Ferrite.

Get Ferrite for Windows.

Free forever — real system-level enforcement, per-app and by rule. Zero telemetry. A published SHA-256 you can verify yourself.

Windows
10 / 11 · 64-bit · NSIS installer
Download .exe
Includes
Full rule engine (app · IP · port · domain · time · geo) + 120+ protocols identified, 30+ deep-inspected.
Pro unlock
Same download for every tier — Pro features are license-locked until you start the 3-day in-app trial or activate a FERRITE_ key from checkout.
File
Ferrite_1.0.3_x64-setup.exe
SHA-256
e7718216e7e6b6b7214d3cd987bd75fae26972fee0305fdc5d955c75673ba23f
Updater
minisign — bundled public key, signed auto-updates

Windows will flag it as “unknown publisher” — here’s exactly what to click

New publishers start at zero reputation with SmartScreen — it’s a download-history check, not a safety verdict, and it clears in three clicks.

  1. 1

    Double-click the .exe. Windows shows a blue “Windows protected your PC” screen.

  2. 2

    Click More info.

  3. 3

    Click Run anyway, then approve the admin (UAC) prompt.

Don’t take our word for it — verify the exact bytes before you run it:

Get-FileHash .\Ferrite_1.0.3_x64-setup.exe -Algorithm SHA256

Expected hash starts e7718216e7e6b6b7… (full value in the table above). Ferrite sends zero telemetry either way — your connection data never leaves your machine, signed or not.

Operating system
Windows 10 22H2+ / 11 · x64 · WebView2
Footprint
~40 MB installed · 4 GB RAM (8 GB for Pro DPI)
Permissions
Admin to install & to block; visibility runs as a standard user

macOS (system extension) and Linux (eBPF / TC) are on the roadmap. Ferrite includes cryptography and isn’t available in embargoed regions or to sanctioned parties.