CISC-ND-000490 - The Cisco router must be configured with only one local account to be used as the account of last resort in the event the authentication server is unavailable.

Information

Authentication for administrative (privileged level) access to the device is required at all times. An account can be created on the device's local database for use when the authentication server is down or connectivity between the device and the authentication server is not operable. This account is referred to as the account of last resort since it is intended to be used as a last resort and when immediate administrative access is absolutely necessary.

The account of last resort logon credentials must be stored in a sealed envelope and kept in a safe. The safe must be periodically audited to verify the envelope remains sealed. The signature of the auditor and the date of the audit should be added to the envelope as a record.
An alternative to using a sealed envelope in a safe would be credential files, separated by technology, located in a secured location on a file server, with the files only accessible to those administrators authorized to use the accounts of last resort, and access to that location monitored by a central log server.
Administrators should secure the credentials and disable the root account (if possible) when not needed for system administration functions.

Solution

Step 1: Configure a local account as shown in the example below.

R2(config)#username xxxxxxxxx privilege nn secret xxxxxxx

Step 2: Configure the authentication order to use the local account if the authentication server is not reachable as shown in the following example:

R2(config)#aaa authentication login default group tacacs+ local

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_Cisco_IOS_XE_Switch_Y22M07_STIG.zip

Item Details

Category: ACCESS CONTROL

References: 800-53|AC-2(7)(a), 800-53|AC-2a., CAT|II, CCI|CCI-001358, CCI|CCI-002111, Rule-ID|SV-215824r663915_rule, STIG-ID|CISC-ND-000490, STIG-Legacy|SV-105381, STIG-Legacy|V-96243, Vuln-ID|V-215824

Plugin: Cisco

Control ID: 13c347e65c0b9757abf409ac07a0fa812942dfd10fc4fea152da1f1e480cbf41