The idea of a “Great British Firewall” makes for a catchy headline, but it would be riddled with holes and cause huge problems.
The Guardian reports that the GCHQ (Government Communications Headquarters), a UK intelligence, security, and cyber agency, is exploring the idea of a British firewall offering protection against malicious hackers. It falls within its remit, but one of the measures reportedly discussed—banning VPN software—raises practical and technical questions.
Here’s what you actually need to know, and why you shouldn’t panic about your VPN just yet.
- There are no current plans on the statute books to ban VPNs for everyone. Ministers and regulators explicitly acknowledge VPNs as lawful services with legitimate uses.
- The current political focus is on “online safety”, especially kids accessing porn and harmful content, and how VPNs can undermine the Online Safety Act’s age‑assurance and filtering regime.
- The latest move is an online‑safety consultation that explicitly mentions “options to age-restrict or limit children’s VPN use where it undermines safety protections”, not an outright nationwide ban.
So what may happen is tighter controls around minors, and perhaps pressure on app stores and platforms, rather than a blanket prohibition for adults.
Options
Technically speaking, these are some of the measures available to address VPNs bypassing geo-blocking and local legislation.
- App‑store and download pressure: Require Apple/Google to hide or age‑gate VPN apps for UK accounts, or block listing of some consumer VPNs. This raises friction for non‑technical users but is trivial to route around (sideloading where possible, non‑UK stores, manual configs).
- Commercial provider lists: Buy accounts at popular VPNs, enumerate exit IP ranges, and require ISPs or certain sites (e.g. porn sites) to block those IPs. This can catch a large chunk of mainstream VPN traffic but is high‑maintenance and easy to evade with IP rotation, residential proxies, self‑hosted VPNs, and lesser‑known services.
- Targeted site‑level blocking of VPNs: Require certain categories of sites (e.g. adult sites) to reject traffic that appears to come from VPN IPs, an idea already floated by some experts as more likely than an outright technology ban. That still leaves VPNs usable for everything else, including general browsing and work.
- Age‑based device/network controls: Mandate school networks, child‑oriented devices, or parental control routers to block known VPN endpoints and app traffic, as media regulator Ofcom and others have suggested may be possible at the home‑router level. Again, this targets minors rather than adults and is only as strong as the weakest network they connect to (a friend’s Wi‑Fi, mobile hotspot, etc.).
All of these are “making it harder” tactics rather than a hard technical kill switch.
Why a watertight VPN ban is essentially impossible
To comprehensively block VPNs, the government would need to require internet providers to inspect traffic, restrict apps from app stores, and attempt to cut off access to thousands of VPN servers worldwide. That would be a massive, expensive, and deeply complicated undertaking—and it still wouldn’t work.
Problem 1: VPNs are basically invisible
Modern VPNs are designed to look very similar to normal web browsing. When you load a website over HTTPS (the padlock in your browser) and when you connect to a VPN, the traffic flowing through your internet connection looks almost identical. Reliably telling them apart is a bit like trying to spot which cars on a motorway are taxis versus private vehicles based solely on their tire tread patterns at motorway speed, for every car, in real time. You’d end up accidentally blocking huge amounts of perfectly ordinary internet traffic in the attempt.
Problem 2: Too many legitimate users depend on VPNs
VPNs aren’t just for privacy-conscious consumers. They’re how millions of people securely connect to their workplace from home. The NHS (the UK’s National Health Service) uses them for remote access. Journalists use them to protect sources. Researchers use them to access academic resources. Any serious enforcement effort would have to grapple with the risk of collateral damage to businesses and public services.
Problem 3: The ban would be trivially easy to bypass
Even if the government successfully blocked every major commercial VPN app and service, technically skilled users could simply rent a cheap server anywhere in the world and set up their own private tunnel in under ten minutes. There are also tools designed to evade exactly this kind of blocking, disguising encrypted traffic as ordinary web activity.
We know this because Russia has been trying to block VPNs for years, using the full weight of state enforcement behind it. But VPN usage in Russia has surged, not declined. Blocked services pop up under new names and addresses and new tools emerge overnight. This track record suggests that long-term, comprehensive suppression is difficult, even with aggressive powers of enforcement.
What does this actually mean for UK citizens?
The government can probably make consumer VPN use slightly more inconvenient, removing apps from UK app stores, for instance, or creating legal grey areas for certain uses. But a genuine, technical ban on VPN software and encrypted connections is not realistically achievable without causing serious collateral damage to the UK’s digital economy and the millions of people who depend on this technology for entirely legitimate reasons.
Don’t ditch your VPN. The Great Firewall of Great Britain isn’t coming. And if it tried, it would have more holes than a fishing net.
Hat tip to Stefan Dasic and the Malwarebytes VPN team for their invaluable input.
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