Knowledge base
Guides
How the protocols actually work, and what a VPN does and does not change about what others can learn about you. Written for people who want the mechanism, not a sales pitch.
Test your own connection for leaks →49 articles are available in English. The full knowledge base of 56 guides is in Russian.
Setup
6 min read
Happ VPN Client: Download for Windows, macOS, Android and iPhone — What It Is and How to Set It Up (2026)
Happ is a free client for VLESS Reality and Hysteria2. Official downloads for every platform, why the Russian App Store no longer carries Happ and what to install on an iPhone instead, how to add a subscription link and the four settings that fix most problems.
5 min read
INCY VPN Client: What It Is, Where to Download It and How to Add a Subscription (2026)
INCY is a free client on the Xray core for iPhone, Android, Windows, macOS, Linux, Android TV and Apple TV: where to get it, what to press on first launch, how to add a subscription with one link and why the ping column shows «N/A».
5 min read
How to Set Up a VPN Without Telegram or an App Store (2026)
Sign up, pay and configure a VPN entirely in a browser: no messenger, no bot, no App Store region switch. The subscription link works in any client — Happ, V2RayTun, INCY.
8 min read
Choosing a VPN client in 2026: what matters
Which client to pick for Android, iOS, Windows and macOS, what actually differs between them, and which specs are worth ignoring.
7 min read
What a VPN kill switch actually does
A kill switch is a firewall rule, not a watchdog. Where the real gaps are, why LAN exceptions exist, and why an iPhone kill switch works differently.
7 min read
Split Tunneling and the DNS Trap
Split tunneling is two mechanisms under one name. How routing rules differ from process filters, and why DNS is what actually breaks.
9 min read
VPN Not Working on Windows 11: Fix It by Elimination, Not by Guessing (2026)
A diagnostic order for Windows 11 that halves the problem at every step: routing versus DNS in thirty seconds, what errors 809, 789 and 691 actually mean, the WAN Miniport reset after a feature update, and why a WireGuard handshake failure is never about cryptography.
8 min read
VPN Not Working on Android? Start with the Android 16 Bug Google Has Not Fixed (2026)
Android 16 has an acknowledged always-on VPN fault that drops tunnels silently, and it is the first thing to rule out. Then Private DNS conflicts, battery optimisation killing the tunnel with the screen off, per-app routing, and captive portals.
8 min read
VPN Not Working on iPhone or iPad after iOS 26? What Apple Removed, and the Fixes (2026)
iOS 26 and iPadOS 26 dropped legacy VPN algorithms, which silently breaks older IKEv2 and L2TP profiles. Plus on-demand reconnect loops, configurations that refuse to install, iCloud Private Relay collisions, and what Reset Network Settings really clears.
8 min read
VPN Not Working on Mac after macOS 26 Tahoe? Extensions, Removed Algorithms and a DNS Bug (2026)
Three things break Mac VPNs in 2026 and none of them are the app: a system extension that was never approved, legacy algorithms Apple deleted from the built-in client, and a Tahoe interface-ranking fault that leaks DNS while the tunnel looks perfectly healthy.
9 min read
VPN Not Working on Linux: systemd-resolved, Split DNS and the Leak Nobody Notices (2026)
On Ubuntu 24.04 and 26.04 the tunnel is rarely the problem — systemd-resolved is. Per-interface resolvers, stale scopes left behind after a disconnect, the two commands that show what is actually resolving where, and a kill switch that survives a crash.
8 min read
VPN Connected But No Internet: A Five-Minute Diagnosis for Any Device (2026)
The status says connected and nothing loads. Two commands decide whether it is routing, names or packet size — and each answer leads somewhere different. Commands for Windows, macOS, Linux, Android and iOS, and what to do with each result.
7 min read
Why Your VPN Keeps Disconnecting: Idle Timeouts, Roaming and the MTU Loop (2026)
A VPN that drops every few minutes and one that drops when you leave the house have nothing in common. Five distinct causes, how to tell which one you have from the pattern of the drops alone, and the fix for each.
8 min read
Running a VPN on Your Router: What It Fixes and What It Quietly Breaks (2026)
One tunnel for the whole house sounds obvious until the router's CPU becomes your speed limit, every device shares one reputation, and the smart TV you did it for is the one thing that stops working. What changes, what it costs, and when a single device is the better answer.
How it works
7 min read
Proxy Types Compared: Residential, Datacenter, Mobile and Premium (2026)
Four proxy types measured rather than described: single-thread and parallel speed, the spread between exits of one pool, rotation versus sticky sessions, picking a country from the login, and why a mobile gigabyte costs four times a datacenter one.
5 min read
Datacenter or Residential Proxies: How to Choose Without Overpaying (2026)
Datacenter versus residential proxies, measured: twice the speed, twice the price, what separates a server-facility address from a home one, and the single question that decides which type your task needs.
5 min read
What is VLESS Reality and how it works (2026)
How REALITY borrows a real site's TLS handshake so the connection looks ordinary from outside, and why no certificate of your own is needed.
5 min read
VLESS Reality vs Hysteria2: which VPN protocol to use in 2026
VLESS Reality vs Hysteria2 compared: TCP against UDP/QUIC transport, latency, and how each protocol behaves on mobile data and crowded Wi-Fi, plus when to switch.
7 min read
Post-quantum encryption in VPNs: why it matters now
Harvest now, decrypt later: why traffic captured today needs post-quantum key exchange before quantum computers exist, not after.
7 min read
Why a VPN is not full anonymity: the GDID case (2026)
A VPN hides your address but not the identifiers your OS sends outside the tunnel. A real 2026 case and what anonymity actually requires.
7 min read
Sybil filters in airdrops: how wallets get linked
What links wallets to one person beyond the IP address, why shared exit nodes hurt, and how filtering decisions are actually made.
8 min read
What is Xray-core, and how is it different from V2Ray?
Xray-core is the proxy engine behind VLESS, Reality, VMess, Trojan and Shadowsocks. What it is, how the V2Ray fork happened, and whether you need to touch it at all.
8 min read
VPN subscription links: what they are and how to handle
A subscription link is a live settings channel and a credential at once. What it carries, why it updates, and how to treat it safely.
8 min read
Can my ISP see my VPN traffic? What stays visible in 2026
What your provider can and cannot observe once traffic goes through a tunnel: addresses, volumes, timing — and what stays hidden.
8 min read
DNS leak test: what the result actually means, and what it misses
A DNS leak means your address is hidden while the list of sites you visit is not. How it happens, how to test for it, and how to fix it.
9 min read
TLS fingerprinting: how clients are told apart
Every TLS client has a handshake signature. What JA3 and JA4 capture, why mimicking a browser matters, and what it does not solve.
8 min read
Why QUIC and UDP get blocked on some networks
QUIC is fast but frequently restricted. Why networks limit UDP, how to tell it apart from a broken server, and what to fall back to.
8 min read
MTU and fragmentation: the hidden cause of slow VPNs
Pages hang while the speed test looks fine: how a wrong MTU quietly breaks a tunnel and how to find the right value.
8 min read
VPN device limits: how HWID binding works and what it cannot stop
Why services cap simultaneous devices, how the counting usually works, and what to do when a limit hits at the worst moment.
6 min read
What your VPN client leaks locally (2026 findings)
The 2026 Xray client findings: an open control interface and an unauthenticated local proxy. What is fixed and what to check yourself.
6 min read
WebRTC Leak Tests: What They Actually Measure
A leak test prints several addresses and only one of them answers the question. How ICE candidate types, mDNS, and your routing table decide what a page sees.
6 min read
Your browser clock vs your exit address
Why sites flag you: the IANA time zone and locale your browser reports for free, why they contradict your exit IP, and what that costs you.
7 min read
IPv6 Leaks and Why Leak Tests Disagree
A red IPv6 leak result and a green one can both mislead. How dual-stack routing, Happy Eyeballs, and tunnel policy decide what actually leaks.
7 min read
Encrypted Client Hello, explained plainly
ECH encrypts the hostname in a TLS handshake, but only when DNS, the site's provider and your browser all cooperate. What it hides and what it does not.
7 min read
Private Wi-Fi Address: What It Hides, and From Whom
MAC randomization hides you from passive Wi-Fi scanners, not from the network you sign in to. What it covers, what still leaks, when to turn it off.
8 min read
Where Your IP Says You Are: Why Four Databases Give Four Answers (2026)
Geolocation databases do not observe servers, they infer them — and they infer differently. Five exits checked against four sources on 28 August 2026: two agreed everywhere, one moved a French server to the Netherlands, and one put a London address in Tehran.
7 min read
How a Website Decides You Are Using a VPN (2026)
Detection is not one check but a stack of them, ordered by how cheap they are: address ranges, geolocation mismatch, resolver position, TLS fingerprint, timing and account history. What each signal can and cannot see, and which of them you can influence.
7 min read
VPN, Proxy or Tor: Which One Fits Which Job (2026)
Three tools that hide an address and share almost nothing else. What each one moves, who can still see what, what it costs in latency and throughput, and the tasks where picking the wrong one is not a small mistake.
Everyday use
7 min read
VPN with a Russian IP Address: What It Unlocks, How It Works and What It Costs (2026)
Why a European or US server does nothing for RuTube, VK Video, Gosuslugi or a Russian bank, how a Russian exit address in Moscow works, what it costs on the PRO plan and how to set it up so Russian sites actually go through the tunnel.
8 min read
How to Watch RuTube and VK Video from Outside Russia
RuTube and VK Video keep part of their catalogue locked to Russian IP addresses. Why an American or European VPN server does nothing for this, what a Russian exit node costs, and how to set one up in Happ step by step.
5 min read
Mobile Proxies: Why They Cost Four Times More and When That Pays (2026)
Mobile proxies in numbers: where the trust in carrier addresses comes from, why a gigabyte costs four times a datacenter one, how rotation and sticky sessions differ, and the tasks where paying the premium buys nothing.
6 min read
Seed phrases on public Wi-Fi: how people lose wallets
How wallet access is really lost on shared networks, which risks a tunnel removes and which it does not, and what to do before you connect.
8 min read
Self-hosted VPN vs a service: the real trade-offs
What running your own server actually costs in time and attention, where it wins, and when buying a subscription is the honest answer.
7 min read
Why VPN users get CAPTCHAs: IP reputation explained
Challenges follow the exit address, not your protocol. How edge services read ASN class, abuse history and request rate, and why sharing an exit has a cost.
6 min read
How Free VPNs Make Money: The Bandwidth Resale Model
Free tunnels get paid for somehow. The mechanism behind bandwidth resale: an SDK, a control connection, and your home address as someone else's exit.
7 min read
Why your VPN speed test comparison is meaningless
A browser speed test picks its own server from your apparent location, so it changes targets when you switch exits. What to measure instead.
7 min read
Does a VPN Add Ping? The Arithmetic, With Numbers From Five Servers (2026)
Latency added by a tunnel is not a mystery: it is the detour in kilometres, plus a few milliseconds of processing. Where the delay actually accumulates, why the second leg is nearly free, and how to measure the difference honestly instead of guessing from a speed test.
6 min read
Does a VPN Drain Your Phone Battery? Where the Power Actually Goes (2026)
Encryption is not what costs you power — the radio is. Why keepalive intervals and NAT timeouts matter more than the cipher, which settings genuinely change consumption, and how to measure the difference on your own phone instead of trusting a number from a review.
6 min read
Turkish IP Address: What It Actually Gets You, and What It Does Not (2026)
What changes when your traffic exits in Istanbul, why regional pricing follows your payment card rather than your IP, how to switch the server on in a minute, and the one network path where this location does not work.