Fortinet NSE5_FSM-6.3 Practice Test - Questions Answers, Page 3

Threshold Management: FortiSIEM uses thresholds to generate alerts and incidents based on performance and security metrics.

Global Thresholds: These are default thresholds applied to all devices and metrics across the system, providing a baseline for alerts.

Per Device Thresholds: These thresholds can be customized for individual devices, allowing for more granular control and tailored monitoring based on specific device characteristics and requirements.

Usage in Performance Metrics: Both global and per device thresholds are used for performance metrics to ensure comprehensive and precise monitoring.

Reference: FortiSIEM 6.3 User Guide, Thresholds and Alerts section, details the application of global and per device thresholds for performance and security metrics.

Enterprise Licensing Mode: In FortiSIEM enterprise licensing mode, collectors are deployed in remote sites to gather and forward data to the central FortiSIEM cluster located in the data center.

Collector Functionality: Collectors are responsible for receiving logs, events (e.g., syslog), and performance metrics from devices.

Link Down Scenario: When the link between the collector and the FortiSIEM cluster is down, the collector needs a mechanism to ensure no data is lost during the disconnection.

Event Buffering: The collector buffers the events locally until the connection is restored, ensuring that no incoming events are lost. This buffered data is then forwarded to the FortiSIEM cluster once the link is re-established.

Reference: FortiSIEM 6.3 User Guide, Data Collection and Buffering section, explains the behavior of collectors during network disruptions.

FortiSIEM Architecture: The FortiSIEM architecture includes several components such as Supervisors, Workers, Collectors, and Agents, each playing a distinct role in the SIEM ecosystem.

Real-Time Event Correlation: Real-time event correlation is a critical function that involves analyzing and correlating incoming events to detect patterns indicative of security incidents or operational issues.

Role of Supervisor and Worker:

Supervisor: The Supervisor oversees the entire FortiSIEM system, coordinating the processing and analysis of events.

Worker: Workers are responsible for processing and correlating the events received from Collectors and Agents.

Collaboration for Correlation: Together, the Supervisor and Worker components perform real-time event correlation by distributing the load and ensuring efficient processing of events to identify incidents in real-time.

Reference: FortiSIEM 6.3 User Guide, Event Correlation and Processing section, details how the Supervisor and Worker components collaborate for real-time event correlation.

Disaster Recovery Mode: FortiSIEM's disaster recovery (DR) mode ensures that there is a backup system ready to take over in case the primary system fails.

Manual Tasks for DR Operation: In the event of a disaster, certain tasks must be performed manually to ensure a smooth transition to the secondary system.

Promoting the Secondary Supervisor:

Use the command phSecondary2primary to promote the secondary supervisor to the primary role. This command reconfigures the secondary supervisor to take over as the primary supervisor, ensuring continuity in management and coordination.

Changing DNS Configuration:

Update the DNS configuration to direct all users, devices, and collectors to the secondary FortiSIEM instance. This ensures that all components in the environment can communicate with the newly promoted primary supervisor without manual reconfiguration of individual devices.

Reference: FortiSIEM 6.3 Administration Guide, Disaster Recovery section, provides detailed steps on promoting the secondary supervisor and updating DNS configurations during a disaster recovery operation.

Device Status in FortiSIEM: FortiSIEM assigns different statuses to devices based on their operational state and performance metrics.

Packet Loss Impact: The reported packet loss percentage directly influences the status assigned to a device. Packet loss between 50% and 98% indicates significant network issues that affect the device's performance.

Degraded Status: When packet loss is between 50% and 98%, FortiSIEM assigns a 'Degraded' status to the device. This status indicates that the device is experiencing substantial packet loss, which impairs its performance but does not render it completely non-functional.

Reasoning: The 'Degraded' status helps administrators identify devices with serious performance issues that need attention but are not entirely down.

Reference: FortiSIEM 6.3 User Guide, Device Availability and Status section, explains the criteria for assigning different statuses based on performance metrics such as packet loss.

Syslog Reception Verification: To verify whether syslog messages are being received from a network device, a network packet capture tool can be used.

tcpdump Command: tcpdump is a powerful command-line packet analyzer tool available in Unix-like operating systems. It allows administrators to capture and analyze network traffic.

Usage: By using tcpdump with the appropriate filters (e.g., port 514 for syslog), administrators can monitor the incoming syslog messages in real-time to verify if they are being received.

Example Command: tcpdump -i <interface> port 514 captures the syslog messages on the specified network interface.

Reference: FortiSIEM 6.3 User Guide, CLI Commands section, which details the usage of tcpdump for network traffic analysis and verification of syslog reception.

Search Filters in FortiSIEM: When searching for specific events, administrators can use various attributes to filter the results.

Attribute for Agent Events: To view events received specifically from Linux and Windows agents, the attribute External Event Receive Agents should be used.

Function: This attribute filters events that are received from agents, distinguishing them from events received through other protocols or sources.

Search Efficiency: Using this attribute helps the administrator focus on events collected by FortiSIEM agents, making the search results more relevant and targeted.

Reference: FortiSIEM 6.3 User Guide, Event Search and Filters section, which describes the available attributes and their usage for filtering search results.