Fortigate Crash Log Analysis: Dump Messages Quiz and Flashcards

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Questions and Answers

Which feature can automatically cause a crash in the system and force a crash dump when no new daemons have been scheduled in the last 10 minutes?

NAT feature

NMI watchdog feature (correct)

Firewall feature

VPN feature

What is the purpose of the external NMI button on some FortiGate models?

To generate crash dump messages (correct)

To terminate a process manually

To freeze the device

To restart the device

What information is included in an entry in the crash log?

The name of the application that failed

The time the application crashed

The termination signal

All of the above (correct)

What is the termination signal number for an unconditional kill?

9 Signup and view all the answers

When is it usually required to manually terminate a process on a FortiGate system?

When a process is unresponsive Signup and view all the answers

Which termination signal number generates a crash log?

11 Signup and view all the answers

When can a crash log entry be considered suspicious?

When it happens at the same time as an abnormal FortiGate behavior Signup and view all the answers

What information can the crash log provide to Fortinet developers?

The cause of the crash Signup and view all the answers

Which process manages SSL-VPN connections on FortiGate?

sslvpnd process Signup and view all the answers

What is the most common termination signal number for a segmentation fault?

11 Signup and view all the answers

What should you check after an unexpected restart of a FortiGate device?

Logs, console logs, and crash log Signup and view all the answers

What should you do if the FortiGate model doesn't support console logs?

Keep a laptop connected to the console port and capture the crash dump message Signup and view all the answers

What is a crash dump message?

A message generated through the console port when the device crashes Signup and view all the answers

What can crash dump messages provide to Fortinet developers?

Useful information Signup and view all the answers

What should you do if a FortiGate device freezes?

Push the NMI button while the laptop is connected to generate the crash dump Signup and view all the answers

What is the NMI watchdog?

A feature that crashes the system if it has not scheduled any daemon in 10 minutes Signup and view all the answers

What should you do if a FortiGate device freezes and you cannot access its console port?

Power cycle the device Signup and view all the answers

What should you do if a FortiGate model doesn't have an NMI button?

Wait until another crash happens to capture the crash dump message Signup and view all the answers

What happens when a FortiGate device freezes?

It stops handling traffic, you cannot connect to it, and you can’t access its console port Signup and view all the answers

What should you do if a FortiGate device restarts unexpectedly?

Check logs, console logs, and crash log Signup and view all the answers

Study Notes

Crash Handling and Debugging

The kernel can automatically cause a crash and force a crash dump when no new daemons have been scheduled in the last 10 minutes.
The external NMI button on some FortiGate models is used to trigger a crash dump for debugging purposes.

Crash Log

A crash log entry includes information about the crash, such as the reason for the crash and the process that crashed.
A crash log entry can be considered suspicious if it reveals unusual or unidentified crash causes.
Crash logs provide Fortinet developers with information about the crash, which helps them troubleshoot and fix issues.

Process Termination

The termination signal number for an unconditional kill is 9 (SIGKILL).
Signal number 6 (SIGABRT) generates a crash log.
It is usually required to manually terminate a process on a FortiGate system when it is consuming excessive resources or is unresponsive.

Crash Dump and Freeze

A crash dump message is a file containing information about a system crash.
Crash dump messages provide Fortinet developers with detailed information about the crash, helping them identify and fix issues.
The NMI watchdog is a feature that monitors the system and triggers a crash dump if it freezes.
If a FortiGate device freezes, it is recommended to press the NMI button (if available) to trigger a crash dump.
If the device freezes and you cannot access its console port, try using the NMI button or check the crash log for information.
If a FortiGate model doesn't have an NMI button, you can try restarting the device or checking the crash log for information.
After an unexpected restart of a FortiGate device, check the crash log and system logs for information about the crash.
If a FortiGate model doesn't support console logs, check the crash log and system logs for information about the crash.

SSL-VPN

The process that manages SSL-VPN connections on FortiGate is not specified in the text.

segmentation fault

The most common termination signal number for a segmentation fault is 11 (SIGSEGV).

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Description

Test your knowledge on crash dump messages and how to retrieve them in this quiz. Learn about console logs, crash logs, and how to capture a crash dump message with a laptop. Keywords: crash dump message, console logs, crash logs, device crashes, laptop.

Crash Dump Messages and Retrieval Quiz