Guides
Free VPN without a credit card
How to start with a free VPN without handing over payment details, how to judge whether a free plan is trustworthy, and how Colitu's free monthly plan works.
October 18, 2026Guides · 3 min readFree VPN without logs: what to check before you install one
How free VPNs pay for themselves, five checks that separate a safe free plan from a risky one, and how Colitu's free plan works.
October 16, 2026Guides · 5 min readAndroid VPN disconnects in the background: how to keep it on
Why Android and phone makers stop VPN apps in the background, and how battery settings, Always-on VPN and maker options keep Colitu connected all day.
October 3, 2026
Guides · 6 min readDNS leak explained: what it is, how to test it and how to fix it
What a DNS leak is, why it reveals the sites you open, how to check with the Colitu DNS leak test and how to fix it with TUN mode and browser settings.
October 3, 2026Guides · 5 min readUDP blocked: what it means for your VPN and Hysteria2
Why some networks block UDP and QUIC, what that does to Hysteria2, and how Colitu's Adaptive Connect falls back to TCP transports without your help.
October 3, 2026
Guides · 7 min readVPN connected but no internet: how to find the cause
The app says Connected, yet nothing loads. Check captive portals, the kill switch, DNS, the server and network changes to get back online in minutes.
October 3, 2026Guides · 5 min readVPN works on Wi-Fi but not on mobile data: causes and fixes
Connects at home but fails on 4G or 5G? How carriers treat UDP, protocols and background data, and what to check on your phone, step by step.
October 3, 2026
Guides · 5 min readWebRTC leak explained: how your browser can reveal your real IP
How WebRTC in your browser can expose your real IP address despite a VPN, how to check it with the Colitu WebRTC leak test and how to close the gap safely.
October 3, 2026Guides · 5 min readWhen a VPN will not connect: understanding DPI and connection problems
What deep packet inspection is, how it can spot VPN traffic and how Reality, Trojan and Hysteria2 try to establish a connection, with honest limits and practical steps. No guarantees.
October 3, 2026
Guides · 2 min readVPN for Android TV and Google TV: installing without Google Play
How to install a VPN on your TV with Downloader and a short address, sign in with a QR code and get steady speeds for video.
October 1, 2026
Guides · 2 min readVPN for Android: always-on, battery and security
How Android runs a VPN, why the connection drops in the background, what Always-on VPN does and how to verify an APK.
October 1, 2026Guides · 3 min readVPN for Windows 11 and 10: system proxy, TUN and kill switch
The difference between system proxy and TUN mode, why you want a kill switch and how to check that all Windows traffic goes through the VPN.
October 1, 2026
Guides · 3 min readWhy your VPN will not connect: step-by-step troubleshooting
From a wrong clock to blocked UDP — the common reasons a VPN fails to connect and how to find yours in five minutes.
October 1, 2026Protocols
Hysteria2 vs VLESS Reality: which protocol to use
Two modern VPN protocols compared: QUIC over UDP against TLS over TCP. Speed on lossy links, what happens when UDP is limited, how each looks on the wire and how Colitu picks one for you.
October 18, 2026Protocols · 3 min readVPN app with VLESS Reality and Hysteria2 built in
Why generic clients need you to bring your own server, what an app with built-in VLESS Reality and Hysteria2 servers changes, and how to set one up in a minute.
October 16, 2026Protocols · 2 min readHysteria2 or WireGuard: which to choose
Comparing two fast UDP protocols by design, speed on bad networks, visibility to DPI and convenience.
October 1, 2026Protocols · 2 min readVLESS or Shadowsocks: what is the difference
Two popular proxy protocols built in opposite ways: one hides under TLS, the other makes traffic look like random data. The pros and cons.
October 1, 2026Protocols · 3 min readWhat is Hysteria2 and why it stays fast on bad networks
How the QUIC-based Hysteria2 protocol works, how it differs from TCP-based protocols and when it is the right choice.
October 1, 2026Protocols · 3 min readWhat is VLESS Reality and how does it work?
How VLESS with Reality is designed to resemble an ordinary TLS connection to a real website, and why it aims to look like HTTPS.
October 1, 2026Security
Is Colitu VPN safe? Who runs it, what it stores and how to check
The company behind Colitu, what the VPN servers record and what they do not, the open-source apps and the limits we publish ourselves.
October 16, 2026
Security · 5 min readTorrents, P2P and VPN: what Colitu allows and why
How torrents and P2P work, what a VPN does and does not change for them, what Colitu's Acceptable Use Policy says and why P2P is not offered right now.
October 3, 2026
Security · 2 min readVPN on public Wi-Fi: what it protects you from, and what it does not
The real risks of open networks in cafés, hotels and airports — fake hotspots, DNS hijacking, captive portals — and an honest look at what a VPN covers.
October 1, 2026