QNAP
Deprecated Platform
QNAP is a Tier 3 (deprecated) platform. This page is preserved for reference but ZeroTier no longer actively supports this platform. See Supported Platforms for more information.
Install QVPN (recommended)
QVPN provides your NAS with a permanent /dev/net/tun device used by ZeroTier. Once you install QVPN you do not need to open it or configure it: App Center -> Search "QVPN" -> Install. If you opt not to install QVPN you will need to find a way to re-create the /dev/net/tun on each reboot. Good luck.