What is IPv6 Privacy Extensions?
A feature that generates temporary, randomized IPv6 addresses to prevent tracking based on your device's permanent hardware address.
Standard IPv6 addresses include your device's MAC address, creating a permanent identifier that can track you across networks. Privacy extensions solve this.
The Problem
- IPv6 addresses are typically derived from your network interface's MAC address
- This creates a globally unique, permanent identifier
- Websites and trackers can correlate your activity across different networks
How Privacy Extensions Work
- Generate temporary, random interface identifiers
- Addresses rotate periodically (typically every 24 hours)
- The permanent address still exists but isn't used for outgoing connections
How to Enable
- Windows: Enabled by default since Windows Vista
- macOS: Enabled by default
- Linux: Add
net.ipv6.conf.all.use_tempaddr = 2to sysctl - Android: Enabled by default on most devices
Related Terms
Browser Fingerprinting
A tracking technique that collects information about your browser, device, and settings to create a unique identifier. Unlike cookies, fingerprints are nearly impossible to delete and can track you across websites without your knowledge or consent.
IP Address
A unique numerical identifier assigned to every device connected to a computer network. Your IP address reveals your approximate geographic location and can be used to track your online activity, link your actions across websites, and identify your internet service provider.
Virtual Private Network
A technology that creates a secure, encrypted connection over a less secure network, such as the public internet. VPNs mask your IP address, encrypt your internet traffic, and can make it appear as though you're browsing from a different location.
Have more questions?
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