OAuth2 Proxy

OAuth2 Proxy is a versatile authentication solution that brings OAuth2 and OpenID Connect authentication to web applications. Whether deployed as a standalone reverse proxy or integrated as middleware, it provides secure, standardized authentication while supporting a wide range of identity providers and deployment scenarios.

Key Features

• Comprehensive OAuth2/OIDC Support:

  • Full OAuth2 and OpenID Connect implementation
  • Support for authorization code flow
  • Token validation and refresh
  • Secure session management
  • PKCE (Proof Key for Code Exchange) support
  • JWT token handling

• Multiple Identity Provider Support:

  • Google OAuth integration
  • Microsoft Entra ID (Azure AD) support
  • GitHub OAuth authentication
  • Generic OIDC provider support
  • login.gov integration
  • Custom provider implementations

• Flexible Deployment Options:

  • Standalone reverse proxy mode
  • Middleware integration mode
  • Kubernetes ingress controller integration
  • Docker container deployment
  • Load balancer integration
  • Cloud-native architecture

• Advanced Authorization:

  • Email-based access control
  • Group and role-based authorization
  • Domain and organization restrictions
  • Custom authorization policies
  • Fine-grained permission control
  • Dynamic user validation

• Security Features:

  • Secure HTTP-only cookie management
  • CSRF protection mechanisms
  • TLS/SSL encryption support
  • Token encryption and signing
  • Session timeout management
  • Security header injection

• Request Processing:

  • HTTP header injection with user details
  • Username and group forwarding
  • Custom header configuration
  • Request path routing
  • Upstream service protection
  • API endpoint security

• Enterprise Features:

  • High availability support
  • Horizontal scaling capabilities
  • Comprehensive logging
  • Metrics and monitoring
  • Health check endpoints
  • Configuration management

Technical Specifications

• Language: Go
• Protocols: HTTP/1.1, HTTP/2, HTTPS, OAuth2, OIDC
• Platforms: Linux, Windows, macOS, Docker, Kubernetes
• License: MIT
• Package Formats: Binary, Docker, Helm charts
• Configuration: Command-line flags, environment variables, config files

Use Cases

• Web Application Protection: Securing web applications with OAuth2 authentication
• API Gateway Security: Protecting API endpoints with token validation
• Microservices Authentication: Centralized auth for microservice architectures
• Enterprise SSO: Single sign-on integration with corporate identity providers
• Development Environments: Secure access to development and staging services
• Multi-tenant Applications: Tenant-specific authentication and authorization

Unique Advantages

• Provider Flexibility: Support for multiple OAuth2 and OIDC providers
• Deployment Versatility: Works as standalone proxy or integrated middleware
• Enterprise Ready: Battle-tested with high availability and scaling features
• Community Driven: Active open-source community with regular updates
• Standards Compliant: Full OAuth2 and OIDC specification compliance
• Easy Integration: Simple integration with existing infrastructure

Based on the OAuth2 Proxy GitHub repository, this tool provides organizations with a robust, flexible authentication solution that can be easily integrated into existing infrastructure while supporting modern OAuth2 and OpenID Connect standards, making it ideal for securing web applications and APIs in both cloud and on-premises environments.