Teal VPN for Windows includes code from these projects:

amneziawg-windows (github.com/amnezia-vpn/amneziawg-windows) - MIT License.
  Copyright (C) 2019-2021 WireGuard LLC. All Rights Reserved.
  Files copied unchanged except the package name: internal/engine/{interfacewatcher,
  defaultroutemonitor,mtumonitor,deterministicguid}.go (commit e90531d). addressconfig.go is
  the same copy with three marked changes in configureInterface (2026-10-04: routes before
  addresses, address created "preferred", no duplicate-address detection on IPv4), which
  bring it in line with the current official client (WireGuard/wireguard-windows),
  and the packages it provides (conf, tunnel/firewall, tunnel/winipcfg, services).

amneziawg-go (github.com/amnezia-vpn/amneziawg-go) - MIT License.

Wintun (www.wintun.net) - prebuilt, signed wintun.dll 0.14.1, distributed alongside
  Teal under the Wintun Prebuilt Binaries License (used only through wintun.h's API).
  zip sha256 07c256185d6ee3652e09fa55c0b673e2624b565e02c4b9091c79ca7d2f24ef51.

The MIT License: Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"), to deal in the
Software without restriction, including without limitation the rights to use, copy, modify,
merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit
persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or
substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY
OF ANY KIND.

Xray-core (github.com/xtls/xray-core) - Mozilla Public License 2.0.
  Carries the hidden TCP-443 door (internal/door): only its TUN inbound and the VLESS + REALITY
  transport are linked. Source: the module version named in go.mod; MPL-2.0 text at
  https://www.mozilla.org/MPL/2.0/. Its network stack is gVisor (gvisor.dev/gvisor, Apache-2.0).

go-webview2 (github.com/wailsapp/go-webview2) - MIT License. Copyright (c) 2020 John Chadwick.
  The window host's bridge to Microsoft's WebView2 runtime (cmd/teal-app).

go-winio (github.com/Microsoft/go-winio) - MIT License. Copyright (c) 2015 Microsoft.
  Named pipes between the window and the service (internal/ipc).

The firewall package internal/firewall is a copy of amneziawg-windows' tunnel/firewall (MIT, above)
with two marked additions: local-network permits and the standing kill switch (Arm/Disarm).

