We actively maintain security updates for configurations targeting the following platforms:

If you discover a security vulnerability in any of the configurations, please report it responsibly.

1. Do NOT open a public issue for security vulnerabilities
2. Send details to the repository maintainer via private communication
3. Include:
   • Description of the vulnerability
   • Steps to reproduce
   • Potential impact
   • Suggested fix (if any)

• Acknowledgment within 48 hours
• Assessment and response within 7 days
• Credit in the fix commit (unless you prefer anonymity)

When using configurations from this repository:

1. Review all configurations before applying to production systems
2. Replace all placeholder values (<YOUR_USERNAME>, <YOUR_SSH_PUBLIC_KEY>, etc.)
3. Test in a staging environment first
4. Backup existing configurations before applying changes

Never commit to this repository:

• Private SSH keys
• Passwords or passphrases
• API keys or tokens
• Personal identification information
• Internal IP addresses or hostnames
• Any credentials or secrets

• Use Ed25519 keys (preferred) or RSA 4096-bit minimum
• Protect private keys with a strong passphrase
• Use separate keys for different purposes
• Rotate keys periodically

# Generate a secure Ed25519 key
ssh-keygen -t ed25519 -C "your_email@example.com"

When customizing templates:

1. Principle of least privilege: Only grant necessary permissions
2. Avoid NOPASSWD sudo in production when possible
3. Enable firewall (ufw/iptables) with minimal open ports
4. Keep systems updated: Automated security updates are enabled by default
5. Monitor logs: Set up log aggregation and alerting

• SSH hardening

  • Password authentication disabled
  • Root login disabled
  • Public key authentication enforced
  • Strict modes enabled

• Automatic updates

  • Unattended security updates enabled
  • Configurable reboot schedule

• File permissions

  • Swap file: 600
  • SSH config: 644
  • Private keys: 600

Consider adding these for production:

# Fail2ban for brute force protection
apt install fail2ban

# UFW firewall
ufw default deny incoming
ufw default allow outgoing
ufw allow ssh
ufw enable

# Audit logging
apt install auditd

These configurations provide a foundation for various compliance requirements, but additional hardening may be needed:

• CIS Benchmarks: Partial compliance; review CIS Ubuntu/Debian benchmarks
• PCI-DSS: Additional controls required
• HIPAA: Additional controls and documentation required
• SOC 2: Foundational controls included

Before deploying to production:

• All placeholder values replaced
• SSH keys are unique per environment
• Firewall rules configured
• Unnecessary services disabled
• Log monitoring configured
• Backup strategy in place
• Incident response plan documented
• Access controls documented
• Configuration tested in staging

• CIS Benchmarks
• Ubuntu Security Guide
• Debian Security Information
• NIST Cybersecurity Framework
• OWASP Cheat Sheet Series

Security is a continuous process, not a destination. Regularly review and update your configurations.