CPU Usage (per core)

This module checks that the CPU usage on all the cores is not overloaded and alerts when CPU usage exceeds the thresholds configured for the module. The Warning Threshold % default value is 80. The Critical Threshold % default value is 90.

Disk Status

This module examines the performance of the hard disk and malware storage pack (if installed) on the appliance.

This module generates a Warning (yellow) health alert when the hard disk and RAID controller (if installed) are in danger of failing, or if an additional hard drive is installed that is not a malware storage pack. This module generates an Alert (red) health alert when an installed malware storage pack cannot be detected.

Disk Usage

This module compares disk usage on the appliance’s hard drive and malware storage pack to the limits configured for the module and alerts when usage exceeds the thresholds configured for the module. This module also alerts when the system excessively deletes files in monitored disk usage categories, or when disk usage excluding those categories reaches excessive levels, based on module thresholds. See Disk Usage and Drain of Events Health Monitor Alerts for information about troubleshooting scenarios for Disk Usage alerts.

Use the Disk Usage health status module to monitor disk usage for the / and /volume partitions on the appliance and track draining frequency. Although the disk usage module lists the /boot partition as a monitored partition, the size of the partition is static so the module does not alert on the boot partition.

File System Integrity Check

This module performs a file system integrity check and runs if the system has CC mode or UCAPL mode enabled, or if the system runs an image signed with a DEV key. This module is enabled by default.

Health Monitor Process

This module monitors the status of the health monitor itself and alerts if the number of minutes since the last health event received by the FMC exceeds the Warning or Critical limits.

Interface Status

This module determines if the device currently collects traffic and alerts based on the traffic status of physical interfaces and aggregate interfaces. For physical interfaces, the information includes interface name, link state, and bandwidth. For aggregate interfaces, the information includes interface name, number of active links, and total aggregate bandwidth.

Local Malware Analysis

This module monitors ClamAV updates for Local Malware Analysis.

Memory Usage

This module compares memory usage on the appliance to the limits configured for the module and alerts when usage exceeds the levels configured for the module.

For appliances with more than 4 GB of memory, the preset alert thresholds are based on a formula that accounts for proportions of available memory likely to cause system problems. On >4 GB appliances, because the interval between Warning and Critical thresholds may be very narrow, its recommended that you manually set the Warning Threshold % value to 50. This will further ensure that you receive memory alerts for your appliance in time to address the issue. See Memory Usage Thresholds for Health Monitor Alerts for additional information about how thresholds are calculated.

Beginning with Version 6.6.0, the minimum required RAM for FMCv upgrades to Version 6.6.0+ is 28 GB, and the recommended RAM for FMCv deployments is 32 GB. We recommend you do not decrease the default settings: 32 GB RAM for most FMCv instances, 64 GB for the FMCv 300 (VMware only).

Complex access control policies and rules can command significant resources and negatively affect performance.

Process Status

This module determines if processes on the appliance exit or terminate outside of the process manager.

If a process is deliberately exited outside of the process manager, the module status changes to Warning and the health event message indicates which process exited, until the module runs again and the process has restarted. If a process terminates abnormally or crashes outside of the process manager, the module status changes to Critical and the health event message indicates the terminated process, until the module runs again and the process has restarted.

Threat Data Updates on Devices

Certain intelligence data and configurations that devices use to detect threats are updated on the FMC from the cloud every 30 minutes.

This module alerts you if this information has not been updated on the devices within the time period you have specified.

Monitored updates include:

• Local URL category and reputation data

• Security Intelligence URL lists and feeds, including global Block and Do Not Block lists and URLs from Threat Intelligence Director

• Security Intelligence network lists and feeds (IP addresses), including global Block and Do Not Block lists and IP addresses from Threat Intelligence Director

• Security Intelligence DNS lists and feeds, including global Block and Do Not Block lists and domains from Threat Intelligence Director

• Local malware analysis signatures (from ClamAV)

• SHA lists from Threat Intelligence Director, as listed on the Objects > Object Management > Security Intelligence > Network Lists and Feeds page

• Dynamic analysis settings configured on the Integration > AMP > Dynamic Analysis Connections page

• Threat Configuration settings related to expiration of cached URLs, including the Cached URLs Expire setting on the System () > Integration > Cloud Services page. (Updates to the URL cache are not monitored by this module.)

• Communication issues with the Cisco cloud for sending events. See the Cisco Cloud box on the System () > Integration> Cloud Services page.

By default, this module sends a warning after 1 hour and a critical alert after 24 hours.

If this module indicates failure on the FMC or on any devices, verify that the FMC can reach the devices.

AMP for Endpoints Status

The module alerts if the FMC cannot connect to the AMP cloud or Cisco AMP Private Cloud after an initial successful connection, or if the private cloud cannot contact the public AMP cloud. It also alerts if you deregister an AMP cloud connection using the AMP for Endpoints management console.

AMP for Firepower Status

This module alerts if:

• The FMC cannot contact the AMP cloud (public or private) or the Secure Malware Analytics Cloud or Appliance, or the AMP private cloud cannot contact the public AMP cloud.

• The encryption keys used for the connection are invalid.

• A device cannot contact the Secure Malware Analytics Cloud or Secure Malware Analytics Appliance to submit files for dynamic analysis.

• An excessive number of files are detected in network traffic based on the file policy configuration.

If your FMC loses connectivity to the Internet, the system may take up to 30 minutes to generate a health alert.

Appliance Heartbeat

This module determines if an appliance heartbeat is being heard from the appliance and alerts based on the appliance heartbeat status.

Database Size

This module checks the size of the configuration database and alerts when the size exceeds the values (in gigabytes) configured for the module.

Discovery Host Limit

This module determines if the number of hosts the FMC can monitor is approaching the limit and alerts based on the warning level configured for the module. For more information, see Host Limit.

Event Backlog Status

This module alerts if the backlog of event data awaiting transmission from the device to the FMC has grown continuously for more than 30 minutes.

To reduce the backlog, evaluate your bandwidth and consider logging fewer events.

Event Monitor

This module monitors overall incoming event rate to FMC.

Event Stream Status

This module monitors connections to third-party client applications that use the Event Streamer on the FMC.

ISE Connection Monitor

This module monitors the status of the server connections between the Cisco Identity Services Engine (ISE) and the FMC. ISE provides additional user data, device type data, device location data, SGTs (Security Group Tags), and SXP (Security Exchange Protocol) services.

License Monitor

This module monitors license expiration.

FMC HA Status

This module monitors and alerts on the high availability status of the FMC. If you have not established FMC high availability, the HA Status is Not in HA.

MySQL Statistics

This module monitors the status of the MySQL database, including the database size, number of active connections, and memory use. Disabled by default.

RabbitMQ Status

This module collects various statistics for RabbitMQ.

RRD Server Process

This module determines if the round robin data server that stores time series data is running properly. The module alerts if the RRD server has restarted since the last time it updated; it enters Critical or Warning status if the number of consecutive updates with an RRD server restart reaches the numbers specified in the module configuration.

Realm

Enables you to set a warning threshold for realm or user mismatches, which are:

• User mismatch: A user is reported to the FMC without being downloaded.

  A typical reason for a user mismatch is that the user belongs to a group you have excluded from being downloaded to the FMC. Review the information discussed in Firepower Management Center Device Configuration Guide.

• Realm mismatch: A user logs into a domain that corresponds to a realm not known to the FMC.

For more information, Firepower Management Center Device Configuration Guide.

This module also displays health alerts when you try to download more users than the maximum number of downloaded users supported per realm. The maximum number of downloaded users for a single realm depends on your management center model.

For more information, see User Limit in the Firepower Management Center Device Configuration Guide

Security Intelligence

This module alerts if Security Intelligence is in use and the FMC cannot update a feed, or feed data is corrupt or contains no recognizable IP addresses.

See also the Threat Data Updates on Devices module.

Smart License Monitor

This module monitors Smart Licensing status and alerts if:

• There is a communication error between the Smart Licensing Agent (Smart Agent) and the Smart Software Manager.

• The Product Instance Registration Token has expired.

• The Smart License usage is out of compliance.

• The Smart License authorization or evaluation mode has expired.

Sybase Statistics

This module monitors the status of the Sybase database on the FMC, including the database size, number of active connections, and memory use.

Time Series Data (RRD) Monitor

This module tracks the presence of corrupt files in the directory where time series data (such as correlation event counts) are stored and alerts when files are flagged as corrupt and removed.

Time Synchronization Status

This module tracks the synchronization of a device clock that obtains time using NTP with the clock on the NTP server and alerts if the difference in the clocks is more than ten seconds.

Unresolved Groups Monitor

Monitors unresolved groups used in policies.

URL Filtering Monitor

This module alerts if the FMC fails to:

• Register with the Cisco cloud.

• Download URL threat data updates from the Cisco cloud.

• Complete URL lookups.

You can configure time thresholds for these alerts.

See also the Threat Data Updates on Devices module.

VPN Status

This module alerts when one or more VPN tunnels between FTD devices are down.

This module tracks:

• Site-to-site VPN for Firepower Threat Defense

• Remote access VPN for Firepower Threat Defense

AMP Connection Status

The module alerts if the FTD cannot connect to the AMP cloud or Cisco AMP Private Cloud after an initial successful connection, or if the private cloud cannot contact the public AMP cloud. Disabled by default.

AMP Threat Grid Connectivity

The module alerts if the FTD cannot connect to the AMP Threat Grid cloud after an initial successful connection.

ASP Drop

This module monitors the connections dropped by the data plane accelerated security path.

Automatic Application Bypass

This module monitors bypassed detection applications.

Chassis Environment Status

This module monitors chassis parameters such as fan speed and chassis temperature, and enables you to set a warning threshold and critical threshold for temperature. The Critical Chassis Temperature (Celsius) default value is 85. The Warning Chassis Temperature (Celsius) default value is 75.

Cluster/HA Failover Status

This module monitors the status of device clusters. The module alerts if:

• A new primary unit is elected to a cluster.

• A new secondary unit joins a cluster.

• A primary or secondary unit leaves a cluster.

Configuration Resource Utilization

This module alerts if the size of your deployed configurations puts a device at risk of running out of memory.

The alert shows you how much memory your configurations require, and by how much this exceeds the available memory. If this happens, re-evaluate your configurations. Most often you can reduce the number or complexity of access control rules or intrusion policies.

Snort Memory Allocation

• Total Snort Memory indicates the memory allotted for the Snort 2 instances running on the FTD device.

• Available Memory indicates the memory allotted by the system for a Snort 2 instance. Note that this value is not just the difference between the Total Snort Memory and the combined memory reserved for other modules. This value is derived after few other computations and then divided by the number of Snort 2 processes.

  A negative Available Memory value indicates that Snort 2 instance does not have enough memory for the deployed configuration. For support, contact Cisco Technical Assistance Center (TAC).

Connection Statistics

This module monitors the connection statistics and NAT translation counts.

Data Plane CPU Usage

This module checks that the average CPU usage of all data plane processes on the device is not overloaded and alerts when CPU usage exceeds the percentages configured for the module. The Warning Threshold % default value is 80. The Critical Threshold % default value is 90.

Snort CPU Usage

This module checks that the average CPU usage of the Snort processes on the device is not overloaded and alerts when CPU usage exceeds the percentages configured for the module. The Warning Threshold % default value is 80. The Critical Threshold % default value is 90.

System CPU Usage

This module checks that the average CPU usage of all system processes on the device is not overloaded and alerts when CPU usage exceeds the percentages configured for the module. The Warning Threshold % default value is 80. The Critical Threshold % default value is 90.

Critical Process Statistics

This module monitors the state of critical processes, their resource consumption, and the restart counts.

Deployed Configuration Statistics

This module monitors statistics about the deployed configuration, such as the number of ACEs and IPS rules.

Firepower Platform Faults

This module generates an alert for platform faults for Firepower 1000, 2100 and Secure Firewall 3100 devices. A fault is a mutable object that is managed by the FMC. Each fault represents a failure in the FTD instance or an alarm threshold that has been raised. During the lifecycle of a fault, it can change from one state or severity to another.

Each fault includes information about the operational state of the affected object at the time the fault was raised. If the fault is transitional and the failure is resolved, then the object transitions to a functional state.

For more information, see the Cisco Firepower 1000/2100 FXOS Faults and Error Messages Guide.

FMC Access Configuration Changes

This module monitors access configuration changes made on the FMC directly using the configure network management-data-interface command.

Flow Offload Statistics

This module monitors hardware flow offload statistics for a managed device.

Hardware Alarms

This module determines if hardware needs to be replaced on a physical managed device and alerts based on the hardware status. The module also reports on the status of hardware-related daemons.

Inline Link Mismatch Alarms

This module monitors the ports associated with inline sets and alerts if the two interfaces of an inline pair negotiate different speeds.

Intrusion and File Event Rate

This module compares the number of intrusion events per second to the limits configured for this module and alerts if the limits are exceeded. If the Intrusion and File Event Rate is zero, the intrusion process may be down or the managed device may not be sending events. Select Analysis > Intrusions > Events to check if events are being received from the device.

Typically, the event rate for a network segment averages 20 events per second. For a network segment with this average rate, Events per second (Critical) should be set to 50 and Events per second (Warning) should be set to 30. To determine limits for your system, find the Events/Sec value on the Statistics page for your device (System () > Monitoring > Statistics), then calculate the limits using these formulas:

• Events per second (Critical) = Events/Sec * 2.5

• Events per second (Warning) = Events/Sec * 1.5

The maximum number of events you can set for either limit is 999, and the Critical limit must be higher than the Warning limit.

Link State Propagation

ISA 3000 only.

This module determines when a link in a paired inline set fails and triggers the link state propagation mode. If a link state propagates to the pair, the status classification for that module changes to Critical and the state reads:

Module Link State Propagation: ethx_ethy is Triggered

where x and y are the paired interface numbers.

Memory Usage Data Plane

This module checks the percentage of allocated memory used by the Data Plane processes and alerts when memory usage exceeds the percentages configured for the module. The Warning Threshold % default value is 80. The Critical Threshold % default value is 90.

Memory Usage Snort

This module checks the percentage of allocated memory used by the Snort process and alerts when memory usage exceeds the percentages configured for the module. The Warning Threshold % default value is 80. The Critical Threshold % default value is 90.

Network Card Reset

This module checks for network cards which have restarted due to hardware failure and alerts when a reset occurs.

NTP Statistics

This module monitors the NTP clock synchronization status of the managed device. Disabled by default.

Power Supply

This module determines if power supplies on the appliance require replacement and alerts based on the power supply status.

Routing Statistics

This module monitors the current state of routing table.

Snort3 Statistics

This module collects and monitors the Snort 3 statistics for events, flows, and packets.

Snort Identity Memory Usage

Enables you to set a warning threshold for Snort identity processing and alerts when memory usage exceeds the level configured for the module. The Critical Threshold % default value is 80.

This health module specifically keeps track of the total space used for the user identity information in Snort. It displays the current memory usage details, the total number of user-to-IP bindings, and user-group mapping details. Snort records these details in a file. If the memory usage file is not available, the Health Alert for this module displays Waiting for data. This could happen during a Snort restart due to a new install or a major update, switch from Snort 2 to Snort 3 or back, or major policy deployment. Depending on the health monitoring cycle, and when the file is available, the warning disappears, and the health monitor displays the details for this module with its status turned Green.

Snort Reconfiguring Detection

This module alerts if a device reconfiguration has failed. This module detects reconfiguration failure for both Snort 2 and Snort 3 instances.

Snort Statistics

This module monitors the Snort statistics for events, flows, and packets.

Security Services Exchange Connection Status

The module alerts if the FTD cannot connect to the security services exchange cloud after an initial successful connection. Disabled by default.

FTD HA (Split-brain check)

This module monitors and alerts on the high availability status of the FTD and provides a health alert for a split brain scenario. If you have not established FTD high availability, the HA Status is Not in HA.

VPN Statistics

This module monitors site-to-site and remote access VPN tunnels between FTD devices.

XTLS Counters

This module monitors XTLS/SSL flows, memory and cache effectiveness. Disabled by default.