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安全諮詢

DNS is a weak point that may track everything you do

Many people are unknowingly sharing their data. In this post, I’ll show you how to check if you’re one of them and how to fix it quickly.

Your browser needs to find the right website every time you type an address. That’s the role of DNS servers.

The issue?

➔ By default, you use your internet provider’s DNS
➔ These DNS servers keep records of your searches, habits, and activities

Even if you use a VPN or clear your history, the information is still stored. It can be sold or used against you.

A poorly set up VPN can lead to DNS leaks.

What’s the problem?

➔ Your DNS requests go outside the secure tunnel
➔ Your ISP can monitor the websites you visit
➔ Your “anonymity” is lost quickly
✓ Many believe VPN = safety

But if your DNS isn’t secure, you are at risk.

You think your VPN keeps you safe

But you’re using 1.1.1.1, 8.8.8.8, or your ISP’s DNS. That means even if your traffic is encrypted, the sites you visit might still leak outside the tunnel. This isn’t just a small mistake, it’s one of the most common privacy failures.

test dns leak test results

Your Internet provider can tell you’re using a VPN, even if they can’t see what you browse

But if your VPN doesn’t have its own DNS, or if your setup is wrong, your DNS queries might leak. What does this mean? You believe you’re safe, but your requests could be handled by Google or your provider. Many think a VPN hides everything, but DNS leaks can occur. Ensure your VPN has its own secure DNS to avoid revealing more than you think. You can use tools like:

www.controld.com/tools/dns-leak-test

They can help check if your DNS requests are leaking outside your VPN.

Popular VPNs like Mullvad and iVPN offer built-in protection against DNS, IPv6, and WebRTC leaks, but this only works if they are updated and set up correctly.

⚠️ Caution: Some apps use fixed DNS servers, which can ignore your VPN settings and expose your data. This is known as “DNS hardcoding.”

To stay protected, use privacy-focused public DNS like Quad9 (blocks malware) or AdGuard DNS (blocks ads, trackers, and harmful sites; supports secure DNS methods: DoH, DoT, DNSCrypt).

On Android, apps like RethinkDNS and NetGuard allow you to control how apps resolve domain names, keeping you safe even if an app tries to bypass your VPN.

iVPN 標誌
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價格範圍：€ 29,00 至 € 119,00
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Your metadata, like when and how you connect, can still be seen by others even with safe VPNs and DNS

Organisations like the 14 Eyes countries use this information for broad surveillance. That’s why using tools like Tor or multi-hop VPNs is important to make it harder to track you. Want to really protect your privacy? Just encrypting isn’t enough; you also need to hide your metadata.

Read also: 14 Eyes 等組織收集並分享您的元資料，以進行大規模監控。

Now that you understand the importance of protecting your data, here are some simple tools and habits I use to reduce risks:

    1. Use private browsers like Brave.
    2. Choose VPNs that provide multi-hop.
    3. Set up secure DNS.
    4. Avoid using unprotected public WiFi.
    5. Check app permissions for accessing your data.

Privacy is an ongoing journey, not a final goal.

我們如何確保您的硬體通訊安全？

✓ 私人購買的裝置
使用安全的 Android 作業系統 DeGoogled 裝置
作業系統安裝和應用程式設定是透過安全的加密連線完成，每週檢查是否有洩漏。
使用 Threema、Silent Circle 等可信賴的應用程式，以及 iVPN、Mullvad 和 ProtonVPN 等高級 VPN，安全購買
✓ 可根據要求為信使提供虛擬號碼
✓ 我們的資料庫不會儲存任何裝置或應用程式帳號
✓ 移除不必要的應用程式權限
✓ 僅使用優先處理隱私的授權應用程式
✓ 提供全球運送服務，可就近取貨
✓ 可透過銀行轉帳或加密貨幣付款，以保護隱私。確保您的錢包是私密的，或尋找當地的加密貨幣交易商協助。

閱讀更多關於 Cryptvice 業務與團隊的資訊 這裡.

閱讀更多關於我們的客製化裝置 這裡.

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