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Boundary (OSS Project)

Boundary is an open-source identity-based access management (identity and access) project that brokers authenticated, authorized access to infrastructure and applications without direct network exposure.

  • Identity-aware access proxy and session broker for infrastructure and applications (identity and access)
  • Just-in-time, credential-less access to hosts, services, and applications via session-based workflows (privileged access management)
  • Integration with existing identity providers and authentication methods for centralized access control (single sign-on / Identity Access Management (IAM))
  • Role- and attribute-based authorization with scoped resources and granular permissions (authorization and policy management)
  • Secure access workflows for remote users and automated systems without direct network-level connectivity (zero trust access)

More About Boundary (OSS Project)

Boundary is an open-source access management (identity and access) project from HashiCorp designed to provide authenticated, authorized access to infrastructure and applications without requiring users to connect directly to private networks. It focuses on identity-based access rather than traditional network location-based controls, aligning with zero trust access patterns in distributed and cloud environments.

The project addresses the problem of managing secure access for users, services, and automation workflows to infrastructure targets such as servers, databases, and internal applications (privileged access management). Instead of distributing long-lived credentials or opening network paths via VPNs or Secure Shell (SSH) bastions, Boundary brokers short-lived sessions to targets based on verified identity and policy.

Core capabilities include identity-aware session brokering, resource scoping, and policy-based authorization (authorization and policy management). Boundary introduces concepts such as organizations, projects, scopes, users, groups, roles, and targets, which together define who can access what resources and under which conditions. Access is granted via sessions that can be audited and revoked, rather than static keys or direct host credentials.

Boundary integrates with external identity providers and authentication mechanisms (single sign-on / IAM). It can connect to identity platforms such as enterprise Single Sign-On (SSO) or other OIDC-compliant providers, enabling centralized authentication while Boundary enforces authorization and session management. This separation of authentication from authorization allows enterprises to keep existing identity workflows while standardizing access policy enforcement at the Boundary layer.

For connectivity, Boundary operates as a proxy that terminates user or client connections and establishes outbound connections to targets (secure remote access). Users connect through Boundary using a client, Command-Line Interface (CLI), or UI, and Boundary then creates an authenticated session to internal endpoints without exposing those endpoints directly to public networks. This design is aligned with zero trust network access practices by avoiding blanket network-level access.

In enterprise environments, Boundary fits into security and platform architectures as part of access control for multi-cloud, hybrid, and on-premises (on-prem) infrastructure (infrastructure security). Platform and security teams can define logical projects and scopes mapped to business units or environments, manage role assignments, and configure targets such as databases, SSH hosts, or internal web applications. Audit logs and access records can be integrated into existing monitoring and compliance workflows.

Boundary is designed to interoperate with other HashiCorp tools and standard enterprise components (tooling ecosystem). It can be deployed alongside infrastructure automation and secrets management systems, where Boundary governs the user and machine access paths while other tools manage provisioning and secret storage. Its API-driven design supports automation for creating scopes, targets, and roles, allowing integration into platform pipelines and configuration-as-code practices.