Crash Dump Messages and Retrieval Quiz
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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?

<p>9 (B)</p> Signup and view all the answers

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

<p>When a process is unresponsive (A)</p> Signup and view all the answers

Which termination signal number generates a crash log?

<p>11 (A)</p> Signup and view all the answers

When can a crash log entry be considered suspicious?

<p>When it happens at the same time as an abnormal FortiGate behavior (A)</p> Signup and view all the answers

What information can the crash log provide to Fortinet developers?

<p>The cause of the crash (D)</p> Signup and view all the answers

Which process manages SSL-VPN connections on FortiGate?

<p>sslvpnd process (C)</p> Signup and view all the answers

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

<p>11 (C)</p> Signup and view all the answers

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

<p>Logs, console logs, and crash log (A)</p> Signup and view all the answers

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

<p>Keep a laptop connected to the console port and capture the crash dump message (D)</p> Signup and view all the answers

What is a crash dump message?

<p>A message generated through the console port when the device crashes (A)</p> Signup and view all the answers

What can crash dump messages provide to Fortinet developers?

<p>Useful information (A)</p> Signup and view all the answers

What should you do if a FortiGate device freezes?

<p>Push the NMI button while the laptop is connected to generate the crash dump (C)</p> Signup and view all the answers

What is the NMI watchdog?

<p>A feature that crashes the system if it has not scheduled any daemon in 10 minutes (A)</p> Signup and view all the answers

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

<p>Power cycle the device (B)</p> Signup and view all the answers

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

<p>Wait until another crash happens to capture the crash dump message (A)</p> Signup and view all the answers

What happens when a FortiGate device freezes?

<p>It stops handling traffic, you cannot connect to it, and you can’t access its console port (B)</p> Signup and view all the answers

What should you do if a FortiGate device restarts unexpectedly?

<p>Check logs, console logs, and crash log (C)</p> 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.

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