คุณสมบัติ Network Security หลัก (Core Network Security Features)
| หมวดหมู่ | Features / Technologies | คำอธิบายสั้น |
|---|---|---|
| Perimeter & Network Defense | Next-Gen Firewall (NGFW) | App-ID, User-ID, Content-ID, SSL Decryption, IPS, Anti-Virus, DNS Security |
| Intrusion Prevention System (IPS/IDS) | Signature + Anomaly + Behavioral Detection, Automated Blocking | |
| Web Application Firewall (WAF) | OWASP Top 10 Protection, Bot Mitigation, API Security | |
| DDoS Protection | Volumetric, Protocol, Application Layer Mitigation (Cloud/On-prem) | |
| Network Segmentation & Access | VLAN / PVLAN / Micro-segmentation | Logical Isolation, East-West Traffic Control |
| Zero Trust Network Access (ZTNA) | Identity-based Access, Device Posture Check, Least Privilege | |
| Network Access Control (NAC) | 802.1X, MAB, Posture Assessment, Guest/Contractor Access | |
| Software-Defined Perimeter (SDP) | Hide Resources, Single Packet Authorization (SPA) | |
| Visibility & Monitoring | Network Traffic Analysis (NTA/NDR) | Flow Analysis (NetFlow/sFlow/IPFIX), Behavioral Analytics, Encrypted Traffic Analysis |
| SIEM / Log Management | Centralized Logging, Correlation Rules, Alerting, Dashboards | |
| Packet Capture / PCAP | Full Packet Capture, Retrospective Analysis, Forensics | |
| DNS Security / Protective DNS | Block Malicious Domains, DGA Detection, DNS over HTTPS/TLS | |
| Data Protection | Encryption (In-Transit: TLS 1.3, IPsec, MACsec) | Data in Motion Protection |
| Encryption (At-Rest) | Disk/Database/Object Encryption, Key Management (HSM/KMS) | |
| Data Loss Prevention (DLP) | Content Inspection, Exact Match, Regex, Fingerprinting, Cloud DLP | |
| Cloud & Modern Infrastructure | Cloud Security Posture Management (CSPM) | Misconfiguration Detection, Compliance Frameworks (CIS, NIST, PCI) |
| Cloud Workload Protection (CWPP) | Runtime Protection, Vulnerability Mgmt, Compliance (VM, Container, Serverless) | |
| Kubernetes / Container Security | Admission Control, Runtime Security, Network Policies, Image Scanning |
4 ส่วนประกอบสำคัญที่สุด (Four Essential Components - Gartner/Industry)
- Firewall (NGFW): การป้องกันขอบและภายใน (Inter-segment)
- Intrusion Prevention System (IPS): ป้องกันการโจมตีที่รู้จักและไม่รู้จัก
- Network Access Control (NAC): ควบคุมว่าใคร/อุปกรณ์ไหน เข้ามาได้ บ้าง
- Security Information and Event Management (SIEM): มองเห็นภาพรวม Correlate และ Respond
การจัดการ Network Security (Management Lifecycle)
1. Plan & Design
- Risk Assessment, Threat Modeling (MITRE ATT&CK)
- Architecture: Zero Trust, Micro-segmentation, SASE
- Policy Definition: Baseline, Exception Handling
2. Deploy & Configure
- Infrastructure as Code (Terraform, Ansible, ARM/Bicep)
- Golden Images / Hardened Templates
- Change Management / Approval Workflow
3. Operate & Monitor
- 24/7 SOC Monitoring (Tier 1/2/3)
- Threat Hunting (Proactive)
- Vulnerability Management (Scan → Prioritize → Patch → Verify)
- Log Retention / Compliance Reporting
4. Respond & Improve
- Incident Response Plan + Playbooks
- Post-Incident Review (Root Cause, Lessons Learned)
- Continuous Improvement (Purple Teaming, Red Team Exercises)
Best Practices ที่ควรนำไปใช้ (Implemented & Managed)
- ☐ Zero Trust Architecture: Verify Explicitly, Least Privilege, Assume Breach
- ☐ Micro-segmentation: East-West Traffic Control (NSX, ACI, Calico, Cilium)
- ☐ Encryption Everywhere: TLS 1.3, mTLS, IPsec, MACsec, Disk Encryption
- ☐ Automated Threat Response: SOAR Playbooks (Isolate Host, Block IP, Reset Password)
- ☐ Continuous Compliance: Policy as Code (OPA, Sentinel), Drift Detection
- ☐ Supply Chain Security: SBOM, Image Signing (Cosign/Notary), SLSA
- ☐ Security Training: Phishing Simulation, Secure Coding, Incident Drills
Metrics / KPIs สำหรับวัดประสิทธิภาพ
| Metric | Target |
|---|---|
| Mean Time to Detect (MTTD) | < 1 ชั่วโมง (Critical) |
| Mean Time to Respond (MTTR) | < 4 ชั่วโมง (Critical) |
| Vulnerability Remediation SLA | Critical: 72 hrs, High: 30 days |
| Phishing Click Rate | < 5% (หลังฝึกอบรม) |
| Security Coverage | > 95% Assets Managed/Monitored |
| Policy Compliance Rate | > 98% |
