FortiOS 5.4.1 Release Notes

Known Issues

The following issues have been identified in version 5.4.1. For inquires about a particular bug or to report a bug, please contact CustomerService & Support.


Bug ID Description
374969 FortiSandbox FortiView may not correctly parse the FSA v2.21 tracer file(.json)
Bug ID Description
367514 Executable files may not be blocked by DLP built-in exe file-type filter.
Bug ID Description
357360 DHCP snooping does not work on IPv6.
374346 Adding or reducing stacking connections may block traffic for 20 seconds.

Endpoint Control

Bug ID Description
375149 FGT does not auto update AV signature version while Endpoint Control is enabled.
374855 Third party compliance may not be reported if FortiClient has no AV feature.


Bug ID Description
372556 FortiGate-98D-POE hardware switch jumbo frame may not work as expected.


Bug ID Description
375246 invalid hbdev dmz may be received if the default hbdev is used.



Bug ID Description
369099 FortiSwitch authorizes successfully, but fails to pass traffic until you reboot FortiSwitch.
357360 DHCP snooping may not work on IPv6.
304199 Using HA with FortiLink can encounter traffic loss during failover.


Bug ID Description
289376 Applying the filter All by using the right click method may not work in the All Sessions page.
303940 Web Site > Security Action filter may not work.
373142 Threat: Filter result may not be correct when adding a filter on a threat and threat type on the first level.
366627 FortiView Cloud Application my display the incorrect drill down File and Session list in the Applications View.
374947 FortiView may show empty country in the IPv6 traffic because country info is missing in log.
372350 Threat view: Threat Type and Event information are missing in the last level of the threat view.
375187 Using realtime auto update may increase chrome browser memory usage.
368644 Physical Topology: Physical Connection of stacked FortiSwitch may be incorrect.
375172 FortiGate under a FortiSwitch may be shown directly connected to an upstream FortiGate.
372897 Invalid -4 and invalid 254 is shown as the submitted file status.
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About Mike

Michael Pruett, CISSP has a wide range of cyber-security and network engineering expertise. The plethora of vendors that resell hardware but have zero engineering knowledge resulting in the wrong hardware or configuration being deployed is a major pet peeve of Michael's. This site was started in an effort to spread information while providing the option of quality consulting services at a much lower price than Fortinet Professional Services. Owns PacketLlama.Com (Fortinet Hardware Sales) and Office Of The CISO, LLC (Cybersecurity consulting firm).

3 thoughts on “FortiOS 5.4.1 Release Notes

  1. David

    FYI. I ran into a terrible problem using a Fortigate VM00. 5.4.1 will not run because the virtual appliance only has 1GB of memory available. Fortinet was nice enough to diagnose the problem, but really does not have an easy way of upgrading to the 2GB virtual appliance.

  2. Pablo

    Problems of download speed, I have a fortigate 30e and I have problems in the download speed 4.2 mbps, instead in upload speed is correct 89.55 mbps, I do not know where the problem may come from. I have version 5.4.1 build1064. You can help me.


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