The technology, named OpenBoundary, is a modular, server-level toolkit designed to enable network operators to restrict access to verified criminal domains safely and transparently. Developed with privacy-first infrastructure principles at its core, OpenBoundary introduces network-wide safeguards without altering ExpressVPN’s strict no-logs policy.
OpenBoundary uses the IWF’s verified domain list and operates without deep-packet inspection or user activity logging. The code is verifiable, auditable, and open to scrutiny.
As part of its “Not on My Network” initiative, ExpressVPN is open-sourcing OpenBoundary and will be publishing the underlying code, along with a technical whitepaper and detailed deployment guidance. By doing so, the company is inviting other VPN providers, ISPs, and cloud platforms to adopt similar safeguards and raise the standard for privacy-preserving infrastructure."