Which VPN authentication protocol uses SSL TLS?

What are VPN protocols?

Let’s start with the basics. VPN stands for virtual private network, which is a secure tunnel between two or more devices. When you use a VPN, you are connected to the internet through an intermediary server run by the VPN provider (e.g., ExpressVPN).

The security of your connection is dictated by the VPN protocol, a set of instructions that defines how your device communicates with the VPN server.

How do VPN protocols work?

VPN protocols work in various ways, but they usually perform two basic functions: authentication and encryption. Authentication ensures your device is communicating with a trusted VPN server, and encryption makes the communication itself unreadable to outsiders.

Different encryption standards and authentication methods result in differing levels of speed and security for VPN users. VPN protocols also have differing rules on how to handle potential errors, which affects stability and reliability.

Lightway

Built from the ground up by ExpressVPN, Lightway is created for the modern world, forgoing features that are no longer needed from a VPN and implementing those that provide a smooth, secure experience. Establishing a VPN connection might take only a fraction of a second, depending on your network, and you’ll stay connected to the VPN even when your device switches networks. Lightway does the minimum needed to get you connected quickly and securely, so you might even notice less battery usage.

When it comes to security, Lightway uses wolfSSL, whose well-established cryptography library has been extensively vetted by third parties, including against the FIPS 140-2 standard. We’ve published the source code of Lightway on GitHub under an open-source license, ensuring transparency to our users.

In addition to running on the UDP protocol, Lightway also supports TCP, which can be slower than UDP but connects better on certain networks. This allows Lightway to be used in a wide range of scenarios.

Verdict: Always try Lightway first

Layer 2 Tunneling Protocol (L2TP)

A significant step up from pioneering but outdated protocols like PPTP and SSTP, the Layer 2 Tunneling Protocol delivers better security at the cost of reduced speed. L2TP is commonly paired with the IPsec protocol to deliver AES-256 encryption, with the combination of the two referred to as L2TP/IPsec.

What is the IPsec VPN protocol?

IPsec stands for Internet Protocol security, a flexible VPN protocol that authenticates and encrypts each individual IP packet. It is often combined with protocols like L2TP that do not offer encryption by themselves.

L2TP/IPsec is more suited for anonymization than for security, as there are other protocols, such as OpenVPN, offering even stronger levels of security.

Verdict: Nice to have

OpenVPN (TCP vs. UDP)

OpenVPN is a highly configurable open-source protocol. It’s available freely for all platforms and is held in high regard by the community, and it is widely adopted among consumer VPN services.

OpenVPN can most easily be configured to mask itself as ordinary internet traffic, which helps it evade detection by filters and firewalls. It has been widely audited by trusted independent researchers, making it appropriate for deployment even in sensitive environments.

In the ExpressVPN apps, users can toggle between UDP (User Datagram Protocol) or TCP (Transmission Control Protocol) within the app settings if they wish.

What is the difference between UDP and TCP?

Simply put, UDP prioritizes fast data transfer at the expense of reliability, while TCP prioritizes reliability over speed. Moreover, TCP is a connection-oriented protocol, requiring a connection to be established before data is exchanged, whereas UDP is a connectionless protocol, which can result in data packets being lost in transmission or arriving out of sequence.

Verdict: One of the best

Internet Key Exchange Version 2 (IKEv2)

IKEv2 is one of the newest protocols and has significant strengths, particularly its speed. It’s well-suited for mobile devices across all platforms.

However, being primarily used in corporate environments, IKEv2 doesn’t have native support for Linux, and its lack of configurability can be a drawback. IKEv2 is also difficult to audit due to its strict licensing. ExpressVPN uses an open-source implementation of IKEv2 to ensure the integrity of the protocol.

IKEv2 is a popular choice, and it will sometimes be used by ExpressVPN apps when the protocol is set to “Automatic.”

Verdict: A solid choice, especially on mobile

Point to Point Tunneling Protocol (PPTP)

As one of the earliest entrants into the world of protocols, PPTP has a rich and storied history. It’s been around since the days of Windows 95 but relies on the outdated MS-CHAP v2 authentication suite, which means it’s easy to crack.

This inherent vulnerability does come with an advantage: The lack of encryption and authentication features means PPTP is the fastest VPN protocol. This also means that the contents of your connection can be seen by your ISP, your Wi-Fi operator, and government surveillance organizations like the NSA.

As such, we recommend that only people who know what they’re doing use PPTP, which is no longer supported on ExpressVPN apps.

WireGuard

WireGuard® is a free and open-source VPN protocol originally written by Jason A. Donenfeld and currently under development by Edge Security LLC. It has shown promise as a modern VPN protocol in terms of speed and its lighter codebase, and a number of VPN providers have begun adopting it in the past couple of years.

ExpressVPN currently does not support WireGuard.

Secure Socket Tunneling Protocol (SSTP)

The SSTP VPN protocol was solely developed by Microsoft and introduced along with Windows Vista. It is very similar to a PPTP tunnel wrapped in SSL, an early encryption protocol popular with securing web pages. As such, SSTP initially worked only on Windows devices, and it never gained popularity beyond that.

SSTP has limited configurability and does not stand out among available protocols.

ExpressVPN no longer supports SSTP.

What is the best VPN protocol?

Find out which VPN protocol you should use

If you’re looking for the trifecta of speed, security, and reliability, Lightway delivers on all fronts thanks to its lightweight codebase. It runs fast, uses less battery, and is easy to audit and maintain—meaning better security. 

Lightway is generally the best VPN protocol for everything from gaming to IPTV, and other applications where speed and connection stability are crucial.

If Lightway isn’t available to you, OpenVPN or IKEv2 remain your go-to protocols. OpenVPN offers 256-bit AES encryption with best-in-class security algorithms, giving you extensive cloaking abilities and an impenetrable layer protecting your digital footprint. The codebase has been publicly audited and checked for bugs, implementation errors, and backdoors.

Mobile users will also be well-served by IKEv2, which offers similar speed, reliability, and security to OpenVPN.

What is the fastest VPN protocol?

Given different environments, internet speeds, or network configurations, different VPN protocols will perform better. Lightway is one of the fastest protocols available, alongside OpenVPN and IKEv2. Without its layer of encryption, PPTP could be called the fastest VPN protocol. However, we don’t recommend you use PPTP, and the protocol is not available on any ExpressVPN apps.

What is the most secure VPN protocol?

Lightway, IKEv2, L2TP, and OpenVPN are all secure protocols, but the title of the most secure VPN protocol should go to Lightway, which uses wolfSSL, a well-established cryptography library that is FIPS 140-2 validated—which means it has been rigorously vetted by third parties. Lightway core code has been audited and open-sourced so that it can be transparently and widely scrutinized for security vulnerabilities.

OpenVPN is also recommended, because it has been extensively audited by multiple neutral experts. Its open-source implementations are available for anyone to inspect and improve.

Which VPN protocol is the most stable?

Designed to deal with frequent network changes, Lightway is the most stable VPN protocol. Users experience fewer connection drops, especially on mobile, and stay connected even when the device switches networks. With Lightway, your VPN session persists even when your network connection drops unexpectedly, so once you’re back online, your VPN is, too.

What is the easiest VPN protocol to set up?

Protocols don’t need to be set up within a VPN app—you are using a VPN protocol when you turn on the VPN app. If you’re looking for ease of use, leave your VPN protocol set to “Automatic” and ExpressVPN will choose the best option for your network—which is usually Lightway.

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