Troubleshooting Tip: Windows Agent Show Registered...

froslan · 12-01-2025

Description This article describes how to resolve the issue of being unable to access the FortiSIEM GUI by the admin user account due to the Trusted Host restriction. Scope FortiSIEM. Solution To resolve the issue of being unable to access the FortiS...

froslan · 12-01-2025

Description This article describes a FortiSIEM database error that occurs when importing rules, resulting in duplicated rules that cannot be deleted from the graphical user interface (GUI) and provides a step-by-step solution to resolve this issue by...

froslan · 10-30-2025

Description This article explains how to test a correlation rule that uses the NOT FOLLOWED BY operator in FortiSIEM to verify that the rule triggers incidents correctly when the second event does not occur within a defined time frame. Scope FortiSIE...

froslan · 10-29-2025

Description This article explains the steps to resolve the System.MissingMethodException error observed in Trace.log when the Windows Agent is registered in the FortiSIEM GUI, but no events are being uploaded. Scope FortiSIEM. Solution Windows Agent ...

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Troubleshooting Tip: Removing Trusted Host restriction to restore admin GUI access in FortiSIEM

Troubleshooting Tip: FortiSIEM Database Error on Importing Rules Resulting in Duplication

Troubleshooting Tip: How to Test a 'NOT FOLLOWED BY' Rule with Multiple Events and a Time Frame