Within the CHFI v11 syllabus under Network Forensics and Log Analysis , understanding Cisco router log mnemonics is essential for investigating network-based attacks and policy violations. Cisco devices generate structured log messages that include a facility , severity level , and mnemonic , which together describe the event detected by the device.
The mnemonic %SEC-6-IPACCESSLOGP specifically indicates that a packet (TCP or UDP) matched an IP Access Control List (ACL) rule and was logged accordingly. The "SEC" facility denotes a security- related event, the severity level "6" represents an informational message, and "IPACCESSLOGP" confirms that the log entry was generated due to an ACL permit or deny rule matching a packet. This type of log is commonly used in forensic investigations to trace suspicious traffic, identify unauthorized access attempts, and correlate firewall or router behavior with other network logs.
Option B ( IPACCESSLOGRL ) refers to rate-limited ACL logging, not standard packet logging. Option A is specific to IPv6 ACL logging and does not apply unless IPv6 traffic is explicitly involved. Option D ( TOOMANY ) relates to excessive event conditions and is not tied to ACL packet matching.
The CHFI v11 Exam Blueprint highlights analyzing Cisco router and firewall logs , including ACL-based messages, as a key skill for detecting network attacks and reconstructing intrusion timelines. Therefore, % SEC-6-IPACCESSLOGP is the correct and exam-aligned answer