About Me
CompTIA Security+
1 Threats, Attacks, and Vulnerabilities
1-1 Types of Threats
1-2 Types of Attacks
1-3 Vulnerabilities
1-4 Threat Actors and Motives
1-5 Threat Intelligence
1-6 Incident Response
1-7 Penetration Testing
1-8 Vulnerability Scanning
1-9 Threat Modeling
1-10 Security Controls
2 Technologies and Tools
2-1 Firewalls
2-2 Intrusion Detection Systems (IDS)
2-3 Intrusion Prevention Systems (IPS)
2-4 Security Information and Event Management (SIEM)
2-5 Data Loss Prevention (DLP)
2-6 Security Orchestration, Automation, and Response (SOAR)
2-7 Endpoint Security
2-8 Network Security
2-9 Cloud Security
2-10 Mobile Device Security
2-11 Secure Coding Practices
2-12 Cryptography
2-13 Public Key Infrastructure (PKI)
2-14 Certificate Management
2-15 Security Tools and Utilities
3 Architecture and Design
3-1 Security Models
3-2 Security Controls
3-3 Secure Network Design
3-4 Secure Systems Design
3-5 Secure Application Design
3-6 Secure Cloud Architecture
3-7 Secure Mobile Architecture
3-8 Secure IoT Architecture
3-9 Secure Data Storage
3-10 Secure Backup and Recovery
3-11 Security in DevOps
3-12 Security in Agile Development
3-13 Security in Continuous IntegrationContinuous Deployment (CICD)
3-14 Security in Configuration Management
3-15 Security in Identity and Access Management (IAM)
4 Identity and Access Management
4-1 Authentication Methods
4-2 Authorization Mechanisms
4-3 Identity and Access Management (IAM) Concepts
4-4 Single Sign-On (SSO)
4-5 Multi-Factor Authentication (MFA)
4-6 Federation
4-7 Role-Based Access Control (RBAC)
4-8 Attribute-Based Access Control (ABAC)
4-9 Identity as a Service (IDaaS)
4-10 Identity Lifecycle Management
4-11 Access Reviews and Audits
4-12 Privileged Access Management (PAM)
4-13 Identity Federation
4-14 Identity Provisioning and Deprovisioning
5 Risk Management
5-1 Risk Management Concepts
5-2 Risk Assessment
5-3 Risk Mitigation Strategies
5-4 Business Impact Analysis (BIA)
5-5 Risk Register
5-6 Risk Treatment
5-7 Risk Monitoring and Reporting
5-8 Risk Appetite and Tolerance
5-9 Risk Communication
5-10 Risk Transfer
5-11 Risk Acceptance
5-12 Risk Avoidance
5-13 Risk Reduction
5-14 Risk in Cloud Environments
5-15 Risk in Mobile Environments
5-16 Risk in IoT Environments
6 Cryptography and PKI
6-1 Cryptographic Concepts
6-2 Symmetric Encryption
6-3 Asymmetric Encryption
6-4 Hashing
6-5 Digital Signatures
6-6 Public Key Infrastructure (PKI)
6-7 Certificate Management
6-8 Certificate Authorities (CAs)
6-9 Certificate Revocation
6-10 Key Management
6-11 Cryptographic Protocols
6-12 Cryptographic Attacks
6-13 Quantum Cryptography
6-14 Post-Quantum Cryptography
6-15 Cryptographic Use Cases
7 Security Operations
7-1 Security Operations Concepts
7-2 Security Policies and Procedures
7-3 Security Awareness and Training
7-4 Security Monitoring and Logging
7-5 Incident Response
7-6 Forensics
7-7 Disaster Recovery
7-8 Business Continuity
7-9 Physical Security
7-10 Personnel Security
7-11 Supply Chain Security
7-12 Third-Party Risk Management
7-13 Security Audits and Assessments
7-14 Compliance and Regulatory Requirements
7-15 Security Metrics and Reporting
7-16 Security Operations Center (SOC)
7-17 Security Orchestration, Automation, and Response (SOAR)
7-18 Security in DevOps
7-19 Security in Agile Development
7-20 Security in Continuous IntegrationContinuous Deployment (CICD)
3.3 Secure Network Design Explained

3.3 Secure Network Design Explained

Key Concepts

Secure Network Design involves creating a network architecture that protects data, devices, and users from unauthorized access and cyber threats. Key concepts include network segmentation, secure routing, and secure network access control.

Network Segmentation

Network Segmentation is the practice of dividing a network into smaller, isolated segments to limit the spread of attacks and improve security. Each segment can have its own security policies and access controls, reducing the risk of unauthorized access.

Example: A large corporation segments its network into departments such as HR, Finance, and IT. Each department has its own subnet with specific access controls. If a breach occurs in the IT department, the attacker cannot easily access sensitive HR or Finance data.

Secure Routing

Secure Routing involves implementing protocols and configurations that protect the integrity and confidentiality of network traffic. This includes using secure routing protocols like BGP (Border Gateway Protocol) with authentication mechanisms to prevent route hijacking and other attacks.

Example: An ISP (Internet Service Provider) uses BGP with MD5 authentication to secure its routing tables. This ensures that only authorized routers can advertise routes, preventing malicious actors from redirecting traffic to unauthorized networks.

Secure Network Access Control

Secure Network Access Control (NAC) involves enforcing security policies on network devices before they are granted access to the network. This ensures that devices comply with security requirements, such as having up-to-date antivirus software or operating system patches.

Example: A university implements NAC to ensure that all student and faculty devices meet security requirements before accessing the campus network. Devices that do not comply are placed in a quarantine network until they meet the necessary security standards.

Conclusion

Secure Network Design is crucial for protecting data and devices from cyber threats. By implementing network segmentation, secure routing, and secure network access control, organizations can create a robust and resilient network architecture that minimizes the risk of unauthorized access and data breaches.

© 2024 Ahmed Baheeg Khorshid. All rights reserved.