Details

Without establishing the source of the event, it is impossible to establish, correlate, and investigate the events leading up to an outage or attack.

To compile an accurate risk assessment and provide forensic analysis, security personnel need to know the source of the event.

In addition to logging where events occur within the network, the audit records must also identify sources of events such as IP addresses, processes, and node or device names.

Solution

Configure the switch to log events containing information to establish where the events occurred as shown in the example below:

SW1(config)#ip access-list extended INGRESS_FILTER
…
…
…
SW1(config-ext-nacl)#deny ip any any log-input

Supportive Information

The following resource is also helpful.

• https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_Cisco_IOS_Switch_Y21M07_STIG.zip

This security hardening control applies to the following category of controls within NIST 800-53: Audit and Accountability.This control applies to the following type of system Cisco.

References

• 800-53|AU-3
• CAT|II
• CCI|CCI-000133
• Rule-ID|SV-220438r622190_rule
• STIG-ID|CISC-RT-000220
• STIG-Legacy|SV-110723
• STIG-Legacy|V-101619
• Vuln-ID|V-220438

Source

• Tenable.com/audits