How to check if your VPN is working: The NymVPN way
Prevent data leaks proactively and ensure your privacy is secure
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Having a VPN that says "Connected" isn’t enough. その有効性を確認しなければ、デジタルプライバシーが危険にさらされたままになる可能性があります。IPアドレス、DNSリクエスト、さらにはWebRTCリークさえも、第三者や監視システムから見えるままになってしまうからです。
This article will guide you through how to test your VPN, including decentralized VPNs (dVPN) like NymVPN, and show why metadata protection is just as important as encryption.
Why VPN testing matters
A Virtual Private Network (VPN) that appears active may still leak data:
- Your real IP address, through WebRTC
- DNS requests, revealing the sites you visit
- Metadata patterns, like timing and traffic volume
- Silent drops, when your connection fails without warning
These leaks can compromise your security, especially when using dApps, remote access, or accessing confidential networks. To understand how metadata is tracked, check out Nym’s guide to What is metadata & what can it reveal?.
How to test your VPN
A secure VPN should mask your original IP address. With NymVPN, IP protection works alongside an underlying mixnet that ensures unlinkability. To confirm:
- Visit a site that shows your IP (e.g., a Nym blog)
- If your VPN is active, the displayed IP should differ from your true IP
Learn more about how mixnets power metadata protection in What is a mixnet?.
DNS leaks can undo your VPN’s privacy. Ensure your DNS queries are not sent through your ISP: start by reviewing our guide What are DNS leaks and how to prevent them?
NymVPN makes sure all DNS traffic routes through the encrypted mixnet — blocking leaks at the network level.
Modern browsers use WebRTC, which can expose your real IP even when a VPN is active.
NymVPN includes built-in protections against WebRTC leaks. You should still verify it by checking your browser:
- Navigate to device settings and disable WebRTC features
You can refer to Nym’s Support Center article What to do if NymVPN is leaking DNS/WebRTC and IPv6 addresses for more info.
A silent disconnection can expose your real identity. NymVPN includes a system-level kill switch that blocks all traffic if the VPN disconnects. You can simulate a disconnect:
- Turn off NymVPN mid-session
- If traffic stops immediately, your kill switch is operating correctly
キルスイッチがなぜ重要なのかについては、『VPNのキルスイッチとは何か、そしてなぜ重要なのか？』(/blog/what-is-a-vpn-kill-switch) をご覧ください。
Even if your content and DNS are secure, metadata — like timing, volume, and routing patterns — can still reveal sensitive information. Only decentralized VPNs with mixnets, like NymVPN, can obscure this metadata by routing packets through multiple independent nodes and with added network noise to combat surveillance.
Nym's Noise Generating Mixnet
Why NymVPN excels at leak prevention
NymVPN goes beyond typical VPN protections:
- Uses a decentralized mixnet to obfuscate metadata
- Includes full DNS leak protection
- Safeguards against WebRTC and IPv6 leaks
- Offers a reliable kill switch to prevent IP exposure
- No centralized logs: NymVPN is anonymous by design, not by policy
分散型VPNと従来のVPNの比較で、NymVPNの特長をご確認ください。
Join the online privacy revolution
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Checking if VPN works: FAQs
集中型VPNでは、そのログ非保持ポリシーを信頼する必要があります。 NymVPN’s decentralized design removes that need: no central logs, no problem.
Ideally after setup, when switching servers or devices, or anytime you update the VPN software.
Mixnets introduce latency: it is best for latency-tolerate traffic like crypto transaction, private messaging, and email. But NymVPN balances this with the performance of the Fast mode, which is a decentralized 2-hop network powered by AmneziaWG (a fork of the WireGuard protocol.
Yes. Use browser-based tools and network utilities to verify IP, DNS, and WebRTC behavior on any platform.
Restart NymVPN, switch servers, update the client, or review our support docs — especially the DNS/WebRTC leak article above.
About the authors
Benjamin Nemeroff
Casey Ford. PhD
Technical reviewer目次
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What is a VPN (Virtual Private Network)?
A guide to the popular privacy tool with centralized and decentralized forms