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BUSINESS POSTURE

  • Business Priorities and Goals:
    • Provide a free and open-source internet speed testing tool.
    • Offer accurate and reliable speed test results to users.
    • Enable users to easily test their internet connection speed from any web browser.
    • Support various deployment options, including client-side only and with optional server-side components for advanced features or data collection.
    • Maintain a lightweight and efficient application to minimize resource usage.
  • Business Risks:
    • Inaccurate speed test results could damage user trust and the reputation of the tool.
    • Service unavailability due to technical issues or attacks could disrupt users and impact the tool's usability.
    • Data privacy breaches, especially if server-side components are used to collect and store user data (e.g., IP addresses, test results), could lead to legal and reputational damage.
    • Vulnerabilities in the application could be exploited by malicious actors for various purposes, including denial of service, data manipulation, or malware distribution.
    • Lack of updates and maintenance could lead to security vulnerabilities and decreased usability over time.

SECURITY POSTURE

  • Existing Security Controls:
    • security control: Open-source code, allowing for community review and identification of potential vulnerabilities. (Implemented: GitHub repository)
    • security control: Client-side implementation (HTML5/JavaScript) reduces server-side attack surface when deployed as a purely client-side application. (Implemented: Architecture design)
  • Accepted Risks:
    • accepted risk: Reliance on client-side security measures, which can be bypassed or manipulated by advanced users.
    • accepted risk: Potential vulnerabilities in third-party libraries used in client-side or server-side components.
    • accepted risk: Risk of denial-of-service attacks if server-side components are deployed and become publicly accessible.
  • Recommended Security Controls:
    • security control: Implement regular security scanning of both client-side and server-side code using SAST and DAST tools.
    • security control: Establish a process for security vulnerability reporting and patching.
    • security control: If server-side components are used, implement proper input validation and output encoding to prevent injection attacks.
    • security control: If user data is stored server-side, implement encryption at rest and in transit.
    • security control: Implement rate limiting and DDoS protection for server-side components.
    • security control: Conduct regular security audits and penetration testing, especially before major releases.
  • Security Requirements:
    • Authentication: Not applicable for the core speed test functionality as it is designed to be anonymous. If server-side components are extended for user accounts or administrative functions, authentication will be required.
    • Authorization: Not applicable for the core speed test functionality. If server-side components are extended for administrative functions, authorization will be required to control access to sensitive operations.
    • Input Validation: Implement input validation on both client-side and server-side (if used) to prevent injection attacks. Validate user inputs in configuration settings and any data submitted to server-side components.
    • Cryptography: Use HTTPS for all communication to protect data in transit. If server-side components store sensitive data, use encryption at rest. Consider using Content Security Policy (CSP) to mitigate cross-site scripting (XSS) attacks.

DESIGN

C4 CONTEXT

flowchart LR
    subgraph Internet
        A[/"User"/]
    end
    B[/"LibreSpeed Speedtest Application"/]
    C[/"Speedtest Servers (External)"/]
    D[/"Web Browser"/]
    E[/"Optional Backend Server"/]
    A --"Uses"--> D
    D --"Accesses"--> B
    B --"Communicates with"--> C
    B --"Optionally Communicates with"--> E
    style A fill:#f9f,stroke:#333,stroke-width:2px
    style B fill:#ccf,stroke:#333,stroke-width:2px
    style C fill:#ccf,stroke:#333,stroke-width:2px
    style D fill:#ccf,stroke:#333,stroke-width:2px
    style E fill:#ccf,stroke:#333,stroke-width:2px
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  • Context Diagram Elements:
      • Name: User
      • Type: Person
      • Description: End-user who wants to test their internet connection speed.
      • Responsibilities: Initiates speed test through a web browser. Views speed test results.
      • Security controls: Responsible for using a secure web browser and protecting their own device from malware.
      • Name: Web Browser
      • Type: Software System
      • Description: Web browser used by the user to access and run the LibreSpeed Speedtest Application.
      • Responsibilities: Renders the user interface of the speed test application. Executes JavaScript code. Communicates with the LibreSpeed Speedtest Application and external Speedtest Servers.
      • Security controls: Browser security features (e.g., sandboxing, Content Security Policy), user-installed browser extensions for security.
      • Name: LibreSpeed Speedtest Application
      • Type: Software System
      • Description: The web-based speed test application itself, consisting of HTML, CSS, and JavaScript code.
      • Responsibilities: Provides the user interface for initiating and displaying speed tests. Executes speed test logic in the browser. Communicates with external Speedtest Servers to perform actual speed measurements. Optionally communicates with a Backend Server for advanced features.
      • Security controls: Client-side security controls (e.g., input validation, CSP), HTTPS for communication.
      • Name: Speedtest Servers (External)
      • Type: Software System
      • Description: External servers used to perform the actual speed measurements (upload and download tests). These are typically publicly available servers.
      • Responsibilities: Receives requests from the LibreSpeed Speedtest Application. Performs speed measurements. Returns results to the LibreSpeed Speedtest Application.
      • Security controls: Server-side security controls implemented by the operators of these external servers, which are outside the control of the LibreSpeed project.
      • Name: Optional Backend Server
      • Type: Software System
      • Description: An optional server-side component (e.g., in PHP, Go, Node.js, Python) that can be deployed to provide additional features such as result storage, user accounts, or administrative functions.
      • Responsibilities: Handles optional server-side logic. May store speed test results or user data. May provide administrative interfaces.
      • Security controls: Server-side security controls (e.g., authentication, authorization, input validation, encryption, rate limiting, DDoS protection).

C4 CONTAINER

flowchart LR
    subgraph Internet
        A[/"User's Web Browser"/]
    end
    subgraph "LibreSpeed Speedtest Application"
        B[/"Web Server (e.g., Nginx, Apache)"/]
        C[/"Static Content"/]
        D[/"Backend Application Server (Optional)"/]
        E[/"Database (Optional)"/]
    end
    F[/"Speedtest Servers (External)"/]

    A --"HTTPS Requests"--> B
    B --"Serves Static Content"--> C
    B --"Forwards Requests (Optional)"--> D
    D --"Queries/Updates (Optional)"--> E
    C --"JavaScript/AJAX Calls"--> F
    C --"JavaScript/AJAX Calls (Optional)"--> D

    style A fill:#f9f,stroke:#333,stroke-width:2px
    style B fill:#ccf,stroke:#333,stroke-width:2px
    style C fill:#ccf,stroke:#333,stroke-width:2px
    style D fill:#ccf,stroke:#333,stroke-width:2px
    style E fill:#ccf,stroke:#333,stroke-width:2px
    style F fill:#ccf,stroke:#333,stroke-width:2px
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  • Container Diagram Elements:
      • Name: Web Server (e.g., Nginx, Apache)
      • Type: Container
      • Description: Serves static content (HTML, CSS, JavaScript) of the LibreSpeed Speedtest Application. Acts as the entry point for user requests. Can also act as a reverse proxy for the Backend Application Server if deployed.
      • Responsibilities: Serving static files. Handling HTTPS connections. Optionally forwarding requests to the Backend Application Server.
      • Security controls: HTTPS configuration, web server security hardening, access control to configuration files.
      • Name: Static Content
      • Type: Container
      • Description: Contains all the static files (HTML, CSS, JavaScript, images) that make up the client-side application. This is the core of the LibreSpeed Speedtest Application.
      • Responsibilities: Executing speed test logic in the browser. Rendering the user interface. Communicating with external Speedtest Servers and optionally with the Backend Application Server.
      • Security controls: Client-side input validation, Content Security Policy (CSP), Subresource Integrity (SRI) for external dependencies.
      • Name: Backend Application Server (Optional)
      • Type: Container
      • Description: An optional server-side application (e.g., PHP, Go, Node.js, Python) that provides additional features.
      • Responsibilities: Handling server-side logic for optional features (e.g., result storage, user management). Interacting with the Database if used.
      • Security controls: Server-side input validation, output encoding, authentication, authorization, secure coding practices, protection against injection attacks, rate limiting.
      • Name: Database (Optional)
      • Type: Container
      • Description: An optional database to store data, such as speed test results or user information, if the Backend Application Server is used and requires data persistence.
      • Responsibilities: Storing and retrieving data for the Backend Application Server.
      • Security controls: Database access control, encryption at rest, regular backups, database security hardening.
      • Name: Speedtest Servers (External)
      • Type: External System
      • Description: External servers used for actual speed measurements.
      • Responsibilities: Performing speed measurements as requested by the client-side application.
      • Security controls: Security controls are managed by the operators of these external servers.

DEPLOYMENT

Deployment Solution: Docker Container on Cloud Platform (e.g., AWS, GCP, Azure)

flowchart LR
    subgraph "Cloud Platform (e.g., AWS)"
        subgraph "Virtual Network"
            subgraph "Public Subnet"
                A[/"Load Balancer"/]
                B[/"Web Server Instance (Docker Container)"/]
            end
            subgraph "Private Subnet (Optional)"
                C[/"Backend App Server Instance (Docker Container)"/]
                D[/"Database Instance (Optional)"/]
            end
        end
    end
    E[/"Internet"/]
    F[/"Speedtest Servers (External)"/]

    E --"HTTPS Requests"--> A
    A --"Forwards Requests"--> B
    B --"Serves Static Content"--> E
    B --"Forwards Requests (Optional)"--> C
    C --"Queries/Updates (Optional)"--> D
    B --"JavaScript/AJAX Calls"--> F
    E --"JavaScript/AJAX Calls"--> B

    style A fill:#ccf,stroke:#333,stroke-width:2px
    style B fill:#ccf,stroke:#333,stroke-width:2px
    style C fill:#ccf,stroke:#333,stroke-width:2px
    style D fill:#ccf,stroke:#333,stroke-width:2px
    style E fill:#f9f,stroke:#333,stroke-width:2px
    style F fill:#ccf,stroke:#333,stroke-width:2px
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  • Deployment Diagram Elements:
      • Name: Load Balancer
      • Type: Infrastructure
      • Description: Distributes incoming HTTPS traffic across Web Server Instances. Provides high availability and scalability.
      • Responsibilities: Load balancing, SSL termination, traffic routing.
      • Security controls: DDoS protection, SSL/TLS configuration, access control policies.
      • Name: Web Server Instance (Docker Container)
      • Type: Infrastructure, Container
      • Description: A virtual machine or container instance running a Web Server (e.g., Nginx) and serving the static content of the LibreSpeed Speedtest Application. Deployed as a Docker container for consistency and ease of deployment.
      • Responsibilities: Serving static content, handling web requests, optionally forwarding requests to the Backend App Server.
      • Security controls: Container security hardening, OS security hardening, web server security configuration, regular patching.
      • Name: Backend App Server Instance (Docker Container) (Optional)
      • Type: Infrastructure, Container
      • Description: A virtual machine or container instance running the optional Backend Application Server. Deployed in a private subnet for enhanced security.
      • Responsibilities: Handling server-side logic, interacting with the Database.
      • Security controls: Container security hardening, OS security hardening, application server security configuration, network segmentation, access control policies.
      • Name: Database Instance (Optional)
      • Type: Infrastructure
      • Description: A managed database service (e.g., AWS RDS, GCP Cloud SQL, Azure SQL Database) or a database instance running on a virtual machine. Deployed in a private subnet for enhanced security.
      • Responsibilities: Data storage and retrieval.
      • Security controls: Database access control, encryption at rest and in transit, regular backups, database security hardening, network segmentation.

BUILD

flowchart LR
    A[/"Developer"/] --> B{/"Code Changes"/}
    B --> C[/"GitHub Repository"/]
    C --> D[/"GitHub Actions (CI/CD)"/]
    D --> E{/"Build Process"/}
    E -- "Static Analysis (SAST)" --> E
    E -- "Linters" --> E
    E --> F[/"Build Artifacts (Docker Image, Static Files)"/]
    F --> G[/"Container Registry (Optional)"/]
    G --> H[/"Deployment Pipeline"/]
    H --> I[/"Deployment Environment"/]

    style A fill:#f9f,stroke:#333,stroke-width:2px
    style B fill:#ccf,stroke:#333,stroke-width:2px
    style C fill:#ccf,stroke:#333,stroke-width:2px
    style D fill:#ccf,stroke:#333,stroke-width:2px
    style E fill:#ccf,stroke:#333,stroke-width:2px
    style F fill:#ccf,stroke:#333,stroke-width:2px
    style G fill:#ccf,stroke:#333,stroke-width:2px
    style H fill:#ccf,stroke:#333,stroke-width:2px
    style I fill:#ccf,stroke:#333,stroke-width:2px
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  • Build Process Elements:
      • Name: Developer
      • Type: Person
      • Description: Software developer who writes and modifies the code for the LibreSpeed Speedtest Application.
      • Responsibilities: Writing code, committing changes to the repository, performing local testing.
      • Security controls: Secure coding practices, code review, local development environment security.
      • Name: Code Changes
      • Type: Data
      • Description: Modifications to the source code of the application.
      • Responsibilities: Representing the changes made by developers.
      • Security controls: Version control (Git), code review process.
      • Name: GitHub Repository
      • Type: Software System
      • Description: Central repository for storing and managing the source code.
      • Responsibilities: Version control, code storage, collaboration.
      • Security controls: Access control, branch protection, audit logs.
      • Name: GitHub Actions (CI/CD)
      • Type: Software System
      • Description: Automated CI/CD platform used to build, test, and deploy the application.
      • Responsibilities: Build automation, testing, deployment pipeline.
      • Security controls: Secure pipeline configuration, secret management, access control, audit logs.
      • Name: Build Process
      • Type: Process
      • Description: Automated process of compiling, testing, and packaging the application. Includes steps like static analysis (SAST), linting, and building Docker images (if applicable).
      • Responsibilities: Code compilation, static analysis, linting, unit testing, integration testing, building artifacts.
      • Security controls: SAST tools, linters, dependency scanning, secure build environment, artifact signing.
      • Name: Build Artifacts (Docker Image, Static Files)
      • Type: Data
      • Description: Output of the build process, including Docker images (if used for server-side components) and static files (HTML, CSS, JavaScript).
      • Responsibilities: Deployable units of the application.
      • Security controls: Artifact signing, vulnerability scanning of Docker images.
      • Name: Container Registry (Optional)
      • Type: Software System
      • Description: Registry for storing and managing Docker images. Used if Docker is used for deployment.
      • Responsibilities: Storing and distributing Docker images.
      • Security controls: Access control, vulnerability scanning, image signing.
      • Name: Deployment Pipeline
      • Type: Process
      • Description: Automated process for deploying build artifacts to the target environment.
      • Responsibilities: Deploying application to different environments (e.g., staging, production).
      • Security controls: Secure deployment process, infrastructure as code, environment segregation, rollback mechanisms.
      • Name: Deployment Environment
      • Type: Environment
      • Description: Target infrastructure where the application is deployed and running (e.g., cloud platform, on-premises servers).
      • Responsibilities: Hosting and running the application.
      • Security controls: Infrastructure security, network security, access control, monitoring, incident response.

RISK ASSESSMENT

  • Critical Business Processes:
    • Providing accurate internet speed test results to users.
    • Maintaining the availability and accessibility of the speed test application.
  • Data to Protect and Sensitivity:
    • User IP Addresses (if logged by optional backend): Low to Medium sensitivity. IP addresses can be considered personal data in some jurisdictions.
    • Speed Test Results (if stored by optional backend): Low sensitivity. Aggregated results might be more sensitive depending on the context.
    • Application Code and Infrastructure: High sensitivity. Compromise could lead to service disruption, data breaches, or malware distribution.

QUESTIONS & ASSUMPTIONS

  • Questions:
    • Is there a plan to implement server-side components for data collection or advanced features in the future?
    • What is the expected scale and user base for the application?
    • Are there any specific regulatory compliance requirements (e.g., GDPR, CCPA) that need to be considered?
    • What is the process for handling security vulnerabilities reported by the community?
  • Assumptions:
    • The primary goal is to provide a free and open-source speed test tool for general public use.
    • The application is intended to be lightweight and efficient.
    • Security is a concern, but performance and ease of use are also important priorities.
    • Deployment will likely be on standard web hosting or cloud platforms.
    • The project will be maintained by a community of developers.