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Local area network anonymity hardening tool for Linux (lemmy.world)

submitted 2 days ago by Nikolas5476@lemmy.world to c/cybersecurity@sh.itjust.works

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Source code and details: https://github.com/nikolas-trey/LANGhost

Description

LANGhost is a Linux anonymity hardening layer for systems managed by NetworkManager. It minimizes identity leakage across multiple network surfaces during connection setup, enforces privacy-focused connection configurations, and implements a fail‑closed mechanism that terminates or isolates connectivity when runtime checks detect unsafe conditions.

What it does

Randomizes MAC policy before activation.
Assigns a randomized DHCP hostname before activation.
Applies a per-activation identity seed for NetworkManager-derived identifiers.
Hardens DHCP identity behavior.
Enables stronger IPv6 privacy behavior and stable-privacy address generation.
Disables local discovery features that can expose system identity on managed links.
Quarantines interfaces with tc drop filters during setup.
Verifies runtime state after activation and triggers a kill switch on failure.

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[–] Nikolas5476@lemmy.world 5 points 2 days ago

LANGhost hardens exactly the window between "network interface comes up" and "WireGuard tunnel is established." Without it, your real MAC, hostname, and DHCP identifiers are visible to the public network operator during that bootstrap phase, before any application traffic is protected by the tunnel. I recommend not adding unnecessary complexity by chaining Tailscale and another VPN. A second VPN would only add value if you specifically need to hide your home IP from destination servers.