Fortinet 638 FortiWeb 5.0 Patch 6 Administration Guide
Figure 88:Viewing sniffer output in Wireshark
For additional information on packet capture, see the Fortinet Knowledge Base article Using
the FortiOS built-in packet sniffer.
For more information on CLI commands, see the FortiWeb CLI Reference.

Diagnostic commands in the CLI

Most diagnostic tools are in the CLI — they are not available from the web UI. Many are shown
in “Solutions by issue type” on page 640. For more information on diagnose and other CLI
commands, see the FortiWeb CLI Reference.
How to troubleshoot
If you are new to troubleshooting network appliances in general, this section outlines some
basic skills.

Establishing a system baseline

Before you can define an abnormal operation, you need to know what normal operation is.
When there is a problem, a baseline for normal operation helps you to define what is wrong or
changed.
Baseline information can include:
• Logging (see “Enabling log types, packet payload retention, & resource shortage alerts” on
page 546)
• Monitoring performance statistics such as memory usage (see “System Resources widget”
on page 536 and “SNMP traps & queries” on page 580)
• Regular backups of the FortiWeb appliance's configuration (see “Backups” on page 206)