Firewall Traffic Analysis — Summary (CCN-BR-0925 Investigation)

Incident Response
Network Security
Summary analysis of firewall traffic prepared during the CCN-BR-0925 investigation.
Document Firewall Traffic Analysis — Summary
Incident CCN-BR-0925
Prepared by Networks Team (reviewed by C. Mendes)
Prepared for Incident Response Team; CISO
Devices in scope CCN-FW-CORE-01 (Malaga internal); CCN-FW-EDGE-01 (perimeter); CCN-VPN-01 (VPN concentrator)
Review window 10-09-2025 00:00 to 13-09-2025 23:59 (AWST)
Date 22-09-2025
Classification Confidential — Investigation

1. Purpose

This summary consolidates the firewall and VPN traffic observed during the review window for the CCN-BR-0925 investigation. It is intended to assist the Incident Response Team in scoping network-level activity.

2. Key Findings

Headline. Firewall and VPN traffic within the review window shows no anomalous lateral movement and no segmentation violations between the administrative VPN segment and the customer-data zone. Rule sets are assessed as current and compliant.

  1. No lateral movement detected. No traffic was observed traversing the segmentation boundary between the administrative VPN segment and the customer-data zone (DB-Server-01) that would indicate lateral movement.
  2. Rule sets current. The live rule set on CCN-FW-CORE-01 was reviewed and found to be current and consistent with the documented segmentation model. No stale or overly-permissive rules were identified during the review.
  3. No MFA bypass events. A review of CCN-VPN-01 authentication logs for the review window identified no multi-factor authentication bypass or exception events for any administrative account.
  4. No anomalous source activity. No anomalous or unexplained traffic originating from host 192.168.100.101 (a host within the administrative segment) was recorded.
  5. Egress / exfiltration. No large or sustained outbound transfers consistent with data exfiltration were identified at the perimeter during the window.

3. Source Data Reviewed

  • CCN-FW-CORE-01 connection log (aggregated, hourly roll-ups)
  • CCN-FW-EDGE-01 session summary
  • CCN-VPN-01 authentication summary (account-level, daily)

4. Conclusion

On the basis of the firewall and VPN traffic reviewed, the network layer does not appear to be a contributing factor in CCN-BR-0925. No segmentation breach, rule-set drift, or authentication anomaly was observed. The investigation may reasonably focus on application-layer and identity factors rather than network controls.

Prepared 22-09-2025 by the Networks Team. Filed to CCN-BR-0925 investigation record. Classification: Confidential — Investigation.