• What is Boundary: https://developer.hashicorp.com/boundary/docs/overview/what-is-boundary
• Website: https://www.boundaryproject.io/
• Forums: HashiCorp Discuss
• Documentation: https://boundaryproject.io/docs
• Tutorials: HashiCorp's Learn Platform

Boundary is an identity-aware proxy that provides a simple, secure way to access hosts and critical systems on your network.

With Boundary you can:

• Integrate with your IdP of choice using OpenID Connect, enabling users to securely sign-in to their Boundary environment
• Provide just-in-time network access to network resources, wherever they reside
• Manage session credentials via a native static credential store, or dynamically generate unique per-session credentials by integrating with HashiCorp Vault
• Automate discovery of new endpoints
• Manage privileged sessions using Boundary’s session controls
• Standardize your team's access workflow with a consistent experience for any type of infrastructure across any provider

Boundary is designed to be straightforward to understand, highly scalable, and resilient. It can run in clouds, on-prem, secure enclaves and more, and does not require an agent to be installed on every end host, making it suitable for access to managed/cloud services and container-based workflows in addition to traditional host systems and services.

For more information, refer to "What is Boundary?" on the Boundary website.

Boundary consists of two server components:

• Controller, which serves the API and coordinate session requests
• Workers, which perform session handling

A real-world Boundary installation will likely consist of one or more controllers paired with one or more workers. A single Boundary binary can act in either, or both, of these two modes.

Additionally, Boundary provides a Desktop client and CLI for end-users to request and establish authorized sessions to resources across a network.

Boundary does not require software to be installed on your hosts and services.

Boundary has two external dependencies:

• A SQL database
• At least one KMS

The database contains Boundary's configuration and session information. The controller nodes must be able to access the database.

Values that are secrets (e.g credentials) are encrypted in the database. Currently, PostgreSQL is supported as a database and has been tested with Postgres 12 and above.

Boundary uses only common extensions and both hosted and self-managed instances are supported. In most instances, all that you need is a database endpoint and the appropriate credentials.

Boundary uses KMS keys for various purposes, such as protecting secrets, authenticating workers, recovering data, encrypting values in Boundary’s configuration, and more. Boundary uses key derivation extensively to avoid key sprawl of these high-value keys.

You can use any cloud KMS or Vault's Transit Secrets Engine to satisfy the KMS requirement.

Running Boundary in a more permanent context requires a few more steps, such as writing some simple configuration files to tell the nodes how to reach their database and KMS. The steps below, along with the extra information needed for permanent installations, are detailed in our Installation Guide.

⚠️ Do not use the main branch except for dev or test cases. Boundary 0.10 introduced release branches which should be safe to track, however, migrations in main may be renumbered if needed. The Boundary team will not be able to provide assistance if running main over the long term results in migration breakages or other bugs.

Download the latest release of the server binary and appropriate desktop client(s) from our downloads page

Boundary has a dev mode that you can use for testing. In dev mode, you can start both a controller and worker with a single command, and they have the following properties:

• The controller starts a PostgreSQL Docker container to use as storage. This container will be shut down and removed, if possible, when the controller is shut down gracefully.
• The controller uses an internal KMS with ephemeral keys

If you meet the following local requirements, you can quickly get up and running with Boundary:

• Go v1.21 or greater
• Docker
• Either the Boundary UI dependencies for locally building the ui assets or gh cli for downloading pre-built ui assets.

Simply run:

make install

This will build Boundary. (The first time this is run it will fetch and compile UI assets; which will take a few extra minutes.) Once complete, run Boundary in dev mode:

$GOPATH/bin/boundary dev

Please note that development may require other tools; to install the set of tools at the versions used by the Boundary team, run:

make tools

Without doing so, you may encounter errors while running make install. It is important to also note that using make tools will install various tools used for Boundary development to the normal Go binary directory; this may overwrite or take precedence over tools that might already be installed on the system.

Start the server binary with:

boundary dev

This will start a Controller service listening on http://127.0.0.1:9200 for incoming API requests and a Worker service listening on http://127.0.0.1:9202 for incoming session requests. It will also create various default resources and display various useful pieces of information, such as a login name and password that can be used to authenticate.

For a simple test of Boundary in dev mode you don't generally need to configure any resources at all! But it's useful to understand what dev mode did for you so you can then take further steps. By default, dev mode will create:

• The global Scope for initial authentication, containing a Password-type Auth Method, along with an Account for login.
• An organization Scope under global, and a project Scope inside the organization.
• A Host Catalog with a default Host Set, which itself contains a Host with the address of the local machine (127.0.0.1)
• A Target mapping the Host Set to a set of connection parameters, with a default port of 22 (e.g. SSH)

You can go into Boundary's web UI or use its API to change these default values, for instance if you want to connect to a different host or need to modify the port on which to connect.

Next, let's actually make a connection to your local SSH daemon via Boundary:

1. Authenticate to Boundary; using default dev values, this would be boundary authenticate password -auth-method-id ampw_1234567890 -login-name admin -password password. (Note that if you do not include the password flag you will be prompted for it.)
2. Run boundary connect ssh -target-id ttcp_1234567890. If you want to adjust the username, pass -username <name> to the command.

Check out the possibilities for target configuration to test out limiting (or increasing) the number of connections per session or setting a maximum time limit; try canceling an active session from the sessions page or via boundary sessions, make your own commands with boundary connect -exec, and so on.

This example is a simple way to get started but omits several key steps that could be taken in a production context:

• Using a firewall or other means to restrict the set of hosts allowed to connect to a local service to only Boundary Worker nodes, thereby making Boundary the only means of ingress to a host
• Using the Boundary Terraform provider to easily integrate Boundary with your existing code-based infrastructure
• Pointing a BI tool (PowerBI, Tableau, etc.) at Boundary's data warehouse to generate insights and look for anomalies with respect to session access

Please note: We take Boundary's security and our users' trust very seriously. If you believe you have found a security issue in Boundary, please responsibly disclose by contacting us at security@hashicorp.com.

Thank you for your interest in contributing! Please refer to CONTRIBUTING.md for guidance.