What is a VPN?

What a VPN does

A VPN creates an encrypted tunnel between your device and a server operated by the VPN provider. All your internet traffic passes through this tunnel, meaning:

Your ISP cannot see what websites you visit or what data you transmit
Websites see the VPN server's IP address instead of yours
Your data is encrypted even on public Wi-Fi networks
Your geographic location is masked from online services
Deep packet inspection (DPI) by governments or ISPs is defeated

How it works

When you connect to a VPN, the following process occurs:

Your Device ---[encrypted]---> VPN Server ---> Internet

1. Your device establishes an encrypted tunnel to the VPN server
2. All traffic is encrypted before leaving your device
3. The VPN server decrypts traffic and forwards it to the internet
4. Responses return through the same encrypted tunnel
5. Your real IP is never exposed to the destination server

The encryption ensures that even if someone intercepts your traffic (on public Wi-Fi, for example), they cannot read its contents. The VPN server acts as an intermediary, so websites only see the server's IP address.

VPN Protocols

The protocol determines how your data is encrypted and transmitted. Here are the most common ones:

Recommended

WireGuard

Modern, minimal codebase (~4,000 lines). Uses state-of-the-art cryptography (ChaCha20, Curve25519). Fastest connections and lowest latency. Used by AkcaVPN.

Legacy

OpenVPN

Battle-tested and widely supported. ~100,000 lines of code. Uses OpenSSL. Slower handshakes and higher CPU usage. Available on nearly every platform.

Mobile

IKEv2/IPSec

Good for mobile devices due to MOBIKE support (seamless network switching). Built into most operating systems. Fast reconnections but limited configurability.

When to use a VPN

On public Wi-Fi (airports, cafes, hotels) to prevent eavesdropping
To prevent your ISP from logging and selling your browsing history
When traveling to countries with internet censorship
To protect against network-level surveillance
When you want to keep your IP address private from websites
To bypass throttling on specific services by your ISP

Common misconceptions

Myth A VPN makes you completely anonymous

A VPN hides your IP address, but websites can still track you through cookies, browser fingerprinting, and account logins. A VPN is one layer of privacy, not a complete solution.

Myth All VPNs are the same

VPN providers vary enormously in logging policies, jurisdiction, protocol support, and infrastructure. A no-logs VPN in a privacy-friendly jurisdiction is fundamentally different from a "free VPN" that monetizes your data.

Myth VPNs slow down your internet significantly

Modern protocols like WireGuard add minimal overhead (typically 2-5% speed reduction). Legacy protocols like OpenVPN can be slower, but WireGuard-based VPNs often perform at near-native speeds.

Myth Free VPNs are just as good

Free VPNs must pay for servers somehow. Many log and sell your browsing data, inject ads, or have been caught including malware. If you're not paying for the product, you are the product.