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Knowledge

What is a VPN?

How Virtual Private Networks work – and what they do not protect
How a VPN works

A VPN (Virtual Private Network) creates an encrypted tunnel between your device and a VPN server. All your internet traffic is routed through this tunnel. Websites see the VPN server's IP address instead of your real IP, and your ISP can only see that you are connected to a VPN – not what you are doing.

Your IP hidden fromWebsites, online services
Traffic hidden fromYour ISP
Still visible toYour VPN provider
EncryptionYes – all traffic
What a VPN protects
Hides your IP from websites
Encrypts traffic on public WiFi
Hides browsing from your ISP
Bypasses geo-restrictions
Secure remote access to company networks
What a VPN does NOT protect
Cookies and browser tracking
Browser fingerprinting
Malware or phishing
WebRTC leaks (if not configured)
DNS leaks (if misconfigured)
Common VPN protocols
ProtocolSpeedSecurityNotes
WireGuardVery fastVery highModern, recommended
OpenVPNMediumVery highOpen source, widely supported
IKEv2/IPSecFastHighGood for mobile
L2TP/IPSecMediumMediumOlder, avoid if possible
PPTPFastInsecureDeprecated – do not use
VPN leaks – check yours

Even with a VPN enabled, your real IP can leak through WebRTC or DNS. Use our tools to verify your VPN is working correctly:

WebRTC Leak Test DNS Leak Test Check my IP
Knowledge WebRTC DNS Leak IP Lookup My IP

VPN – privacy tool with limitations

A VPN hides your IP address and encrypts your internet traffic, providing privacy from your ISP and anonymity from websites. However, a VPN is not a complete privacy solution – it does not protect against cookies, browser fingerprinting or malware. WebRTC and DNS leaks can expose your real IP even with a VPN active. Always test your VPN with leak tests to ensure it is working correctly.

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