Why Your VPN Gets Blocked by DPI (and What Works)

Why your VPN gets blocked, and what we do about it

The VPN did not get slow. It stopped connecting. That is the experience most of our customers describe, and it is a different problem from the one the mainstream VPN industry solves. A national firewall does not need your keys. It watches the shape of your connection — the handshake, the packet sizes, the timing, how long the flow stays open — recognises it as a VPN, and cuts it. Deep packet inspection makes encryption irrelevant to the question of whether you get online, because nothing in the tunnel is ever read. The tunnel is simply identified and killed.

VitaminVPN is built for that problem specifically. Not for a marketing badge, not for streaming libraries, not for a logo on a comparison chart. For the moment your connection dies and you need it back.

Our own app comes first

The single most effective thing we offer against a filter is our own dedicated app, VitaminVPN. It is not a wrapper around someone else's client — it is ours, which means we maintain it directly against what censors are matching on right now, and we can move faster than any off-the-shelf tool. You sign in with your VPN username and password, press connect, and it finds a working path for you. When a network changes and other tools go dark, it is the one built to keep going.

It runs on Android, Windows, iPhone, iPad and macOS, so whatever you carry, the most resistant option is one download away. That is why, throughout this site, VitaminVPN is the first thing we tell you to try — not a fallback for when everything else fails, but the front door.

Traffic that looks like ordinary web browsing

The only reliable way past a filter that recognises VPN traffic is to stop producing VPN traffic. Our strongest connections do not carry a VPN handshake at all. To anything watching the wire, they look like an ordinary encrypted session to an ordinary large website — the censor sees a normal internet user doing normal internet things.

We take that further than the surface. A disguise fails on details: the order of headers a browser sends, the version string it presents, the way a session is opened and closed. Those details are matched to what a real, current browser actually does, because a mismatch is exactly what an inspection system is looking for. And when an automated prober tries to test one of our endpoints without a valid credential, it does not get a suspicious error — it gets the real site it was pretending to visit.

We keep that disguise current. Censorship is adversarial and it changes; the difference between a VPN that works this month and one that stopped last year is whether somebody is maintaining the camouflage against what firewalls are matching on today. That maintenance is the product.

It does not bet on one path

The second half of the answer is that we never rely on a single disguise. Between our own app and the several protocol families in your account, there is always more than one way in — and our app moves between them for you, on its own, without a support ticket or an evening without internet. The practical effect is that a filtering change means your connection takes a few seconds longer than usual, and you probably never learn why.

That is also why we sell several protocol families rather than one. Xray with REALITY, an obfuscated WireGuard variant, OpenVPN, SSH tunnels and a Telegram proxy each fail under different conditions, and having more than one in your account is the cheapest insurance you can buy. Which protocol suits which network is covered in our protocol guide, and the plans are on the premium plans page.

What we keep: nothing

Here is the privacy statement, plainly: we do not log or keep anything. We do not run a session database — who is connected is held in memory and is gone the moment a process restarts. Our DNS resolver records no queries at any level. Our own data plane forwards your packets without inspecting them and without recording where they went. There is no history of your activity for anyone to hand over, because we do not create one. Our full position is on the privacy page, and the commercial terms are on the terms page.

What we do — and do not — promise

We will not promise you an unblockable protocol, a guaranteed connection in a specific country on a specific day, or an uptime number we cannot honour when a state actor decides to spend a weekend on us. Filtering is adversarial and it moves; anyone quoting you a permanent success rate is describing a wish.

What we do commit to is narrower and more useful: our own app as the first and strongest line, several protocol families behind it so a block on one is not a block on you, a client that fails over by itself instead of asking you to guess, traffic shaped to look like the ordinary web and kept current against what censors match on, and support that answers with the specific thing to try on your carrier — not a copy-pasted article. Tell us the country and the network on the help page and you will get a concrete answer.

Start small

You do not have to take our word for any of it. There is a free allocation — a modest amount of traffic over a limited period, on a scoped set of nodes — which is enough to find out whether we connect on your network before you pay anything. If it works, plans and volumes are on the VPN plans page, servers on the VPS page, and your configs appear immediately at Start free.

If it does not work, tell us. On this problem, a failed connection report from a real network in a real country is worth more to us than a review.