IPv6 and Your Privacy: You May Be Exposed Without Knowing

While everyone focuses on hiding IPv4, IPv6 is often forgotten — and it may be quietly exposing your real address.

What IPv6 is, and why "dual stack"

IPv6 is the next-generation IP address, with a near-infinite supply. Many devices today have both IPv4 and IPv6 (called "dual stack"). When visiting a site, the system may prefer IPv6.

Risk 1: the proxy only covers IPv4

Many proxy/VPN setups only route IPv4 traffic. If both your device and the target site support IPv6, the connection may bypass the proxy and go over IPv6, exposing your real IPv6 address — you think you are hidden, but you left one path open.

Risk 2: address persistence

Historically, some IPv6 addresses were derived from the network card's MAC, effectively carrying a hardware identifier. Modern systems generally enable "privacy extensions" (temporary, rotating IPv6 addresses) to mitigate this, but not everywhere. The more persistent your address, the easier long-term tracking becomes.

How to check

Always check both IPv4 and IPv6: do their ownerships match? With your proxy on, is IPv6 still connecting directly? (Our site currently focuses on IPv4; IPv6 detection is planned.)

How to reduce

• Use a VPN that also handles IPv6, or disable system IPv6 when needed.
• Make sure IPv6 privacy extensions (temporary addresses) are enabled.
• Re-check after switching networks to ensure no IPv6 is leaking directly.