Full Packet Capture as Strategic and Regulatory Imperative

The Full Packet Capture as Strategic and Regulatory Imperative white paper, published by SANS Institute in November 2025, examines how full packet capture (FPC) has evolved from an isolated network monitoring practice into a requirement across global cybersecurity regulations and standards. The paper covers the technical foundations of FPC, the regulatory landscape driving adoption, implementation challenges, and a strategic deployment framework.

Key findings:

• ISO/IEC 27001:2022 Control A.8.15 explicitly requires organizations to maintain comprehensive logs of system activities, user access, exceptions, faults, and information security events
• NIST Cybersecurity Framework 2.0 has enhanced its "Detect" function to require the ability to analyze complete network communications rather than just metadata or sampled traffic flows
• NIST SP 800-207 (Zero Trust Architecture) explicitly requires continuous monitoring and validation of network communications, making packet-level visibility essential for zero trust implementations
• The US federal government has issued a directive requiring 72-hour mandated full packet capture, while the EU's NIS2 Directive highlights comprehensive evidence preservation requirements
• PCI-DSS v4.0 has expanded network security controls beyond traditional firewalls to require more sophisticated monitoring and analysis capabilities for protecting cardholder data
• Some FPC vendors are noted as the only packet capture solutions currently holding Common Criteria (CC)/NIAP certification, a requirement for government security products
• Chain of custody requirements following ISO/IEC 27037 and NIST SP 800-86 standards require packet data to maintain its evidentiary value throughout the retention period

The paper's central argument is that FPC adoption is no longer a question of "should we," but "how quickly" organizations can deploy it, because so many overlapping global regulatory frameworks now implicitly or explicitly demand forensic-grade network visibility that legacy logging and sampled-traffic monitoring cannot provide. A single FPC implementation can be positioned to satisfy multiple compliance regimes simultaneously rather than requiring fragmented point solutions for each one. This is a strategic/regulatory analysis rather than primary survey research, authored by Matt Bromiley and drawing on named regulatory frameworks (ISO, NIST, PCI-DSS, GDPR, NIS2) rather than a SANS-fielded survey.