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</p> Signup and view all the answers

    What command can be used to manually terminate a process?

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

    When is it usually required to manually terminate a process?

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

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

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

    What can happen if a process is improperly terminated?

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

    What is the termination signal for an alarm clock?

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

    What does the command diagnose sys top do?

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

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

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

    What information is highlighted in the FortiGate session table?

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

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

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

    What does the UDP example in the session table represent?

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

    What should you use before clearing out any sessions?

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

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

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

    Which process is related to the FortiGate feature that failed?

    <p>sslvpnd</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</p> Signup and view all the answers

    What information does the FortiGate session table contain?

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

    Which command can be used to clear existing sessions?

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

    What should be done before displaying detailed information about sessions?

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

    What can a crash log entry provide information about?

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

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