Copyright 2025 PortGuard. All rights reserved.
Acknowledgement: PortGuard includes modified work from the fwknop project, originally created by Michael Rash and contributors.
fwknop is distributed under the GNU General Public License v2 or later (GPLv2+). PortGuard keeps the applicable copyright notices and license terms for fwknop-derived components.
fwknop upstream
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GPLv2 license