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  1. Home
  2. Features
  3. Computing
Supported (opens in new tab)

Using a VPN? Find out whether it is leaking data with this set of tools

By Rob Clymo
Contributions from
Jonas P. DeMuro

With absolutely no strings attached

In Association with

ExpressVPN logo (opens in new tab)
Man using desktop PC
(Image credit: Gorodenkoff / Shutterstock)

If you’re keen to beef up the tools in your online privacy arsenal there’s never been a better time to get armed with a Virtual Private Network, or VPN as it’s more commonly referred to. Choosing one of the best VPNs (opens in new tab) can help to keep you safe and secure when you’re online, especially if you spend a lot of time browsing the internet. 

Selecting a popular and reliable brand of VPN not only provides you with a secure and affordable means to securely stay connected to the web, but it can be really easy to configure too. While all VPNs are essentially a variation on the theme, some offer more features than ever and often they can be setup with nothing more than a couple of clicks.

The added value VPN

You’ll generally need to pay a nominal subscription fee to enjoy what the best VPNs have to offer, but it can be money well spent. As an example, if you sign up with ExpressVPN, one of the best-known and hugely popular options out there, you’ll find you get much more than the software itself. 

In fact, ExpressVPN are experts in the Virtual Private Network field and, as a result, have lots of knowledge to share with you if you’re keen to dip a toe further into the world of online privacy. A while ago now, ExpressVPN (opens in new tab) unveiled a suite of free online security tools that allowed consumers to test if their VPN provider was leaking data. 

Leaks occur if a VPN fails at protecting a device's DNS queries (despite the fact that the rest of the traffic is safe behind a VPN). This can result in ISPs or other third parties having access to the consumer's browsing history or app usage, rendering a VPN essentially useless. Today, the demand for tools like this is greater than ever and the good news is ExpressVPN still has plenty of help at hand.

Open source VPN assistance

The tools were originally made available as open source, under the MIT License. At the time, back in 2017, ExpressVPN said they were also the first-ever public tools to enable automatic leak testing. 

Back then, the company explained the tools could cover a wide range of potential leaks, like having an IP address discovered through a WebRTC leak, exposing browsing activity when a user switches between networks, or exposing data in case the VPN software crashes or can't reach the server. Similar issues still exist, which is why what ExpressVPN has been offering over the years remains as pertinent today as it did back then. 

Today, ExpressVPN still has its suite of tools you can use, which are free and open source (opens in new tab). They can be called upon to detect the different types of leaks that can affect VPNs. This includes analysing IP address leaks, IP traffic leaks, DNS leaks and WebTRC leaks, as well as BitTorrent leaks too. What’s more, ExpressVPN offers up the ability to discover leaks that have resulted from unstable network connections along with leaks occurring due to VPN servers being unreachable. It’s a comprehensive box of tricks.

A health check for your VPN

Professor Andrew Jones, Director of the Cyber Security Centre at the University of Hertfordshire, believes such tools are important because of the trust consumers are putting in VPN services. 

"While people are increasingly using the internet in all aspects of their lives, they are also, as a result of the ongoing publicity, becoming more aware of the risks to their privacy. People have reasonably assumed that the use of a VPN was offering some degree of protection to their online privacy, however, this research has shown that there are significant potential weaknesses in a number of the tools that we use and as a result, they are not as well protected as they believe,” he said.  

“Users, rightly or wrongly, trust products that are designed to help them protect their information and when these are shown to have weaknesses, the impact can be significant.”

To learn more about leaks and how this tool can detect them, visit this link (opens in new tab) and scroll to the very bottom.

Leak testing tools

Online security never stands still and there’s a constant need to keep on top of the latest developments. The folks at ExpressVPN have always underlined the ongoing need for rigorous and regular testing to ensure its services remain as robust as ever. Being able to test for leaks is part of that and the company still maintains its options if you’re keen to carry out your own checks for added privacy and security.

The ExpressVPN team originally developed its leak testing tools for use internally, but ever keen to boost privacy and security throughout the VPN world, the company has released the tools for free. It’s all open source too, which means that anyone who has a vested interest in the world of VPNs can dip in and assess their vulnerability to leaks, along with evaluating their preferred VPN as an added bonus. 

ExpressVPN has every intention of continuing with the provision of these link testing tools and has plans to keep developing them too. That’s great news for those of us who make use of a VPN and in whatever context, be it work, leisure or both. Take the ExpressVPN leak testing toolkit for a spin – you could be surprised at the results.

We've listed the best business VPN (opens in new tab).

TechRadar Pro created this content as part of a paid partnership with ExpressVPN. The contents of this article are entirely independent and solely reflect the editorial opinion of TechRadar Pro.

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Rob Clymo
Rob Clymo

Rob Clymo has been a tech journalist for more years than he can actually remember, having started out in the wacky world of print magazines before discovering the power of the internet. Since he's been all-digital he has run the Innovation channel during a few years at Microsoft as well as turning out regular news, reviews, features and other content for the likes of TechRadar, TechRadar Pro, Tom's Guide, Fit&Well, Gizmodo, Shortlist, Automotive Interiors World, Automotive Testing Technology International, Future of Transportation and Electric & Hybrid Vehicle Technology International. In the rare moments he's not working he's usually out and about on one of numerous e-bikes in his collection.

With contributions from
  • Jonas P. DeMuro
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