The IAO/NSO will ensure a record is maintained of all logons and transactions processed by the management station.

NOTE: Include time logged in and out, devices that were accessed and modified, and other activities performed.

Logging is a critical part of network security. Maintaining an audit trail of system activity logs can help identify configuration errors, understand past intrusions, troubleshoot service disruptions, and react to probes and scans of the network. Audit logs are also necessary to provide a trail of evidence in case the network is compromised. Without an audit trail that provides a when, where, who and how set of information, repeat offenders could continue attacks against the network indefinitely. With this information, the network administrator can devise ways to block the attack and possibly identify and prosecute the attacker.