IPv6 Still Exposes Privacy Risks Despite EUI-64 Fixes and Default Router Protections
Updated
Updated · MUO - MakeUseOf · Jul 11
IPv6 Still Exposes Privacy Risks Despite EUI-64 Fixes and Default Router Protections
1 articles · Updated · MUO - MakeUseOf · Jul 11
Summary
IPv6 can still make users and households easier to track even after major fixes removed the old practice of embedding a device’s 12-digit MAC address in its address.
Stable ISP-assigned network prefixes can remain unchanged for weeks or months, letting observers correlate activity from the same home network even when devices use rotating temporary addresses.
VPN coverage is another weak point: some apps still protect only IPv4 traffic, allowing IPv6 connections to bypass the tunnel and reveal a user’s real address unless leak tests show otherwise.
NAT’s disappearance in IPv6 does not automatically make devices unsafe, because most routers block unsolicited inbound traffic by default, but users should still verify IPv6 firewall settings.
The broader takeaway is caution rather than alarm: IPv6 is essential as IPv4 is exhausted, but privacy now depends more on ISP behavior, VPN support and router configuration.