VPN engineering notes and guides
How the protocols work, why the product is built the way it is, and what a VPN can and can't do — written by the people running the network, without the marketing gloss.
Turn off or switch a VPN on Android and Samsung — plus Chrome VPNs
Where Samsung and stock Android hide the VPN menu, fixing Always-on reconnects and kill-switch blackouts, and the truth about Chrome VPNs.
Turn off, switch, or turn on a VPN on iPhone — and fix a stuck one
Why an iPhone VPN won't turn off (Connect On Demand) and the fix, plus switching apps and cleaning stale configurations — by an iOS VPN team.
Does a VPN still work in China? Measured on real devices (August 2026)
Real-device tests on networks inside China — which protocols DPI kills, which connect, why to install before flying, and honest eSIM limits.
A VPN for football in 2026/27 — what works and what nobody can promise
Where a VPN genuinely helps with football (watching your home service from abroad), picking servers for smooth streams, and honest limits.
What is Douyin? Douyin vs TikTok, and watching from Thailand
China's TikTok from the same company but a separate universe — we test real access from Thailand and give straight answers on what a VPN does.
What is the VPN in your phone's settings? On or off, and is it safe?
Why every phone ships a VPN menu you never installed, on-vs-off, real safety answers, and how switching and cancelling work — in one page.
What is VK? Access from Thailand, tested for real (August 2026)
Russia's biggest social network, tested from a real Thai ISP with the date shown — the access problems people hit and where a VPN helps.
How Smart Connect picks your route (and why we keep no record of it)
Smart Connect races every server–protocol pair from your device and falls back to TCP 443 when UDP is blocked. Not AI — and the choice never leaves your phone.
Why TukTukVPN runs three protocols (and switches for you)
VLESS+Reality, Hysteria2, and WireGuard each solve a different problem. What each one is good at, where each one fails, and why automatic switching beats betting on a single protocol.
Why your VPN dies on hotel Wi-Fi (and what a good one does about it)
Captive portals, blocked UDP, and DPI make hotel Wi-Fi hostile to VPNs — why WireGuard-only apps hang forever, and how a TCP-443 fallback keeps you online.
A plain-English guide to modern VPN protocols (2026)
WireGuard, Hysteria2, VLESS+Reality, and the obfuscation-vs-DPI arms race — what each protocol actually does, explained without marketing gloss.