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simonz_FTNT
Staff & Editor
Staff & Editor
November 21, 2025

Technical Tip: Antivirus oversize logging

  • November 21, 2025
  • 0 replies
  • 516 views
Description This article describes the behaviour of Antivirus UTM logging. By default, it only logs when the files are infected or blocked, but does not log clean or scanned files, including oversized files.
Scope FortiGate.
Solution

The below option is to enable oversize files logging if needed, for details on the oversize files that bypassed scanning.

From the GUI:

Navigate to Policy & Objects -> Protocol Options -> Select the Profile -> Edit -> Enable oversize-log and select OK:

AV.png

 

From the CLI:

 

config firewall profile-protocol-options

    edit <protocol profile>

        set oversize-log enable

end

 

The default oversize limit is 10MB.

Refer to this KB article about configuring the oversize limit: Technical Tip: Maximum oversize threshold.

 

oversize.png