UDP 9993
Synopsis
- UDP port 9993 is primarily used by ZeroTier One, a peer-to-peer virtual networking/SD‑WAN overlay.
- ZeroTier clients on Windows, macOS, Linux, iOS, and Android use UDP/9993 for controller contact, peer discovery, and NAT traversal.
- Real-world deployments include MikroTik RouterOS v7’s built‑in ZeroTier, GL.iNet and OpenWrt routers running the ZeroTier package, the OPNsense os-zerotier plugin, and Synology/QNAP NAS ZeroTier packages.
- In practice, organizations usually allow outbound UDP/9993 for ZeroTier; inbound rules are typically unnecessary.
Observed activity
Last 30 days
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