Knowledge Base

Maintaining Privacy with Proxies

How to maximize your privacy when using proxies, including preventing DNS leaks, fingerprinting, and other tracking techniques.

Maintaining Privacy with Proxies

Using a proxy hides your IP address, but there are other ways websites can track you. Here's how to maximize your privacy.

Beyond IP Address Masking

While proxies hide your IP, websites can still identify you through:

  • DNS leaks: Your DNS queries bypass the proxy and reveal your real ISP.
  • Browser fingerprinting: Your browser's unique combination of fonts, plugins, screen resolution, and other attributes.
  • WebRTC leaks: WebRTC can expose your real IP even when using a proxy.
  • Cookies and local storage: Tracking cookies persist across sessions.

Preventing DNS Leaks

A DNS leak occurs when your computer sends DNS queries directly to your ISP's DNS servers instead of through the proxy.

How to prevent it:

  • Use SOCKS5 with the socks5h:// protocol to resolve DNS through the proxy.
  • Configure your system to use a privacy-focused DNS provider (e.g., Cloudflare 1.1.1.1 or Google 8.8.8.8).
  • Use a DNS leak test to verify your configuration.

Reducing Browser Fingerprinting

Even with a proxy, your browser fingerprint can identify you across sessions.

Mitigation strategies:

  • Use anti-detect browsers like Multilogin, GoLogin, or AdsPower that let you customize your browser fingerprint per profile.
  • Match your fingerprint to your proxy location — a French mobile IP should have a French timezone, language, and locale.
  • Disable or randomize JavaScript APIs that expose hardware details.

Preventing WebRTC Leaks

WebRTC is a browser feature that can reveal your real IP address even when using a proxy.

How to disable it:

  • Firefox: Go to about:config and set media.peerconnection.enabled to false.
  • Chrome: Use an extension like "WebRTC Leak Prevent" or use an anti-detect browser.
  • Anti-detect browsers: Most anti-detect browsers disable WebRTC by default.
  • Clear cookies between sessions or use browser profiles with isolated cookie stores.
  • Use incognito/private browsing mode to prevent cookie persistence.
  • Anti-detect browsers manage cookies per profile automatically.

Matching Proxy Location to Your Activity

For maximum privacy, ensure consistency between:

  • Timezone: Match your browser's timezone to the proxy location.
  • Language: Set Accept-Language to match the proxy country (e.g., fr-FR for a French proxy).
  • Geolocation API: Disable browser geolocation or spoof it to match the proxy.

Best Practices Summary

  1. Use SOCKS5 with DNS resolution through the proxy (socks5h://).
  2. Disable or control WebRTC.
  3. Use anti-detect browsers for multi-account scenarios.
  4. Match browser locale, timezone, and language to proxy location.
  5. Clear or isolate cookies between sessions.
  6. Use mobile proxies for the highest level of anonymity — the IPs are indistinguishable from real mobile users.

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