The firewall must generate traffic log records containing information to establish the source of the events, such as the source IP address at a minimum.

From Firewall Security Requirements Guide Requirements

Associated with: CCI-000133

SRG-NET-000077-FW-000012_rule The firewall must generate traffic log records containing information to establish the source of the events, such as the source IP address at a minimum.

Vulnerability discussion

Without establishing the source of the event, it is impossible to establish, correlate, and investigate the events leading up to an outage or attack. In order 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 traffic log records must also identify sources of events, such as IP addresses, processes, and node or device names.

Check content

Examine the traffic log configuration on the firewall or view several alert records on the organization's central event log server. Verify the entries sent to the traffic log include sufficient information to ascertain the source of the events (e.g., IP address, session, or packet ID). If the traffic log event records do not include sufficient information to ascertain the source of the events, this is a finding.

Fix text

Configure the firewall implementation to ensure entries sent to the audit log include sufficient information to ascertain the source of each audit event (e.g., IP address, session, or packet ID).

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