Which VPN Protocol Uses UDP Port 1701?

If you’re wondering which VPN protocol uses UDP port 1701, the answer is L2TP/IPsec. This is a popular protocol for VPNs, and it’s often used in conjunction with IPSec for added security.

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VPN protocols are responsible for establishing and maintaining VPN connections. They use various methods to secure the data being transmitted over the VPN connection, and one of these is through the use of UDP port 1701.

So, which VPN protocol uses UDP port 1701? The short answer is: L2TP/IPsec.

L2TP/IPsec is a VPN protocol that uses both UDP port 1701 and 500. It is a very popular VPN protocol, as it offers good security and is relatively easy to set up.

The Different Types of VPN Protocols

If you’re looking to set up a VPN, you’ll need to choose a protocol. There are a few different options available, and they each have their own benefits and drawbacks. In this article, we’ll be discussing the UDP port 1701 protocol.

Internet Protocol Security (IPSec)

IPSec is a VPN protocol that offers increased security and privacy by encrypting traffic at the IP level. This protocol can be used with either the UDP or TCP protocols and is often used in conjunction with other VPN protocols such as L2TP and IKEv2.

Layer 2 Tunneling Protocol (L2TP)

Layer 2 Tunneling Protocol (L2TP) is an extension of the Point-to-Point Tunneling Protocol (PPTP) used by many ISPs and organizations to enable virtual private networking (VPN) connections. L2TP improves VPN security by using Internet Protocol Security (IPSec) encryption for all data that is sent over the tunnel, including control messages. L2TP also uses a stronger password hashing algorithm than PPTP.

L2TP is often used in conjunction with IPSec to secure data communications. IPSec provides confidentiality, integrity, and authentication for L2TP packets. When IPSec is used with L2TP, data is encrypted usingIPSec’s Encapsulating Security Payload (ESP), which provides confidentiality and integrity checking. L2TP/IPSec tunnels can also be authenticated using certificates or a pre-shared key.

L2TP is typically used on top of IPsecencryption protocols such as Authentication Header (AH) or Encapsulating Security Payload (ESP). When used in this manner, L2TP tunnels are sometimes called “L2TP/IPSec tunnels”.

Point-to-Point Tunneling Protocol (PPTP)

Point-to-Point Tunneling Protocol (PPTP) is an older VPN protocol that is supported by a wide range of devices and operating systems. PPTP uses the Generic Routing Encapsulation (GRE) protocol to encapsulate Point-to-Point Protocol (PPP) packets for transmission over an IP network. GRE is often used by ISPs to connect remote locations to their main network. PPTP includes built-in encryption and authentication features and can be configured to use MPPE (Microsoft Point-to-Point Encryption).

Secure Socket Tunneling Protocol (SSTP)

SSTP was developed by Microsoft and introduced with Windows Vista Service Pack 1. Like L2TP/IPsec, SSTP uses SSL to encapsulate and encrypt data traveling between a client and server. However, the big advantage that SSTP has over L2TP/IPsec is that it can circumvent almost all types of firewall and proxy restrictions since it uses TCP port 443 which is typically allowed by most network firewalls.

The downside of SSTP is that it is a propriety VPN protocol developed by Microsoft and is not supported on non-Windows platforms. In addition, since SSTP uses SSL, it is subject to the same security vulnerabilities as SSL.


OpenVPN is a robust and highly flexible VPN daemon. OpenVPN supports SSL/TLS security, ethernet bridging, TCP or UDP tunnel transport through proxies or NAT, support for dynamic IP addresses and DHCP, scalability to hundreds or even thousands of users, and portability to most major OS platforms.

OpenVPN is not a web application proxy and does not operate through a web browser. SSL/TLS provides transport-layer security that allows for the passage of data over an untrusted network without fear of eavesdropping or tampering. The OpenVPN client and server applications are available for download from our website. After installation, OpenVPN can be configured by editing the configuration file(s) directly, or by using one of the many available GUI front-ends.


If you’ve decided that you need a VPN, you’ve probably also decided that you’ll use the PPTP protocol. This is common because it’s built into most versions of Windows and it doesn’t require any extra software. However, PPTP uses TCP port 1723, which can sometimes be blocked by your ISP or network administrator. In this case, you can try using UDP port 1701 instead.

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