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The Cisco router must be configured to back up the configuration when changes occur.


Finding ID Version Rule ID IA Controls Severity
V-96359 CISC-ND-001410 SV-105497r2_rule Medium
System-level information includes default and customized settings and security attributes, including ACLs that relate to the network device configuration, as well as software required for the execution and operation of the device. Information system backup is a critical step in ensuring system integrity and availability. If the system fails and there is no backup of the system-level information, a denial of service condition is possible for all who utilize this critical network component. This control requires the network device to support the organizational central backup process for system-level information associated with the network device. This function may be provided by the network device itself; however, the preferred best practice is a centralized backup rather than each network device performing discrete backups.
Cisco IOS XE Router NDM Security Technical Implementation Guide 2019-12-20


Check Text ( C-95195r2_chk )
Review the Cisco router configuration to verify that it is compliant with this requirement. The example configuration below will send the configuration to a TFTP server when a configuration change occurs.

event manager applet BACKUP_CONFIG
event syslog pattern "%SYS-5-CONFIG_I"
action 1 info type routername
action 2 cli command "enable"
action 3 cli command "copy run tftp" pattern "remote host"
action 4 cli command "x.x.x.x" pattern "filename"
action 5 cli command "$_info_routername-config"
action 6 syslog priority informational msg "Configuration backup was executed"

If the Cisco router is not configured to conduct backups of the configuration when changes occur, this is a finding.
Fix Text (F-102035r2_fix)
Configure the Cisco router to send the configuration to a TFTP or FTP server when a configuration change occurs as shown in the example below.

R4(config)#event manager applet BACKUP_CONFIG
R4(config-applet)#event syslog pattern "%SYS-5-CONFIG_I"
R4(config-applet)#action 1 cli command "enable"
R4(config-applet)#action 2 info type routername
R4(config-applet)#action 3 cli command "copy run tftp" pattern "remote host"
R4(config-applet)#action 4 cli command "x.x.x.x" pattern "filename"
R4(config-applet)#action 5 cli command "$_info_routername-config"
R4(config-applet)#action 6 syslog priority informational msg "Configuration backup was executed"