Security Infrastructure Design Document Introduction This document outlines a comprehensive security infrastructure plan for our fictional company, ensuring robust protection of customer payment data and internal resources. Security measures are essential given the company’s role in handling sensitive customer information. Each section below identifies key components that will safeguard external and internal systems. 1. Authentication System Multi-Factor Authentication (MFA): Implement MFA for both external and internal systems to enhance user verification. Single Sign-On (SSO): Utilize an SSO solution for internal applications, enabling easier user management and reducing password fatigue. Access Control Lists (ACLs): Define role-based access to ensure users only access necessary resources. 2. External Website Security SSL/TLS Encryption: Secure the website with HTTPS to encrypt data in transit, especially during customer transactions. Web Application Firewall (WAF): Deploy a WAF to protect against SQL injection, cross-site scripting (XSS), and other web-based attacks. DDoS Protection: Include DDoS mitigation services to prevent service interruptions due to malicious traffic. 3. Internal Website Security Network Segmentation: Isolate sensitive data and applications by segmenting the network for minimal access. Use VLANs for department separation. Strong Password Policies: Enforce complex password requirements for internal systems, rotating passwords regularly. Regular Security Updates: Schedule routine updates and patch management for all internal applications. 4. Remote Access Solution VPN Setup: Implement a secure Virtual Private Network (VPN) for remote access, encrypting all data transmitted by remote employees. Bastion Host: Create a bastion host for remote command line access to workstations, with controlled access based on user roles. Session Timeouts: Enforce automatic logout after periods of inactivity to reduce risk during remote sessions. 5. Firewall and Basic Rules Recommendations Perimeter Firewall: Implement a next-generation firewall (NGFW) at the perimeter to inspect traffic for attacks and threats. Internal Firewalls: Utilize internal firewalls between segments to restrict access to sensitive data based on predefined policies. Basic Rules: Allow only necessary outbound traffic. Block all incoming traffic by default, allowing only specific services (e.g., HTTPS, SSH) as needed. 6. Wireless Security WPA3 Encryption: Use the WPA3 protocol for robust wireless encryption, preventing unauthorized access to the network. SSID Segmentation: Create distinct SSIDs for guests and internal employees to control access. Regular Monitoring: Schedule frequent scans for unauthorized access points and rogue devices. 7. VLAN Configuration Recommendations Departmental VLANs: Separate VLANs for various departments (engineering, sales, finance) to limit broadcast traffic and enhance security. Guest VLAN: Set up a separate guest VLAN that restricts access to internal resources, allowing guests only internet access. Quarantine VLAN: Create a VLAN for devices that require security checks before being granted access to the internal network. 8. Laptop Security Configuration Full Disk Encryption: Encrypt all company laptops using solutions like BitLocker or FileVault to protect data at rest. Endpoint Detection and Response (EDR): Deploy EDR solutions to monitor for malware and malicious activity on laptops. Device Policies: Enforce policies around the use of USB drives and external devices to prevent data loss. 9. Application Policy Recommendations Secure Development Lifecycle (SDLC): Adopt an SDLC model that incorporates regular security reviews and testing for all applications. Third-Party Software Reviews: Conduct thorough vetting of third-party applications and libraries before integration. Application Access Control: Implement strict access controls on applications that handle customer data. 10. Security and Privacy Policy Recommendations Data Retention Policy: Establish data retention periods, ensuring customer data retention aligns with compliance regulations. Incident Response Plan: Develop a robust incident response plan that outlines steps for response and recovery from security incidents. Training and Awareness: Provide ongoing security training for employees surrounding data protection and privacy practices. 11. Intrusion Detection or Prevention for Systems Containing Customer Data Intrusion Detection System (IDS): Set up an IDS to monitor for suspicious activities in real-time on servers containing customer data. Regular Log Auditing: Implement log management and regular audits for critical systems to identify anomalies. Threat Intelligence Integration: Use threat intelligence feeds to stay informed of the latest vulnerabilities and attack signatures. Conclusion Implementing these security measures will greatly reduce the risk of unauthorized access and data breaches at ACME Widget Co. The plan combines technology, policies, and processes to create a holistic approach to security. Regular reviews and updates of this security infrastructure will ensure it evolves with emerging threats and best practices.
Feedback Thank you for your submission! A great submission should include: Two authentication system requirements, like Security Key-based multifactor or OTP-based multifactor, and some kind of centralized authentication system (e.g., LDAP or Active Directory). A description of HTTPS. Recommendation for both a VPN service and a reverse proxy solution. A description of two or more types of firewall services (e.g., implicit deny rule, remote access, websites). Requirement for 802.1X. A description of four VLAN requirements, including Engineering VLAN, Sales VLAN, Infrastructure VLAN, and Guest VLAN. Three laptop security requirements, including FDE recommendations, antivirus recommendation, and a binary whitelisting recommendation. Requirement for a software update requirement policy and a requirement for restrictions on the types of applications permitted. Recommendations for rules protecting access to user data and for rules protecting the storage of user data. A description of four of the following security policy recommendations: passwords requiring a minimum of 8 characters; passwords requiring special characters; requiring periodic password changes > 6 months; and some form of mandatory security training for users. A requirement for a NIPS/NIDS on the network for customer data and a requirement for HIPS/HIDS on systems containing customer data.