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The Cisco router must produce audit records containing information to establish where the events occurred.


Finding ID Version Rule ID IA Controls Severity
V-215673 CISC-ND-000290 SV-215673r521266_rule Medium
In order to compile an accurate risk assessment and provide forensic analysis, it is essential for security personnel to know where events occurred, such as device hardware components, device software modules, session identifiers, filenames, host names, and functionality. Associating information about where the event occurred within the network device provides a means of investigating an attack; recognizing resource utilization or capacity thresholds; or identifying an improperly configured device.
Cisco IOS Router NDM Security Technical Implementation Guide 2022-06-09


Check Text ( C-16867r285981_chk )
Review the deny statements in all ACLs to determine if the log-input parameter has been configured as shown in the example below.

ip access-list extended BLOCK_INBOUND
deny icmp any any log-input

If the router is not configured with the log-input parameter after any deny statements to note where packets have been dropped via an ACL, this is a finding.
Fix Text (F-16865r285982_fix)
Configure the log-input parameter after any deny statements to provide the location as to where packets have been dropped via an ACL.

R1(config)#ip access-list extended BLOCK_INBOUND
R1(config-ext-nacl)#deny icmp any any log-input