Blog
Privacy & censorship deep-dives
Technical deep-dives on VPN protocols, censorship resistance, and privacy engineering.
Featured
How to choose a VPN in 2026: an honest buyer's guide
Most VPN listicles are paid placement. This guide is not. What actually matters: jurisdiction, audits, protocols, kill switch design, and red flags.
VLESS Reality: the protocol guide for VPN users in 2026
VLESS Reality forwards a real TLS certificate from a public site, so DPI sees ordinary HTTPS. How it works and how it compares to other protocols.
17 min readFree VPNs: how they actually make money, and why that's the problem
Free VPNs sell the data they promised to protect, inject ads, rent out your bandwidth, and in documented cases turn client devices into botnets. Here's the receipt.
6 min readHow DNS leaks quietly expose your location, even with a VPN running
DNS leaks happen when domain lookups bypass your VPN tunnel and reach your ISP. Smart Multi-Homed Resolution, IPv6, and WebRTC all open side channels. Here's what leaks and how to plug each one.
6 min readHow to choose a VPN in 2026: a buyer's guide that isn't a sales pitch
What to look for, what to ignore, and the red flags that should kill a purchase. Jurisdiction, logging, kill switch type, protocol support, audits, pricing transparency.
6 min readWhy Fexyn charges $9.99 in the US and $2.99 in Turkey: regional pricing, explained
A flat global VPN price excludes most of the people who need a VPN most. Fexyn uses a 4-tier pricing system across 192 countries based on purchasing-power parity. Here's the methodology, openly.
7 min readShort-lived VPN certificates: why 24 hours beats 12 months
Most VPNs issue certificates valid for months or years. If one leaks, the attacker can impersonate a server until manual revocation — and CRL distribution is famously slow. Fexyn issues 24-hour certificates from Vault PKI.
6 min readVPN for Turkey: how DPI catches WireGuard, and what works instead
Turkey filters VPNs at the protocol level. Standard WireGuard and OpenVPN sessions get detected and throttled. Here's what's actually blocked, how Türk Telekom and BTK do it, and why VLESS Reality is the option that gets through.
6 min readVPN protocols compared: WireGuard, OpenVPN, VLESS Reality, and the rest in 2026
Honest comparison of WireGuard, OpenVPN, VLESS Reality, IPSec/IKEv2, and Shadowsocks. Speed, security, censorship resistance, setup. Which to use when.
6 min readWebRTC leaks, explained: how your browser hands over your real IP
WebRTC is a browser API for peer-to-peer connections. Pages can use it to fetch your real public IP even with a VPN running. Here's why, how to test, and how to disable it per browser.
7 min readWhat a VPN kill switch actually does (and why most are useless)
Most VPN kill switches live in the app and react after a drop has already leaked traffic. A real kill switch fires before the handshake completes, at the kernel level. Here's the difference.
6 min readWhat your ISP can actually see without a VPN (and what they do with it)
Every DNS query, every domain via SNI, every connection's timing and volume. Here's what your ISP knows, what they sell to whom, and how a VPN changes the picture.
7 min readHow to bypass internet censorship in 2026: protocols that actually work
OpenVPN is fingerprinted in 30 seconds. WireGuard is blocked in Russia, China, and Iran. Here are the protocols that still work in 2026, ranked by effectiveness against state-level DPI.
18 min readVLESS vs Shadowsocks: which protocol actually beats censorship?
Shadowsocks made censorship circumvention mainstream. But China learned to detect encrypted random noise. VLESS Reality takes a different approach: look like normal HTTPS, not like nothing.
9 min readWhat is deep packet inspection and how VPNs defeat it
DPI systems inspect your traffic payloads, not just headers. Russia's TSPU detects OpenVPN in 30 seconds. Here's how DPI works, which protocols it catches, and which ones survive.
13 min readVLESS vs WireGuard: when speed meets censorship resistance
WireGuard is fast and simple. VLESS Reality is invisible to censors. Both are good protocols for different situations. Here's when to use which.
11 min readXRay core explained: the engine behind censorship-resistant VPNs
XRay is the proxy platform that powers VLESS, Reality, and most modern censorship circumvention tools. It's not a protocol. It's the engine that runs them.
9 min readHow VLESS Reality makes VPN traffic invisible to censors
VLESS Reality performs a real TLS handshake with sites like microsoft.com, forwarding their actual certificate. To any DPI system, your VPN traffic is indistinguishable from normal HTTPS browsing.
12 min readWhat is VLESS? A protocol built for censorship resistance
VLESS is a lightweight proxy protocol from the XRay ecosystem that delegates encryption to TLS, eliminating double-encryption overhead. Here's how it works and why it matters for VPN users in censored countries.
10 min readWhy VLESS Reality beats WireGuard in censored countries
WireGuard is fast, but it's trivially detectable by DPI. VLESS with Reality makes your VPN traffic indistinguishable from visiting microsoft.com. Here's how it works and why it matters.
4 min read
Try Fexyn free for 7 days
Windows app available now in Beta. WireGuard, VLESS Reality, and OpenVPN with no browsing-history, DNS-query, or traffic-content logs.
See pricing