream using GRE (Generic Routing Encapsulation). PPTP is available on most platforms, including all versions of Windows. To use a PPTP VPN, you’ll need to set up a PPTP server. Your VPN client will connect to the server to access resources on the network.

VPN Protocols:
-OpenVPN
-WireGuard
-IKEv2/IPSec
-L2TP/IPSec

Secure Socket Tunneling Protocol (SSTP)

SSTP is a type of VPN protocol that uses the SSL/TLS protocol to provide a secure connection. It is one of the most secure VPN protocols and is commonly used by large organizations that need to provide a high level of security for their data.

SSTP uses port 443, which is the same port that is used for HTTPS traffic. This makes it very difficult for firewalls to block SSTP traffic.

SSTP is not supported on all VPN servers, so you may need to check with your VPN provider to see if they support this protocol.

OpenVPN

OpenVPN is an open-source software application that implements virtual private network (VPN) techniques to create secure point-to-point or site-to-site connections in routed or bridged configurations and remote access facilities. It uses a custom security protocol[9] that utilizes SSL/TLS for key exchange. It is capable of traversing network address translators (NATs) and firewalls. It was written by James Yonan and is published under the GNU General Public License (GPL).

OpenVPN has been ported to multiple platforms, including Linux, Windows, macOS, iOS, Android, BSD, Solaris,[10] and more.[11][12][13] A number of vendors provide remote-access VPN capabilities as part of their products. The Open VPN project includes a Windows[14] client.

OpenVPN uses a custom security protocol[9] that utilizes SSL/TLS for key exchange. It is capable of traversing network address translators (NATs) and firewalls.[15] OpenVPN supports non-encrypted TCP/UDP tunnels on all operating systems.[16][17][18]

OpenVPN allows client connections via TCP or UDP.[19] Default ports are TCP 80 and UDP 1194,[20][21] but other ports such as 443, 992, 8443 can be used instead.[22][23] OpenVPN can run over User Datagram Protocol (UDP) or Transmission Control Protocol (TCP) transports, multiplexing created SSL tunnels on a single TCP/UDP port[24][25] (RFC 3948 for UDP).[26] This is useful for environments where firewall restrictions prevent UDP traffic from being passed.[27][28][29] OpenVPN can use Transport Layer Security (TLS) to secure the control channel with AES 256-bit encryption with 2048-bit Diffie–Hellman key exchange concluded with SHA256 message authentication code.[30��31 Other ciphers such as AES 128-bit may be used but are not recommended due to padding oracle attacks,[32��33��34��35 needing Perfect Forward Secrecy in the Diffie–Hellman Exchange to mitigate them.[36��37

A common home router configuration allows remote access from the Internet by default but many home users block this feature because they do not understand it or because they fear it will give outside people too much access to their personal lives. If this feature is not turned off by the user most routers will allow anyone on the Internet to connect to the VPN server built into the router.[citation needed] This would allow an attacker who compromises the router’s Internet connection to have direct access to all the devices on the local network which are behind the router’s firewall. Turning off this feature does not affect other functionality of the router such as general Internet connectivity or DHCP server operation. People who understand what this feature does and who have a need for outside access will usually leave it turned on while those who do not need outside access will usually turn it off.[citation needed��