teleport

README

Gravitational Teleport

Project Links	Description
Teleport Website	The official website of the project
Documentation	Admin guide, user manual and more
Demo Video	3-minute video overview of the UI.
Teleconsole	The free service to "invite" SSH clients behind NAT, built on top of Teleport
Blog	Our blog where we publish Teleport news

Introduction

Gravitational Teleport is a modern SSH server for remotely accessing clusters of Linux servers via SSH or HTTPS. It is intended to be used instead of sshd. Teleport enables teams to easily adopt the best SSH practices like:

• No need to distribute keys: Teleport uses certificate-based access with automatic expiration time.
• Enforcement of 2nd factor authentication.
• Cluster introspection: every Teleport node becomes a part of a cluster and is visible on the Web UI.
• Record and replay SSH sessions for knowledge sharing and auditing purposes.
• Collaboratively troubleshoot issues through session sharing.
• Connect to clusters located behind firewalls without direct Internet access via SSH bastions.
• Ability to integrate SSH credentials with your organization identities via OAuth (Google Apps, Github).
• Keep the full audit log of all SSH sessions within a cluster.

Teleport is built on top of the high-quality Golang SSH implementation and it is fully compatible with OpenSSH.

Installing and Running

Download the latest binary release, unpack the .tar.gz and run sudo make install. This will copy Teleport binaries into /usr/local/bin.

Then you can run Teleport as a single-node cluster:

$ sudo teleport start 

In production, Teleport must run as root. But to play, just do chown $USER /var/lib/teleport and run it under $USER, in this case you will not be able to login as someone else though.

Building Teleport

Teleport source code consists of the actual Teleport daemon binary written in Golang, and also it has a web UI (located in /web directory) written in Javascript. The WebUI is not changed often and we keep it checked into Git under /dist, so you only need to build Golang:

Make sure you have Golang v1.7 or newer, then run:

# getting & building:
$ go get github.com/gravitational/teleport
$ cd $GOPATH/src/github.com/gravitational/teleport
$ make

# create the default data directory before starting:
$ sudo mkdir -p /var/lib/teleport
$ sudo chown $USER /var/lib/teleport

If the build was successful the binaries will be in $GOPATH/src/github.com/gravitational/teleport/build

By default the web UI is not build into the binary, to run self-build teleport you have to set the environment variable: DEBUG=1, in debug mode the web UI will be loaded from web/dist directory.

Then you can run Teleport as a single-node cluster in development mode:

$ DEBUG=1 build/teleport start -d

To build the binary with embedded web assets:

$ make release
$ build/teleport start -d

If you want to release your own Teleport version, edit this Makefile, update VERSION and SUFFIX constants, then run make setver to update version.go

If you want to cut another binary release tarball, run make release.

NOTE: The Go compiler is somewhat sensitive to amount of memory: you will need at least 1GB of virtual memory to compile Teleport. 512MB instance without swap will not work.

Rebuilding Web UI

If you want to make changes to the web UI, you have to re-build the content of /dist directory See web/README.md for instructions on how to update the Web UI.

Why did We Build Teleport?

Mature tech companies with significant infrastructure footprints tend to implement most of these patterns internally. Teleport allows smaller companies without significant in-house SSH expertise to easily adopt them, as well. Teleport comes with an accessible Web UI and a very permissive Apache 2.0 license to facilitate adoption and use.

Being a complete standalone tool, Teleport can be used as a software library enabling trust management in complex multi-cluster, multi-region scenarios across many teams within multiple organizations.

More Information

• Quick Start Guide
• Teleport Architecture
• Admin Manual
• User Manual
• FAQ

Contributing

The best way to contribute is to create issues or pull requests right here on Github. You can also reach the Gravitational team through their website

Status

Teleport has completed a security audit from a nationally recognized technology security company. So we are comfortable with the use of Teleport from a security perspective.

However, Teleport is still a relatively young product so you may experience usability issues. We are actively supporting Teleport and addressing any issues that are submitted to this repo. Ask questions, send pull requests, report issues and don't be shy! :)

The latest stable Teleport build can be found in Releases

Known Issues

• Teleport does not officially support IPv6 yet.

Who Built Teleport?

Teleport was created by Gravitational Inc. We have built Teleport by borrowing from our previous experiences at Rackspace. It has been extracted from Gravity, our system for helping our clients to deploy and remotely manage their SaaS applications on many cloud regions or even on-premise.

Documentation

Overview

Gravitational Teleport is a modern SSH server for remotely accessing clusters of Linux servers via SSH or HTTPS. It is intended to be used instead of sshd.

Teleport enables teams to easily adopt the best SSH practices like:

• No need to distribute keys: Teleport uses certificate-based access with automatic expiration time.
• Enforcement of 2nd factor authentication.
• Cluster introspection: every Teleport node becomes a part of a cluster and is visible on the Web UI.
• Record and replay SSH sessions for knowledge sharing and auditing purposes.
• Collaboratively troubleshoot issues through session sharing.
• Connect to clusters located behind firewalls without direct Internet access via SSH bastions.
• Ability to integrate SSH credentials with your organization identities via OAuth (Google Apps, Github).
• Keep the full audit log of all SSH sessions within a cluster.

Teleport web site:

https://gravitational.com/teleport/

Teleport on Github:

https://github.com/gravitational/teleport

Index

• Constants
• Variables
• type BuiltinRole
• type LocalUser
• type RemoteUser
• type Role
  • func (r *Role) Check() error
  • func (r *Role) Set(v string) error
  • func (r *Role) String() string
• type Roles
  • func ParseRoles(str string) (roles Roles, err error)
  • func (roles Roles) Check() (err error)
  • func (roles Roles) Equals(other Roles) bool
  • func (roles Roles) Include(role Role) bool
  • func (roles Roles) String() string

Constants

const (
	// SSHAuthSock is the environment variable pointing to the
	// Unix socket the SSH agent is running on.
	SSHAuthSock = "SSH_AUTH_SOCK"
	// SSHAgentPID is the environment variable pointing to the agent
	// process ID
	SSHAgentPID = "SSH_AGENT_PID"

	// SSHTeleportUser is the current Teleport user that is logged in.
	SSHTeleportUser = "SSH_TELEPORT_USER"

	// SSHSessionWebproxyAddr is the address the web proxy.
	SSHSessionWebproxyAddr = "SSH_SESSION_WEBPROXY_ADDR"

	// SSHTeleportClusterName is the name of the cluster this node belongs to.
	SSHTeleportClusterName = "SSH_TELEPORT_CLUSTER_NAME"

	// SSHTeleportHostUUID is the UUID of the host.
	SSHTeleportHostUUID = "SSH_TELEPORT_HOST_UUID"

	// SSHSessionID is the UUID of the current session.
	SSHSessionID = "SSH_SESSION_ID"
)

const (
	// TOTPValidityPeriod is the number of seconds a TOTP token is valid.
	TOTPValidityPeriod uint = 30

	// TOTPSkew adds that many periods before and after to the validity window.
	TOTPSkew uint = 1
)

const (
	// Component indicates a component of teleport, used for logging
	Component = "component"

	// ComponentFields stores component-specific fields
	ComponentFields = "fields"

	// ComponentReverseTunnel is reverse tunnel agent and server
	// that together establish a bi-directional SSH revers tunnel
	// to bypass firewall restrictions
	ComponentReverseTunnel = "reversetunnel"

	// ComponentAuth is the cluster CA node (auth server API)
	ComponentAuth = "auth"

	// ComponentNode is SSH node (SSH server serving requests)
	ComponentNode = "node"

	// ComponentProxy is SSH proxy (SSH server forwarding connections)
	ComponentProxy = "proxy"

	// ComponentTunClient is a tunnel client
	ComponentTunClient = "tunclient"

	// DebugEnvVar tells tests to use verbose debug output
	DebugEnvVar = "DEBUG"

	// VerboseLogEnvVar forces all logs to be verbose (down to DEBUG level)
	VerboseLogsEnvVar = "TELEPORT_DEBUG"

	// DefaultTerminalWidth defines the default width of a server-side allocated
	// pseudo TTY
	DefaultTerminalWidth = 80

	// DefaultTerminalHeight defines the default height of a server-side allocated
	// pseudo TTY
	DefaultTerminalHeight = 25

	// SafeTerminalType is the fall-back TTY type to fall back to (when $TERM
	// is not defined)
	SafeTerminalType = "xterm"

	// ConnectorOIDC means connector type OIDC
	ConnectorOIDC = "oidc"

	// DataDirParameterName is the name of the data dir configuration parameter passed
	// to all backends during initialization
	DataDirParameterName = "data_dir"

	// SSH request type to keep the connection alive. A client and a server keep
	// pining each other with it:
	KeepAliveReqType = "keepalive@openssh.com"

	// OTP means One-time Password Algorithm for Two-Factor Authentication.
	OTP = "otp"

	// TOTP means Time-based One-time Password Algorithm. for Two-Factor Authentication.
	TOTP = "totp"

	// HOTP means HMAC-based One-time Password Algorithm.for Two-Factor Authentication.
	HOTP = "hotp"

	// U2F means Universal 2nd Factor.for Two-Factor Authentication.
	U2F = "u2f"

	// OFF means no second factor.for Two-Factor Authentication.
	OFF = "off"

	// Local means authentication will happen locally within the Teleport cluster.
	Local = "local"

	// OIDC means authentication will happen remotly using an OIDC connector.
	OIDC = "oidc"
)

const (
	// AuthorizedKeys are public keys that check against User CAs.
	AuthorizedKeys = "authorized_keys"
	// KnownHosts are public keys that check against Host CAs.
	KnownHosts = "known_hosts"
)

const (
	// CertExtensionPermitAgentForwarding allows agent forwarding for certificate
	CertExtensionPermitAgentForwarding = "permit-agent-forwarding"
	// CertExtensionPermitPTY allows user to request PTY
	CertExtensionPermitPTY = "permit-pty"
	// CertExtensionPermitPortForwarding allows user to request port forwarding
	CertExtensionPermitPortForwarding = "permit-port-forwarding"
)

const ContextUser = "teleport-user"

ContextUser is a user set in the context of the request

const ForeverTTL time.Duration = 0

ForeverTTL means that object TTL will not expire unless deleted

const (
	Version = "2.0.3"
)

const WebAPIVersion = "v1"

WebAPIVersion is a current webapi version

Variables

var Gitref string

Gitref variable is automatically set to the output of git-describe during the build process

Types

type BuiltinRole

type BuiltinRole struct {
	// Role is the builtin role this username is associated with
	Role Role
}

BuiltinRole is monitoring

type LocalUser

type LocalUser struct {
	// Username is local username
	Username string
}

LocalUsername is a local username

type RemoteUser

type RemoteUser struct {
	// Username is a name of the remote user
	Username string `json:"username"`
	// ClusterName is a name of the remote cluster
	// of the user
	ClusterName string `json:"cluster_name"`
}

RemoteUser defines encoded remote user

type Role

type Role string

Role identifies the role of an SSH connection. Unlike "user roles" introduced as part of RBAC in Teleport 1.4+ these are built-in roles used for different Teleport components when connecting to each other.

const (
	// RoleAuth is for teleport auth server (authority, authentication and authorization)
	RoleAuth Role = "Auth"
	// RoleWeb is for web access users
	RoleWeb Role = "Web"
	// RoleNode is a role for SSH node in the cluster
	RoleNode Role = "Node"
	// RoleProxy is a role for SSH proxy in the cluster
	RoleProxy Role = "Proxy"
	// RoleAdmin is admin role
	RoleAdmin Role = "Admin"
	// RoleProvisionToken is a role for nodes authenticated using provisioning tokens
	RoleProvisionToken Role = "ProvisionToken"
	// RoleTrustedCluster is a role needed for tokens used to add trusted clusters.
	RoleTrustedCluster Role = "Trustedcluster"
	// RoleSignup is for first time signing up users
	RoleSignup Role = "Signup"
	// RoleNop is used for actions that already using external authz mechanisms
	// e.g. tokens or passwords
	RoleNop Role = "Nop"
)

func (*Role) Check

func (r *Role) Check() error

Check checks if this a a valid role value, returns nil if it's ok, false otherwise

func (*Role) Set

func (r *Role) Set(v string) error

Set sets the value of the role from string, used to integrate with CLI tools

func (*Role) String

func (r *Role) String() string

String returns debug-friendly representation of this role

type Roles

type Roles []Role

func ParseRoles

func ParseRoles(str string) (roles Roles, err error)

ParseRoles takes a comma-separated list of roles and returns a slice of roles, or an error if parsing failed

func (Roles) Check

func (roles Roles) Check() (err error)

Check returns an error if the role set is incorrect (contains unknown roles)

func (Roles) Equals

func (roles Roles) Equals(other Roles) bool

Equals compares two sets of roles

func (Roles) Include

func (roles Roles) Include(role Role) bool

Includes returns 'true' if a given list of roles includes a given role

func (Roles) String

func (roles Roles) String() string