README.md

ZeroTier One Network Virtualization Service

This is the actual implementation of ZeroTier One, a service providing connectivity to ZeroTier virtual networks for desktops, laptops, servers, VMs, etc. (Mobile versions for iOS and Android have their own implementations in native Java and Objective C that leverage only the ZeroTier core engine.)

Local Configuration File

A file called local.conf in the ZeroTier home folder contains configuration options that apply to the local node. (It does not exist unless you create it). It can be used to set up trusted paths, blacklist physical paths, set up physical path hints for certain nodes, and define trusted upstream devices (federated roots). In a large deployment it can be deployed using a tool like Puppet, Chef, SaltStack, etc. to set a uniform configuration across systems. It's a JSON format file that can also be edited and rewritten by ZeroTier One itself, so ensure that proper JSON formatting is used.

Settings available in local.conf (this is not valid JSON, and JSON does not allow comments):

{
	"physical": { /* Settings that apply to physical L2/L3 network paths. */
		"NETWORK/bits": { /* Network e.g. 10.0.0.0/24 or fd00::/32 */
			"blacklist": true|false, /* If true, blacklist this path for all ZeroTier traffic */
			"trustedPathId": 0|!0, /* If present and nonzero, define this as a trusted path (see below) */
			"mtu": 0|!0 /* if present and non-zero, set UDP maximum payload MTU for this path */
		} /* ,... additional networks */
	},
	"virtual": { /* Settings applied to ZeroTier virtual network devices (VL1) */
		"##########": { /* 10-digit ZeroTier address */
			"try": [ "IP/port"/*,...*/ ], /* Hints on where to reach this peer if no upstreams/roots are online */
			"blacklist": [ "NETWORK/bits"/*,...*/ ] /* Blacklist a physical path for only this peer. */
		}
	},
	"settings": { /* Other global settings */
		"primaryPort": 1-65535, /* If set, override default port of 9993 and any command line port */
		"secondaryPort": 1-65535, /* If set, override default random secondary port */
		"tertiaryPort": 1-65535, /* If set, override default random tertiary port */
		"portMappingEnabled": true|false, /* If true (the default), try to use uPnP or NAT-PMP to map ports */
		"allowSecondaryPort": true|false /* false will also disable secondary port */
		"softwareUpdate": "apply"|"download"|"disable", /* Automatically apply updates, just download, or disable built-in software updates */
		"softwareUpdateChannel": "release"|"beta", /* Software update channel */
		"softwareUpdateDist": true|false, /* If true, distribute software updates (only really useful to ZeroTier, Inc. itself, default is false) */
		"interfacePrefixBlacklist": [ "XXX",... ], /* Array of interface name prefixes (e.g. eth for eth#) to blacklist for ZT traffic */
		"allowManagementFrom": [ "NETWORK/bits", ...] |null, /* If non-NULL, allow JSON/HTTP management from this IP network. Default is 127.0.0.1 only. */
		"bind": [ "ip",... ], /* If present and non-null, bind to these IPs instead of to each interface (wildcard IP allowed) */
		"allowTcpFallbackRelay": true|false, /* Allow or disallow establishment of TCP relay connections (true by default) */
		"multipathMode": 0|1|2 /* multipath mode: none (0), random (1), proportional (2) */
	}
}

• trustedPathId: A trusted path is a physical network over which encryption and authentication are not required. This provides a performance boost but sacrifices all ZeroTier's security features when communicating over this path. Only use this if you know what you are doing and really need the performance! To set up a trusted path, all devices using it MUST have the same trusted path ID for the same network. Trusted path IDs are arbitrary positive non-zero integers. For example a group of devices on a LAN with IPs in 10.0.0.0/24 could use it as a fast trusted path if they all had the same trusted path ID of "25" defined for that network.

An example local.conf:

{
	"physical": {
		"10.0.0.0/24": {
			"blacklist": true
		},
		"10.10.10.0/24": {
			"trustedPathId": 101010024
		},
	},
	"virtual": {
		"feedbeef12": {
			"role": "UPSTREAM",
			"try": [ "10.10.20.1/9993" ],
			"blacklist": [ "192.168.0.0/24" ]
		}
	},
	"settings": {
		"softwareUpdate": "apply",
		"softwareUpdateChannel": "release"
	}
}

Network Virtualization Service API

The JSON API supports GET, POST/PUT, and DELETE. PUT is treated as a synonym for POST. Other methods including HEAD are not supported.

Values POSTed to the JSON API are extremely type sensitive. Things must be of the indicated type, otherwise they will be ignored or will generate an error. Anything quoted is a string so booleans and integers must lack quotes. Booleans must be true or false and nothing else. Integers cannot contain decimal points or they are floats (and vice versa). If something seems to be getting ignored or set to a strange value, or if you receive errors, check the type of all JSON fields you are submitting against the types listed below. Unrecognized fields in JSON objects are also ignored.

API requests must be authenticated via an authentication token. ZeroTier One saves this token in the authtoken.secret file in its working directory. This token may be supplied via the auth URL parameter (e.g. '?auth=...') or via the X-ZT1-Auth HTTP request header. Static UI pages are the only thing the server will allow without authentication.

A jsonp URL argument may be supplied to request JSONP encapsulation. A JSONP response is sent as a script with its JSON response payload wrapped in a call to the function name supplied as the argument to jsonp.

/status

• Purpose: Get running node status and addressing info
• Methods: GET
• Returns: { object }

Field	Type	Description	Writable
address	string	10-digit hex ZeroTier address of this node	no
publicIdentity	string	This node's ZeroTier identity.public	no
worldId	integer	ZeroTier world ID (never changes except for test)	no
worldTimestamp	integer	Timestamp of most recent world definition	no
online	boolean	If true at least one upstream peer is reachable	no
tcpFallbackActive	boolean	If true we are using slow TCP fallback	no
relayPolicy	string	Relay policy: ALWAYS, TRUSTED, or NEVER	no
versionMajor	integer	Software major version	no
versionMinor	integer	Software minor version	no
versionRev	integer	Software revision	no
version	string	major.minor.revision	no
clock	integer	Current system clock at node (ms since epoch)	no

/network

• Purpose: Get all network memberships
• Methods: GET
• Returns: [ {object}, ... ]

Getting /network returns an array of all networks that this node has joined. See below for network object format.

/network/<network ID>

• Purpose: Get, join, or leave a network
• Methods: GET, POST, DELETE
• Returns: { object }

To join a network, POST to it. Since networks have no mandatory writable parameters, POST data is optional and may be omitted. Example: POST to /network/8056c2e21c000001 to join the public "Earth" network. To leave a network, DELETE it e.g. DELETE /network/8056c2e21c000001.

Most network settings are not writable, as they are defined by the network controller.

Field	Type	Description	Writable
id	string	16-digit hex network ID	no
nwid	string	16-digit hex network ID (legacy field)	no
mac	string	MAC address of network device for this network	no
name	string	Short name of this network (from controller)	no
status	string	Network status (OK, ACCESS_DENIED, etc.)	no
type	string	Network type (PUBLIC or PRIVATE)	no
mtu	integer	Ethernet MTU	no
dhcp	boolean	If true, DHCP should be used to get IP info	no
bridge	boolean	If true, this device can bridge others	no
broadcastEnabled	boolean	If true ff:ff:ff:ff:ff:ff broadcasts work	no
portError	integer	Error code returned by underlying tap driver	no
netconfRevision	integer	Network configuration revision ID	no
assignedAddresses	[string]	Array of ZeroTier-assigned IP addresses (/bits)	no
routes	[object]	Array of ZeroTier-assigned routes (see below)	no
portDeviceName	string	Name of virtual network device (if any)	no
allowManaged	boolean	Allow IP and route management	yes
allowGlobal	boolean	Allow IPs and routes that overlap with global IPs	yes
allowDefault	boolean	Allow overriding of system default route	yes
allowDNS	boolean	Allow configuration of DNS on network	yes

Route objects:

Field	Type	Description	Writable
target	string	Target network / netmask bits	no
via	string	Gateway IP address (next hop) or null for LAN	no
flags	integer	Flags, currently always 0	no
metric	integer	Route metric (not currently used)	no

/peer

• Purpose: Get all peers
• Methods: GET
• Returns: [ {object}, ... ]

Getting /peer returns an array of peer objects for all current peers. See below for peer object format.

/peer/<address>

• Purpose: Get or set information about a peer
• Methods: GET, POST
• Returns: { object }

Field	Type	Description	Writable
address	string	10-digit hex ZeroTier address of peer	no
versionMajor	integer	Major version of remote (if known)	no
versionMinor	integer	Minor version of remote (if known)	no
versionRev	integer	Software revision of remote (if known)	no
version	string	major.minor.revision	no
latency	integer	Latency in milliseconds if known	no
role	string	LEAF, UPSTREAM, ROOT or PLANET	no
paths	[object]	Currently active physical paths (see below)	no

Path objects:

Field	Type	Description	Writable
address	string	Physical socket address e.g. IP/port	no
lastSend	integer	Time of last send through this path	no
lastReceive	integer	Time of last receive through this path	no
active	boolean	Is this path in use?	no
expired	boolean	Is this path expired?	no
preferred	boolean	Is this a current preferred path?	no
trustedPathId	integer	If nonzero this is a trusted path (unencrypted)	no