IPv6 is recommended and can greatly improve direct connection reliability if supported on both ends of a direct link.

Supporting either UPnP or NAT-PMP on your network can greatly improve performance by allowing ZeroTier endpoints to map external ports and avoid NAT traversal entirely.

These ZeroTier recommended guidelines are consistent with the vast majority of typical deployments using commodity gateways and access points:

Recommended Local Network and Internet Gateway Configuration To talk with them directly, you need to be able to send them to any port. That means your peers could be listening on any port. A random, high numbered port for use with UPnP/NAT-PMP mappings.A random, high numbered port derived from your ZeroTier address.Required Network Configuration What ports does ZeroTier use? Using your local Pi-Hole setup from anywhere via the Internet.Accessing LAN devices via SSH without opening port to the Internet.Accessing LAN devices behind NAT directly.Hosting a game server at home (useful for LAN only games) or simply creating a LAN party with your friends.MikroTik has added ZeroTier to RouterOS v7.1rc2 as a separate package for the ARM/ARM64 architecture. It provides advanced network virtualization and management capabilities on par with an enterprise SDN switch, but across both local and wide area networks and connecting almost any kind of app or device. The ZeroTier network hypervisor is a self-contained network virtualization engine that implements an Ethernet virtualization layer similar to VXLAN built atop a cryptographically secure global peer-to-peer network.

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