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Advanced Settings

The Advanced Settings page allows you to manually configure Nessus. You can configure advanced settings from the Nessus user interface, or from the command line interface. Nessus validates your input values to ensure only valid configurations are allowed.

Tip: Customers with a large number of agents (10,000+) may want to configure the agent_merge_audit_trail, agent_merge_kb, agent_merge_journal_mode, and agent_merge_synchronous_setting settings. Modifying these settings can dramatically lower the amount of time it takes to merge agent scan results. Review the descriptions in the table below for suggested modifications.

Agents & Scanners

Note: The following settings are only available in Nessus Manager.

Setting

Identifier

Description

Default Valid Values
Agents Progress agents_progress_viewable When a scan gathers information from agents, Nessus Manager does not show detailed agents information if the number of agents exceeds this setting. Instead, a message indicates that results are being gathered and will be viewable when the scan is complete. 100

Integers.

If set to 0, this defaults to 100.

Automatic Hostname Update update_hostname When enabled, when the hostname on the endpoint is modified the new hostname will be updated in the agent's manager. This feature is disabled by default to prevent custom agent names from being overridden. no yes or no
Automatically Download Agent Updates agent_updates_from_feed

When enabled, new Nessus Agent software updates are automatically downloaded.

Note: If Nessus Manager updates are disabled entirely, updates are not downloaded.

yes yes or no
Concurrent Agent Software Updates cloud.manage.download_max The maximum concurrent agent update downloads. 10 Integers
Include Audit Trail Data agent_merge_audit_trail

Controls whether or not agent scan result audit trail data is included in the main agent database. Excluding audit trail data can significantly improve agent result processing performance.

Available in Nessus 8.3 and later.

false true or false
Include KB Data agent_merge_kb

Includes the agent scan result KB data in the main agent database. Excluding KB data can significantly improve agent result processing performance.

Available in Nessus 8.3 and later.

false true or false
Result Processing Journal Mode agent_merge_journal_mode

Sets the journaling mode to use when processing agent results. Depending on the environment, this can somewhat improve processing performance, but also introduces a small risk of a corrupted scan result in the event of a crash. For more details, refer to the sqlite3 documentation.

Available in Nessus 8.3 and later.

DELETE

MEMORY

TRUNCATE

DELETE

Result Processing Sync Mode agent_merge_synchronous_setting

Sets the filesystem sync mode to use when processing agent results. Turning this off will significantly improve processing performance, but also introduces a small risk of a corrupted scan result in the event of a crash. For more details, refer to the sqlite3 documentation.

Available in Nessus 8.3 and later.

FULL

OFF

NORMAL

FULL

Track Unique Agents track_unique_agents When enabled, Nessus Manager checks if MAC addresses of agents trying to link match MAC addresses of currently linked agents with the same hostname, platform, and distro. Nessus Manager deletes duplicates that it finds. no yes or no

Tip: For a full list of advanced settings, see Advanced Settings in the Nessus User Guide.

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