Auditing is another area that gets the enhancement treatment in OneFS 8.2. Auditing can detect potential sources of data loss, fraud, inappropriate entitlements, access attempts that should not occur, and a range of other anomalies that are indicators of risk. This can be especially useful when the audit associates data access with specific user identities.
In the interests of data security, OneFS provides ‘chain of custody’ auditing by logging specific activity on the cluster. This includes OneFS configuration changes plus NFS, SMB, and HDFS client protocol activity, which are required for organizational IT security compliance, as mandated by regulatory bodies like HIPAA, SOX, FISMA, MPAA, etc.
OneFS auditing uses Dell EMC’s Common Event Enabler (CEE) to provide compatibility with external audit applications. A cluster can write audit events across up to five CEE servers per node in a parallel, load-balanced configuration. This allows OneFS to deliver an end to end, enterprise grade audit solution which efficiently integrates with third party solutions like Varonis DatAdvantage.
In OneFS 8.2, auditing has been enhanced to allow greater control over exactly what protocol activity is audited. For example, the new functionality:
- Stops collection of unneeded audit events that 3rd party applications do not register for
- Reduces the number of audit events collected to only what is needed. Less unneeded events are stored on ifs and sent off cluster.
OneFS protocol auditing events in 8.2 are now configurable at CEE granularity, with each OneFS event mapping directly to a CEE event. This allows customers to configure protocol auditing to collect only what their auditing application requests, reducing both the number of events discarded by CEE and stored on /ifs.
A new ‘isi audit settings’ command syntax and corresponding platformAPI handler (/7/audit/settings) is introduced for configuring audit events. The audit filter collects events based off of this new audit event configuration.
A new ‘detail_type’ field has been added to OneFS internal protocol audit events in OneFS 8.2 to allow a direct mapping to CEE audit events. For example:
Old audit events are processed and mapped to the same CEE audit events as in previous releases. Backwards compatibility is maintained with previous audit events such that old versions ignore the new field. There are no changes to external audit events sent to CEE or syslog.
Here are the new protocol audit events, and their mapping to pre-8.2 events:
New OneFS 8.2 Audit Event
Pre-8.2 Audit Event
Note that the non-file protocol audit events have not been changed in OneFS 8.2. Namely:
The ‘isi audit settings’ CLI command now displays and uses the new protocol audit events, while the audit WebUI remains unchanged. All options that take <events> use the new protocol audit events. For example:
# isi audit settings view --zone=<zone>
# isi audit settings modify --audit-success=<events> --zone=<zone>
# isi audit settings modify --audit-failure=<events> --zone=<zone>
# isi audit settings modify --syslog-audit-events=<events> --zone=<zone>
When it comes to troubleshooting audit on a cluster, the ‘isi_audit_viewer’ utility can be used to list protocol audit events collected.
# isi_audit_viewer -h
Usage: isi_audit_viewer [ -n <nodeid> | -t <topic> | -s <starttime>|
-e <endtime> | -v ]
-n <nodeid> : Specify node id to browse (default: local node)
-t <topic> : Choose topic to browse.
Topics are "config" and "protocol" (default: "config")
-s <start> : Browse audit logs starting at <starttime>
-e <end> : Browse audit logs ending at <endtime>
-v verbose : Prints out start / end time range before printing
The new audit event type is in the ‘detail_type’ field. Additionally, any errors that are encountered while processing audit events, and when delivering them to an external CEE server, are written to the log file ‘/var/log/isi_audit_cee.log’. Additionally, the protocol specific logs will contain any issues the audit filter has collecting while auditing events.
These protocol log files are: