The Cisco ASA must be configured to send log data to at least two central log servers for the purpose of forwarding alerts to organization-defined personnel and/or the firewall administrator.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
high	V-239943	SRG-APP-000516-NDM-000350	CASA-ND-001410	SV-239943r961863_rule	2024-08-22	2

Description
The aggregation of log data kept on a syslog server can be used to detect attacks and trigger an alert to the appropriate security personnel. The stored log data can used to detect weaknesses in security that enable the network IA team to find and address these weaknesses before breaches can occur. Reviewing these logs, whether before or after a security breach, are important in showing whether someone is an internal employee or an outside threat. The ISSM or ISSO may designate the firewall/system administrator or other authorized personnel to receive the alert within the specified time, validate the alert, and then forward only validated alerts to the information system security manager (ISSM) and information system security officer (ISSO).

Description

The aggregation of log data kept on a syslog server can be used to detect attacks and trigger an alert to the appropriate security personnel. The stored log data can used to detect weaknesses in security that enable the network IA team to find and address these weaknesses before breaches can occur. Reviewing these logs, whether before or after a security breach, are important in showing whether someone is an internal employee or an outside threat. The ISSM or ISSO may designate the firewall/system administrator or other authorized personnel to receive the alert within the specified time, validate the alert, and then forward only validated alerts to the information system security manager (ISSM) and information system security officer (ISSO).

ℹ️ Check
Verify the ASA is configured to send logs to at least two syslog servers. The configuration should look similar to the example below. logging trap notifications logging host NDM_INTERFACE 10.1.48.10 6/1514 logging host NDM_INTERFACE 10.1.48.11 6/1514 Note: A logging list can be used as an alternative to the severity level. If the ASA is not configured to send log data to at least two syslog servers, this is a finding.

ℹ️ Check

Verify the ASA is configured to send logs to at least two syslog servers. The configuration should look similar to the example below. logging trap notifications logging host NDM_INTERFACE 10.1.48.10 6/1514 logging host NDM_INTERFACE 10.1.48.11 6/1514 Note: A logging list can be used as an alternative to the severity level. If the ASA is not configured to send log data to at least two syslog servers, this is a finding.

✔️ Fix
Configure the ASA to send log messages to the syslog servers as shown in the example below. ASA(config)# logging host NDM_INTERFACE 10.1.48.10 6/1514 ASA(config)# logging host NDM_INTERFACE 10.1.48.11 6/1514 ASA(config)# logging trap notifications ASA(config)# end