Troubleshooting

This section is intended for administrators with super_admin permissions who require assistance with basic and advanced troubleshooting. Administrators with other types of permissions may not be able to perform all of the tasks in this section.

This section contains the following troubleshooting topics:

• Troubleshooting methodologies

• Connectivity Fault Management NEW

• Troubleshooting scenarios

  • Checking the system date and time

  • Checking the hardware connections

  • Checking FortiOS network settings

  • Checking CPU and memory resources

  • FortiGuard server settings

  • Troubleshooting high CPU usage

  • Checking the modem status

  • Running ping and traceroute

  • Checking the logs

  • Verifying routing table contents in NAT mode

  • Verifying the correct route is being used

  • Verifying the correct firewall policy is being used

  • Checking the bridging information in transparent mode

  • Checking wireless information

  • Performing a sniffer trace or packet capture

  • Debugging the packet flow

  • Testing a proxy operation

  • Displaying detail Hardware NIC information

  • Performing a traffic trace

  • Using a session table

  • Finding object dependencies

  • Diagnosing NPU-based interfaces

  • Identifying the XAUI link used for a specific traffic stream

  • Running the TAC report

  • Using the process monitor

  • Computing file hashes

  • Other commands

  • FortiGuard troubleshooting

  • View open and in use ports

• CLI troubleshooting cheat sheet

• Additional resources