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TrustedServer: Deep dive into the security of our server tech
This article is written by Shaun Smith, an engineering fellow at ExpressVPN and the creator of TrustedServer. In this article, we’re taking a deep dive into TrustedServer, our industry-leading VPN s...
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Dev blog: A look inside Lightway
VPN protocols define how a client and a server authenticate each other, establish a connection, and transmit data through the created tunnel. Plenty of VPN protocols are available, each made for its o...
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Why you can't judge a VPN by its server count
When it comes to choosing a VPN company, there are many things you'll want to take into account, such as do they provide good speeds? Do they have apps for all my devices? And are they well known and ...
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ExpressVPN leak testing tools
The ExpressVPN Leak Testing Tools are an extensible suite of Python tools designed for both manual and automated leak testing of VPN applications. Developed by ExpressVPN security researchers, the too...
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How ExpressVPN keeps its web servers patched and secure
This article explains ExpressVPN’s approach to security patch management for the infrastructure running the ExpressVPN website (not the VPN servers). In general, our approach to security is: Make s...
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What are DNS leaks and how to prevent them
In a previous blog, we talked about what DNS is, how it works, and why it can give away more information than you might expect. In this post, we’ll take a more in-depth look at what an ISP can see a...
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Technical Overview: Preventing DNS Leaks When Switching Network Interfaces
To effectively offer a user privacy and security, a VPN application must ensure that a user’s DNS requests remain private for the entire duration of the connection to the VPN. Applications usually d...
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What is DNS?
The DNS, which stands for Domain Name System, acts as the phone directory of the Internet. Instead of phone numbers, computers communicate using numeric addresses called IP addresses that look like 19...
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How to use Ansible Variables and Vaults
This post was originally published on July 17, 2017. How we use Ansible extensively at ExpressVPN Our development teams work independently, that is to say, a team owns their product for its full life ...
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How ExpressVPN authenticates its apps
This post was originally published on June 9, 2017. How do ExpressVPN servers know which app belongs to a customer and which does not? On most apps, the authentication happens in the background. Once ...
