Crashlog Diagnostics and Debugging Techniques Quiz

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Questions and Answers

Which entry is generated in the crash log when an application crashes?

  • The name of the application
  • The time it crashed
  • The termination signal
  • All of the above (correct)

Which process failed in the sample crash log provided?

  • sslvpnd process (correct)
  • diagnose sys kill
  • FortiOS
  • Crashlog Tips

What is the termination signal for a segmentation fault?

  • 4, Illegal instruction
  • 7, Bus error
  • 11, Invalid memory reference (correct)
  • 6, Abort command from FortiOS

When can a crashlog be considered suspicious?

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

What command can be used to manually terminate a process?

<p>diagnose sys kill (C)</p> Signup and view all the answers

When is it usually required to manually terminate a process?

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

What termination signal should be used when manually terminating a process?

<p>9, Unconditional kill (C)</p> Signup and view all the answers

What can happen if a process is improperly terminated?

<p>The FortiGate system may become unstable (C)</p> Signup and view all the answers

What is the termination signal for an alarm clock?

<p>14, Alarm Clock (D)</p> Signup and view all the answers

What does the command diagnose sys top do?

<p>Lists the process ID numbers (C)</p> Signup and view all the answers

Which command should you use to remove all sessions that match the session filter?

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

What should you be careful about when using the command to clear sessions?

<p>It can potentially clear all existing sessions (D)</p> Signup and view all the answers

What information is highlighted in the FortiGate session table?

<p>IP protocol number and protocol state (C)</p> Signup and view all the answers

What does the length of time until the session expires indicate?

<p>No more traffic (C)</p> Signup and view all the answers

What does the UDP example in the session table represent?

<p>Sample of the output (A)</p> Signup and view all the answers

What does the NAT portion of the session table show?

<p>Type of NAT and NAT IP-address (B)</p> Signup and view all the answers

What does the session table display for transmitted packet and byte counters?

<p>Received and transmitted packet and byte counters (B)</p> Signup and view all the answers

What does the session table show for the source MAC address of the packet?

<p>Source MAC address (D)</p> Signup and view all the answers

What should you use before clearing out any sessions?

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

What does the session table display for counters related to hardware acceleration?

<p>Counters for hardware acceleration (C)</p> Signup and view all the answers

Which process is related to the FortiGate feature that failed?

<p>sslvpnd (C)</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 a failure in a FortiGate feature (D)</p> Signup and view all the answers

What information does the FortiGate session table contain?

<p>Detailed information about every IP connection (C)</p> Signup and view all the answers

Which command can be used to display the total number of sessions in an active V-Dom?

<p>get sys session list (B)</p> Signup and view all the answers

What can be used to filter the output of the 'diagnose sys session list' command?

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

What happens to existing sessions when certain configuration changes are made?

<p>They continue using the previous configuration until they expire or are terminated (D)</p> Signup and view all the answers

Which command can be used to clear existing sessions?

<p>diagnose sys session clear (B)</p> Signup and view all the answers

What should be done before displaying detailed information about sessions?

<p>Set the session filter (D)</p> Signup and view all the answers

What can a crash log entry provide information about?

<p>The cause of an unexpected restart (B)</p> Signup and view all the answers

When should a crash log entry be considered suspicious?

<p>When it happens at the same time as a failure in a FortiGate feature (C)</p> Signup and view all the answers

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