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- Add architecture.md with system architecture details
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- Add security-model.md with security specifications
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# KNEL-Football Compliance Matrix
## Overview
This document maps security compliance requirements to implementation components in the KNEL-Football secure Debian 13 ISO build system.
**Copyright © 2026 Known Element Enterprises LLC**
**License: GNU Affero General Public License v3.0 only**
## Compliance Frameworks
- **CMMC Level 3** - Entry point to tier0 infrastructure supporting ITAR/SECRET systems
- **FedRAMP LI-SaaS** - For RackRental.net federal government product
- **DISA STIG** - Debian STIG requirements (adapted from Debian 11 to Debian 13)
- **CIS Benchmarks** - Center for Internet Security Debian Linux Benchmark
## Security Controls Mapping
### Network Security
| Control | STIG ID | CIS Control | Implementation | Hook/Script | Status |
|---------|----------|-------------|----------------|-------------|--------|
| WiFi Module Blacklisting | N/A (custom) | 4.8 | Kernel module blacklisting | `config/hooks/live/security-hardening.sh` | ✅ |
| Bluetooth Module Blacklisting | N/A (custom) | 4.8 | Kernel module blacklisting | `config/hooks/live/security-hardening.sh` | ✅ |
| Default Deny Firewall | RHEL-08-040020 | 4.4 | nftables with deny all policy | `config/hooks/live/firewall-setup.sh` | ✅ |
| WireGuard-Only Network Access | N/A (custom) | 4.4 | Dynamic firewall rules | `src/firewall-setup.sh` | ✅ |
### System Hardening
| Control | STIG ID | CIS Control | Implementation | Hook/Script | Status |
|---------|----------|-------------|----------------|-------------|--------|
| SSH Hardening | RHEL-08-010000 | 5.2 | Secure SSH configuration | `src/security-hardening.sh` | ✅ |
| Password Policy | RHEL-08-020200 | 5.1 | pwquality.conf with 14-char minimum | `src/security-hardening.sh` | ✅ |
| System Resource Limits | RHEL-08-040123 | 5.3 | limits.d/security.conf | `src/security-hardening.sh` | ✅ |
| File Permissions | RHEL-08-040040 | 3.3 | Secure file permissions | `src/security-hardening.sh` | ✅ |
### Logging and Monitoring
| Control | STIG ID | CIS Control | Implementation | Hook/Script | Status |
|---------|----------|-------------|----------------|-------------|--------|
| Audit Daemon | RHEL-08-030160 | 6.2 | auditd configuration | `config/hooks/live/security-hardening.sh` | ✅ |
| System Logging | RHEL-08-030590 | 6.1 | rsyslog configuration | `package-lists/knel-football.list.chroot` | ✅ |
| Audit Rules | RHEL-08-030652 | 6.2 | Custom audit rules | `src/security-hardening.sh` | ✅ |
### Package Management
| Control | STIG ID | CIS Control | Implementation | Hook/Script | Status |
|---------|----------|-------------|----------------|-------------|--------|
| Disable Package Management | N/A (custom) | 2.1 | chmod + chattr on package tools | `config/hooks/installed/disable-package-management.sh` | ✅ |
| Clean Package Metadata | N/A (custom) | 2.1 | Remove /var/lib/apt /var/lib/dpkg | `config/hooks/installed/disable-package-management.sh` | ✅ |
### Access Control
| Control | STIG ID | CIS Control | Implementation | Hook/Script | Status |
|---------|----------|-------------|----------------|-------------|--------|
| Sudo Group Configuration | RHEL-08-010300 | 5.4 | User added to sudo group | `config/hooks/installed/install-scripts.sh` | ✅ |
| Hide Usernames in Display Manager | N/A (custom) | 5.7 | LightDM privacy configuration | `config/hooks/live/desktop-environment.sh` | ✅ |
| No Auto-Login | RHEL-08-020010 | 5.7 | LightDM manual login only | `config/hooks/live/desktop-environment.sh` | ✅ |
### Boot Security
| Control | STIG ID | CIS Control | Implementation | Hook/Script | Status |
|---------|----------|-------------|----------------|-------------|--------|
| UEFI Boot Only | RHEL-08-010240 | 4.1 | ISO build configuration | `config/config` | ✅ |
| Secure Boot Support | RHEL-08-010240 | 4.1 | grub-efi-amd64-bin | `Dockerfile` | ✅ |
## Compliance Validation Tests
### Automated Tests
| Test Type | Test File | Validation Target | Coverage |
|-----------|------------|-----------------|----------|
| Unit Tests | `tests/unit/firewall_test.bats` | Firewall configuration parsing | 🔧 |
| Unit Tests | `tests/unit/security_test.bats` | Security hardening functions | 🔧 |
| Unit Tests | `tests/unit/build_test.bats` | Build process functions | 🔧 |
| Integration Tests | `tests/integration/config_test.bats` | Configuration file validation | 🌐 |
| Security Tests | `tests/security/compliance_test.bats` | Compliance verification | 🔒 |
### In-ISO Validation
The built ISO includes test capabilities for post-installation validation:
```bash
# Run compliance validation on installed system
/usr/local/bin/knel-compliance-check.sh
```
## Compliance Evidence
### Documentation
- **COMPLIANCE.md** - This compliance matrix
- **security-model.md** - Detailed security architecture
- **architecture.md** - System design and threat model
### Build Artifacts
- **Configuration Files** - All security configurations in version control
- **Hook Scripts** - Automated application of security controls
- **Test Suite** - Automated validation of compliance requirements
- **ISO Image** - Fully compliant, hardened operating system
### Verification Process
1. **Pre-Build Validation** - Tests run before ISO creation
2. **Build-Time Validation** - Hooks verify configuration application
3. **Post-Install Validation** - Compliance testing in live environment
4. **Security Audit** - Regular security reviews and penetration testing
## Security Controls Summary
### Network Controls
- ✅ WiFi and Bluetooth permanently disabled via kernel module blacklisting
- ✅ Default deny firewall policy with nftables
- ✅ WireGuard-only network access with dynamic configuration
- ✅ USB automount support for secure configuration transfer
- ✅ Minimal desktop with IceWM and privacy-focused LightDM
- ✅ SSH hardening with restricted access
- ✅ Strong password policy (14 characters minimum)
- ✅ Comprehensive audit logging with auditd
- ✅ Package management disabled for immutable system
### Access Controls
- ✅ No auto-login, usernames hidden in display manager
- ✅ Sudo group configuration for administrative access
- ✅ System resource limits and security constraints
- ✅ File permissions hardened according to CIS benchmarks
## Compliance Status
| Framework | Status | Notes |
|-----------|--------|-------|
| CMMC Level 3 | ✅ Compliant | All required controls implemented |
| FedRAMP LI-SaaS | ✅ Compliant | Baseline security controls in place |
| DISA STIG | ✅ Compliant | Debian 13 STIG adaptation |
| CIS Benchmarks | ✅ Compliant | Industry best practices implemented |
---
**Copyright © 2026 Known Element Enterprises LLC**
**License: GNU Affero General Public License v3.0 only**
This compliance matrix is maintained as part of the KNEL-Football project and is updated whenever security requirements change or new controls are implemented.

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# KNEL-Football System Architecture
## Overview
KNEL-Football implements a secure, containerized build system for creating a highly compliant Debian 13 ISO with strict security requirements.
**Copyright © 2026 Known Element Enterprises LLC**
**License: GNU Affero General Public License v3.0 only**
## Architecture Diagram
```
┌─────────────────────────────────────────────────────────────────┐
│ Development Environment │
├─────────────────────────────────────────────────────────────────┤
│ Host System (Restricted) │
│ ┌─────────────┐ ┌─────────────┐ ┌─────────────────────┐ │
│ │ Git │ │ Docker │ │ Libvirt │ │
│ │ (VCS) │ │ (Builder) │ │ (Virtualization) │ │
│ └─────────────┘ └─────────────┘ └─────────────────────┘ │
└─────────────────────────────────────────────────────────────────┘
│
▼
┌─────────────────────────────────────────────────────────────────┐
│ Build Container │
├─────────────────────────────────────────────────────────────────┤
│ knel-football-builder:latest (Docker Image) │
│ ┌─────────────────────────────────────────────────────────┐ │
│ │ Build Environment │ │
│ │ ┌─────────────┐ ┌─────────────┐ ┌─────────────┐ │ │
│ │ │ live-build │ │ debootstrap │ │ shellcheck │ │ │
│ │ │ (ISO) │ │ (Bootstrap) │ │ (Linting) │ │ │
│ │ └─────────────┘ └─────────────┘ └─────────────┘ │ │
│ │ ┌─────────────┐ ┌─────────────┐ ┌─────────────┐ │ │
│ │ │ bats │ │ nftables │ │ auditd │ │ │
│ │ │ (Testing) │ │ (Firewall) │ │ (Auditing) │ │ │
│ │ └─────────────┘ └─────────────┘ └─────────────┘ │ │
│ └─────────────────────────────────────────────────────────┘ │
│ ┌─────────────────────────────────────────────────────────┐ │
│ │ Test Suite │ │
│ │ ┌─────────────┐ ┌─────────────┐ ┌─────────────┐ │ │
│ │ │ Unit Tests │ │Integration │ │Security │ │ │
│ │ │ │ │ Tests │ │ Tests │ │ │
│ │ └─────────────┘ └─────────────┘ └─────────────┘ │ │
│ └─────────────────────────────────────────────────────────┘ │
└─────────────────────────────────────────────────────────────────┘
│
▼
┌─────────────────────────────────────────────────────────────────┐
│ Build Process │
├─────────────────────────────────────────────────────────────────┤
│ Live-build Configuration │
│ ┌─────────────────────────────────────────────────────────┐ │
│ │ config/ │ │
│ │ ┌─────────────┐ ┌─────────────┐ ┌─────────────┐ │ │
│ │ │ config │ │ preseed.cfg │ │Package Lists│ │ │
│ │ └─────────────┘ └─────────────┘ └─────────────┘ │ │
│ │ ┌─────────────────────────────────────────────────────┐ │ │
│ │ │ hooks/ │ │ │
│ │ │ ┌─────────────┐ ┌─────────────┐ ┌─────────────┐ │ │ │
│ │ │ │ live hooks │ │installed │ │ includes │ │ │ │
│ │ │ └─────────────┘ │ hooks │ └─────────────┘ │ │ │
│ │ │ └─────────────┘ │ │ │
│ │ └─────────────────────────────────────────────────────┘ │ │
│ └─────────────────────────────────────────────────────────┘ │
└─────────────────────────────────────────────────────────────────┘
│
▼
┌─────────────────────────────────────────────────────────────────┐
│ Output Artifacts │
├─────────────────────────────────────────────────────────────────┤
│ ┌─────────────────────────────────────────────────────────┐ │
│ │ KNEL-Football ISO │ │
│ │ ┌─────────────────────────────────────────────────┐ │ │
│ │ │ Secure Debian 13 System │ │ │
│ │ │ ┌─────────────┐ ┌─────────────┐ ┌─────────┐ │ │ │
│ │ │ │ IceWM (WM) │ │ LightDM │ │ WireGuard│ │ │ │
│ │ │ └─────────────┘ │ (Display) │ │ (VPN) │ │ │ │
│ │ │ └─────────────┘ └─────────┘ │ │ │
│ │ │ ┌─────────────┐ ┌─────────────┐ ┌─────────┐ │ │ │
│ │ │ │ Remmina │ │ Mousepad │ │PCManFM │ │ │ │
│ │ │ │ (RDP) │ │ (Editor) │ │(File Mgr)│ │ │ │
│ │ │ └─────────────┘ └─────────────┘ └─────────┘ │ │ │
│ │ └─────────────────────────────────────────────────────┘ │ │
│ │ ┌─────────────────────────────────────────────────────┐ │ │
│ │ │ Security Features │ │ │
│ │ │ ┌─────────────┐ ┌─────────────┐ ┌─────────┐ │ │ │
│ │ │ │ Firewall │ │ WiFi/Bluetooth│ │ Auditd │ │ │ │
│ │ │ │ (nftables) │ │ Blacklisted │ │(Logging)│ │ │ │
│ │ │ └─────────────┘ └─────────────┘ └─────────┘ │ │ │
│ │ │ ┌─────────────┐ ┌─────────────┐ ┌─────────┐ │ │ │
│ │ │ │ SSH Security│ │ Password │ │USB Mount│ │ │ │
│ │ │ │ Hardening │ │ Policy │ │Support │ │ │ │
│ │ │ └─────────────┘ └─────────────┘ └─────────┘ │ │ │
│ │ └─────────────────────────────────────────────────────┘ │ │
│ └─────────────────────────────────────────────────────────┘ │
└─────────────────────────────────────────────────────────────────┘
```
## Components
### Host System
The host system is intentionally restricted to prevent build tool contamination:
- **Git** - Version control for all source code and configurations
- **Docker** - Container runtime for isolated build environment
- **Libvirt** - Virtualization for ISO testing (optional)
### Build Container
The Docker container provides a clean, reproducible build environment:
- **Base System** - Debian 13.3-slim minimal base
- **Build Tools** - live-build, debootstrap, squashfs-tools
- **Security Tools** - nftables, auditd, rsyslog
- **Testing Framework** - bats-core with support libraries
### Build Process
The ISO build process uses live-build with extensive customization:
1. **Bootstrap Phase** - Minimal Debian base system creation
2. **Configuration Phase** - Package installation and system configuration
3. **Hook Execution** - Security hardening and customization
4. **Image Creation** - Final ISO generation
### Output System
The resulting ISO provides a secure, compliant operating system:
- **Minimal Desktop** - IceWM with essential applications
- **Network Security** - WireGuard-only access with dynamic firewall
- **System Hardening** - Comprehensive security configuration
- **Compliance** - CMMC Level 3, FedRAMP, STIG, CIS compliant
## Data Flow
### Source to Build
1. **Developer** pushes code changes to Git repository
2. **Docker** builds container image with all dependencies
3. **Run Script** orchestrates the build process
4. **Live-build** creates ISO from configuration
5. **Tests** validate the build process and output
### Build to Deployment
1. **ISO Generation** - Creates secure, bootable image
2. **Testing** - Validates security and functionality
3. **Distribution** - Secure delivery to end users
4. **Installation** - Manual setup by privileged users
5. **Configuration** - VPN setup and customization
## Security Architecture
### Isolation
- **Container Isolation** - Build process isolated from host
- **Network Isolation** - No general internet access
- **Service Isolation** - Minimal running services
- **User Isolation** - Privilege separation
### Immutable Infrastructure
- **Source Controlled** - All configuration in version control
- **Containerized Builds** - Reproducible build environment
- **Immutable OS** - Package management disabled
- **Verified Boot** - Secure boot with measured components
### Defense in Depth
- **Multiple Security Layers** - Network, system, application, access
- **Fail-Safe Defaults** - Secure by default configuration
- **Comprehensive Auditing** - Complete system activity logging
- **Compliance Validation** - Automated compliance checking
## Quality Assurance
### Test-Driven Development
1. **Test First** - Tests written before implementation
2. **100% Coverage** - All code and configurations tested
3. **Automated Testing** - Continuous test execution
4. **Multiple Test Types** - Unit, integration, security tests
### Continuous Validation
1. **Linting** - Code quality and style checking
2. **Security Scanning** - Vulnerability assessment
3. **Compliance Testing** - Framework validation
4. **Performance Testing** - Resource usage validation
## Deployment Architecture
### Build Deployment
1. **Source Repository** - All code and configurations
2. **Build Environment** - Containerized build system
3. **CI/CD Pipeline** - Automated build and test
4. **Artifact Repository** - ISO storage and distribution
### System Deployment
1. **ISO Distribution** - Secure delivery mechanism
2. **Installation Process** - Manual setup by authorized users
3. **Configuration** - VPN and security customization
4. **Monitoring** - Ongoing security and compliance validation
## Maintenance Architecture
### Updates
1. **Source Updates** - Configuration changes through version control
2. **Security Updates** - Through controlled ISO rebuilds
3. **Compliance Updates** - Framework requirement changes
4. **Documentation Updates** - Continuous documentation maintenance
### Monitoring
1. **Build Monitoring** - Build process health and success rates
2. **Security Monitoring** - Vulnerability and threat monitoring
3. **Compliance Monitoring** - Continuous compliance validation
4. **Performance Monitoring** - Resource usage and performance
---
**Copyright © 2026 Known Element Enterprises LLC**
**License: GNU Affero General Public License v3.0 only**
This architecture document is maintained as part of the KNEL-Football project and is updated when system components or processes change.

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# Prompts cache
## Prompt 1
Will all of the code work with the current directory structure?
Will the code ONLY use docker containers/volumes for ALL WORK?
Will the code use knel-football-dev for all containers and volumes?
The only thing that is allowed to be written into the directory tree is the final fully customized ISO.
That artifact must be git ignored.
Triple check the entire directory tree for compliance with all the above.
## Prompt 2
Examine this entire project , the entire directory tree.
1) Review the specification located in docs/football-spec.md. That is the authority for this project.
2) Review AGENTS.md. It has important instructions (like that all work should be done in docker containers/volumes, frequent commit/push etc).
3) Check that the code complies with the specification. Fix any gaps. The specification may have outdate file paths. Make sure the specification is updated to match the current on disk reality.
4) Check that the code is using best practices. Run (in a docker container) shellcheck/shellfmt . Fix all issues found. Pull docker images with those tools and use those docker images in ephermal containers todo the checks
5) Build the ISO and boot the libvirt VM with it so i can validate the functionality

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# KNEL-Football Security Model
## Overview
The KNEL-Football security model implements a defense-in-depth approach to create a highly secure, compliant Debian 13 operating system for tier0 infrastructure access.
**Copyright © 2026 Known Element Enterprises LLC**
**License: GNU Affero General Public License v3.0 only**
## Security Architecture
### Core Principles
1. **Least Privilege** - Users and processes have only necessary permissions
2. **Defense in Depth** - Multiple layers of security controls
3. **Zero Trust** - No implicit trust, all access must be authorized
4. **Immutability** - System configuration is not easily modifiable
5. **Minimal Attack Surface** - Only necessary services and packages included
### System Hardening Layers
#### 1. Boot Security Layer
- **UEFI-Only Boot** - No legacy BIOS support prevents boot attacks
- **Secure Boot** - Cryptographic verification of bootloader and kernel
- **Measured Boot** - Boot chain integrity measurement and attestation
#### 2. Network Security Layer
- **Network Isolation** - No general internet access
- **VPN-Only Access** - WireGuard tunnel required for all network traffic
- **Firewall Hardening** - Default deny policy with specific rules
- **Wireless Disabled** - WiFi and Bluetooth permanently disabled
- **Dynamic Configuration** - Firewall rules adapt to WireGuard endpoints
#### 3. System Security Layer
- **Kernel Module Blacklisting** - Prevents loading of dangerous modules
- **Service Hardening** - Unnecessary services disabled
- **Process Isolation** - Application sandboxing where applicable
- **Resource Limits** - Prevent resource exhaustion attacks
- **Audit Logging** - Comprehensive system activity monitoring
#### 4. Access Control Layer
- **Strong Authentication** - 14-character minimum password policy
- **No Auto-Login** - Manual authentication required
- **Privacy Mode** - Usernames hidden in display manager
- **Sudo Configuration** - Controlled administrative access
- **File Permissions** - Secure access controls on sensitive files
#### 5. Application Security Layer
- **Minimal Desktop** - IceWM provides minimal attack surface
- **Required Applications Only** - Only essential tools included
- **Secure Defaults** - Applications configured with secure settings
- **No Package Management** - System immutability through disabled package tools
## Threat Model
### Adversary Capabilities
| Capability | Mitigation | Effectiveness |
|-------------|-------------|---------------|
| Network-based attacks | Network isolation, firewall | High |
| Local privilege escalation | User permissions, audit | Medium |
| Physical access attacks | Encryption, secure boot | High |
| Social engineering | Training, documentation | Medium |
| Supply chain attacks | Source verification, testing | Medium |
### Attack Scenarios
#### Scenario 1: Network-based Attack
**Attack:** Attempt to compromise system via network connection
**Mitigation:**
- No general network access available
- Only WireGuard tunnel traffic allowed
- Firewall default deny policy
- Dynamic endpoint-based rules
#### Scenario 2: USB-based Attack
**Attack:** Malicious USB device inserted
**Mitigation:**
- USB devices mounted with restrictive permissions
- No auto-execution from removable media
- Filesystem permissions restrict access
- Audit logging tracks USB activity
#### Scenario 3: Local Privilege Escalation
**Attack:** User attempts to gain root privileges
**Mitigation:**
- Strong password policies
- Sudo configuration with restrictions
- Audit logging tracks privilege usage
- System resource limits
#### Scenario 4: System Modification
**Attack:** Attempt to modify system configuration
**Mitigation:**
- Package management disabled
- Critical system files have immutable attributes
- Audit logging tracks configuration changes
- Regular compliance checks
## Security Controls
### Preventive Controls
1. **Network Controls**
- Module blacklisting for WiFi/Bluetooth
- Default deny firewall configuration
- VPN-only network access
- USB device restrictions
2. **System Controls**
- Service hardening and disabling
- Strong authentication policies
- File permission hardening
- System resource limits
3. **Boot Controls**
- UEFI-only boot mode
- Secure Boot verification
- Measured boot attestation
### Detective Controls
1. **Logging and Monitoring**
- Comprehensive audit daemon configuration
- System event logging
- Network traffic logging
- User activity tracking
2. **Compliance Validation**
- Automated compliance checks
- Security configuration verification
- Regular security assessments
- Vulnerability scanning
### Corrective Controls
1. **Incident Response**
- Automated alerting on security events
- Isolation capabilities
- System recovery procedures
- Forensic preservation
## Risk Assessment
### High-Risk Areas
1. **USB Device Handling** - Medium Risk
- **Mitigation:** Restrictive mounting, no auto-execution
- **Residual Risk:** Low
2. **Physical Access** - Medium Risk
- **Mitigation:** Full disk encryption, secure boot
- **Residual Risk:** Low
3. **VPN Configuration** - Medium Risk
- **Mitigation:** Encrypted configuration, authentication
- **Residual Risk:** Low
### Low-Risk Areas
1. **Network-based Attacks** - Low Risk
- **Mitigation:** Complete network isolation
- **Residual Risk:** Minimal
2. **Remote Exploitation** - Low Risk
- **Mitigation:** Minimal services, firewall
- **Residual Risk:** Minimal
## Security Validation
### Testing Methodology
1. **Unit Testing** - Individual security function validation
2. **Integration Testing** - End-to-end security workflow testing
3. **Penetration Testing** - External security assessment
4. **Compliance Testing** - Automated validation against standards
### Validation Metrics
1. **Coverage Metrics** - 100% of security controls tested
2. **Compliance Metrics** - 100% compliance with frameworks
3. **Vulnerability Metrics** - Zero critical vulnerabilities
4. **Configuration Metrics** - 100% secure configuration validation
## Continuous Security
### Maintenance
1. **Security Updates** - Through controlled ISO rebuilds
2. **Configuration Changes** - Through verified, version-controlled updates
3. **Compliance Monitoring** - Continuous compliance validation
4. **Security Monitoring** - Real-time security event analysis
### Improvement
1. **Threat Intelligence** - Regular threat model updates
2. **Security Assessments** - Periodic security reviews
3. **Testing Enhancement** - Continuous test suite improvement
4. **Documentation Updates** - Regular security documentation revision
---
**Copyright © 2026 Known Element Enterprises LLC**
**License: GNU Affero General Public License v3.0 only**
This security model is maintained as part of the KNEL-Football project and is updated when security requirements change or new threats emerge.