FortiOS 5.4.2 Release Notes


This document provides the following information for FortiOS 5.4.2 build 1100:

  • Special Notices
  • Upgrade Information
  • Product Integration and Support
  • Resolved Issues
  • Known Issues
  • Limitations

See the Fortinet Document Library for FortiOS documentation.

Supported models

FortiOS 5.4.2 supports the following models.

FortiGate FG-30D, FG-30E, FG-30D-POE, FG-50E, FG-51E, FG-60D, FG-60D-POE, FG-70D,

FG-70D-POE, FG-80C, FG-80CM, FG-80D, FG-90D FG-90D, FG-90D-POE, FG92D, FG-94D-POE, FG-98D-POE, FG-100D, FG-140D, FG-140D-POE, FG- 200D,

FG-200D-POE, FG-240D, FG-240D-POE, FG-280D-POE, FG-300D, FG-400D, FG500D, FG-600C, FG-600D, FG-800C, FG-800D, FG-900D, FG-1000C, FG-1000D,

FG-1200D, FG-1500D, FG-1500DT, FG-3000D, FG-3100D, FG-3200D, FG-3240C,

FG-3600C, FG-3700D, FG-3700DX, FG-3810D, FG-3815D, FG-5001C, FG-5001D

FortiWiFi FWF-30D, FWF-30E, FWF-30D-POE, FWF-50E, FWF-51E, FWF-60D, FWF-60DPOE, FWF-80CM, FWF-81CM, FWF-90D, FWF-90D-POE, FWF-92D
FortiGate Rugged FGR-60D, FGR-90D
Pay-as-you-go images FOS-VM64, FOS-VM64-KVM
FortiOS Carrier FortiOS Carrier 5.4.2 images are delivered upon request and are not available on the customer support firmware download page.


What’s new in FortiOS 5.4.2

For a detailed list of new features and enhancements that have been made in FortiOS 5.4.2, see the What’s New for FortiOS 5.4.2 document available in the Fortinet Document Library.

Special Notices

Built-In Certificate

FortiGate and FortiWiFi D-series and above have a built in Fortinet_Factory certificate that uses a 2048-bit certificate with the 14 DH group.

Default log setting change

For FG-5000 blades, log disk is disabled by default. It can only be enabled via CLI. For all 2U & 3U models (FG3600/FG-3700/FG-3800), log disk is also disabled by default. For all 1U models and desktop models that supports SATA disk, log disk is enabled by default.

FortiAnalyzer Support

In version 5.4, encrypting logs between FortiGate and FortiAnalyzer is handled via SSL encryption. The IPsec option is no longer available and users should reconfigure in GUI or CLI to select the SSL encryption option as needed.


SSL/HTTPS/SMTPS/IMAPS/POP3S options were removed from server-load-balance on low end models below FG-100D except FG-80C and FG-80CM.

FortiGate and FortiWiFi-92D Hardware Limitation

FortiOS 5.4.0 reported an issue with the FG-92D model in the Special Notices > FG-92D High Availability in Interface Mode section of the release notes. Those issues, which were related to the use of port 1 through 14, include:

  • PPPoE failing, HA failing to form l IPv6 packets being dropped l FortiSwitch devices failing to be discovered
  • Spanning tree loops may result depending on the network topology

FG-92D and FWF-92D do not support STP. These issues have been improved in FortiOS 5.4.1, but with some side effects with the introduction of a new command, which is enabled by default:

config global set hw-switch-ether-filter <enable | disable>


When the command is enabled:

  • ARP (0x0806), IPv4 (0x0800), and VLAN (0x8100) packets are allowed l BPDUs are dropped and therefore no STP loop results l PPPoE packets are dropped l IPv6 packets are dropped l FortiSwitch devices are not discovered l HA may fail to form depending the network topology

When the command is disabled:

  • All packet types are allowed, but depending on the network topology, an STP loop may result

FG-900D and FG-1000D

CAPWAP traffic will not offload if the ingress and egress traffic ports are on different NP6 chips. It will only offload if both ingress and egress ports belong to the same NP6 chip.


CAPWAP Tunnel over the GRE tunnel (CAPWAP + TP2 card) is not supported.

FortiGate units running 5.4.2 and managed by FortiManager 5.0 or 5.2

FortiGate units running 5.4.2 and managed by FortiManager 5.0.0 or 5.2.0 may report installation failures on newly created VDOMs, or after a factory reset of the FortiGate unit even after a retrieve and re-import policy.

FortiClient Support

Only FortiClient 5.4.1 and later is supported with FortiOS 5.4.1 and later. Upgrade managed FortiClients to 5.4.1 or later before upgrading FortiGate to 5.4.1 or later.

Note that the FortiClient license should be considered before upgrading.

Full featured FortiClient 5.2, and 5.4 licenses will carry over into FortiOS 5.4.1 and later. Depending on the environment needs, FortiClient EMS license may need to be purchased for endpoint provisioning. Please consult Fortinet Sales or your reseller for guidance on the appropriate licensing for  your organization.

The perpetual FortiClient 5.0 license (including the 5.2 limited feature upgrade) will not carry over into FortiOS 5.4.1 and later. A new license will need to be procured for either FortiClient EMS or FortiGate. To verify if a license purchase is compatible with 5.4.1 and later, the SKU should begin with FC-10-C010

FortiClient (Mac OS X) SSL VPN Requirements

When using SSL VPN on Mac OS X 10.8, you must enable SSLv3 in FortiOS.

FortiGate-VM 5.4 for VMware ESXi

Upon upgrading to FortiOS 5.4.2, FortiGate-VM v5.4 for VMware ESXi (all models), no longer supports the VMXNET2 vNIC driver.

FortiClient Profile Changes

With introduction of the Cooperative Security Fabric in FortiOS v5.4.1, FortiClient profiles will be updated on FortiGate. FortiClient profiles and FortiGate are now primarily used for Endpoint Compliance, and FortiClient Enterprise Management Server (EMS) is now used for FortiClient deployment and provisioning.

In the FortiClient profile on FortiGate, when you set the Non-Compliance Action setting to Auto-Update, the FortiClient profile supports limited provisioning for FortiClient features related to compliance, such as AntiVirus, Web Filter, Vulnerability Scan, and Application Firewall. When you set the Non-Compliance Action setting to Block or Warn, you can also use FortiClient EMS to provision endpoints, if they require additional other features, such as VPN tunnels or other advanced options. For more information, see the FortiOS Handbook – Security Profiles.

When you upgrade to FortiOS 5.4.1 and later, the FortiClient provisioning capability will no longer be available in FortiClient profiles on FortiGate. FortiGate will be used for endpoint compliance and Cooperative Security Fabric integration, and FortiClient Enterprise Management Server (EMS) should be used for creating custom FortiClient installers as well as deploying and provisioning FortiClient on endpoints. For more information on licensing of EMS, contact your sales representative.



FortiPresence users must change the FortiGate web administration TLS version in order to allow the connections on all versions of TLS. Use the following CLI command.

config system global set admin-https-ssl-versions tlsv1-0 tlsv1-1 tlsv1-2


Log Disk Usage

Users are able to toggle disk usage between Logging and WAN Optimization for single disk FortiGates.

To view a list of supported FortiGate models, refer to the FortiOS 5.4.0 Feature Platform Matrix.

SSL VPN setting page

The default server certificate has been changed to the Fortinet_Factory option. This excludes FortiGateVMs which remain at the self-signed option. For details on importing a CA signed certificate, please see the How to purchase and import a signed SSL certificate document.

Upgrade Information

Upgrading to FortiOS 5.4.2

FortiOS version 5.4.2 officially supports upgrading from version 5.4.0 and 5.2.7.

When upgrading from a firmware version beyond those mentioned in the Release Notes, a recommended guide for navigating the upgrade path can be found on the Fortinet documentation site.

There is separate version of the guide describing the safest upgrade path to the latest patch of each of the supported versions of the firmware. To upgrade to this build, go to FortiOS 5.4 Supported Upgrade Paths

Cooperative Security Fabric Upgrade

FortiOS 5.4.1 and later greatly increases the interoperability between other Fortinet products. This includes:

  • FortiClient 5.4.1 and later l FortiClient EMS 1.0.1 and later l FortiAP 5.4.1 and later l FortiSwitch 3.4.2 and later

The upgrade of the firmware for each product must be completed in a precise order so the network connectivity is maintained without the need of manual steps. Customers must read the following two documents prior to upgrading any product in their network:

  • Cooperative Security Fabric – Upgrade Guide
  • FortiOS 5.4.x Upgrade Guide for Managed FortiSwitch Devices

This document is available in the Customer Support Firmware Images download directory for FortiSwitch 3.4.2.

Model-60D Boot Issue

The following 60D models have an issue upon upgrading to FortiOS 5.4.1. The second disk (flash) is unformatted and results in the /var/log/ directory being mounted to an incorrect partition used exclusively for storing the firmware image and booting.

  • FG-60D-POE
  • FG-60D
  • FWF-60D-POE
  • FWF-60D

To fix the problem:


If your FortiGate device is currently running FortiOS 5.2.7:

  1. Backup your configuration.
  2. Upgrade to 5.4.1 B5447.

If your FortiGate device is currently running FortiOS 5.4.0 or 5.4.1:

  1. Backup your configuration.
  2. Connect to the console port of the FortiGate device.
  3. Reboot the system and enter the BIOS menu.
  4. Burn the firmware image to the primary boot device.
  5. Once the system finishes rebooting, restore your configuration.

FortiClient Profiles

After upgrading from FortiOS 5.4.0 to 5.4.1, your FortiClient profiles will be changed to remove a number of options that are no longer supported. After upgrading you should review your FortiClient profiles to make sure they are configured appropriately for your requirements and either modify them if required or create new ones.

The following FortiClient Profile features are no longer supported by FortiOS 5.4.1:

  • Advanced FortiClient profiles (XML configuration)
  • Advanced configuration, such as configuring CA certificates, unregister option, FortiManager updates, dashboard

Banner, client-based logging when on-net, and Single Sign-on Mobility Agent l VPN provisioning l Advanced AntiVirus settings, such as Scheduled Scan, Scan with FortiSandbox, and Excluded Paths l Client-side web filtering when on-net

  • iOS and Android configuration by using the FortiOS GUI

It is recommended that FortiClient Enterprise Management Server (EMS) should used for detailed Endpoint deployment and provisioning.

Unified Disk Usage

FortiOS 5.4.2 changes the disk usage behavior upon upgrading from FortiOS 5.2. The table below describes the new logging and WAN Optimization disk usage for single and two disk FortiGate devices running FortiOS 5.4.2.

Single Disk Platforms (Logging or WAN Optimization)
                                                   Only Logging enabled          No change.
Only WAN Optimization           No change. enabled


Both Logging & WAN Disk is reserved for logging. If WAN Optimization Optimization enabled is configured, the WAN Optimization cache is lost.
Two Disk Platforms (First disk reserved for Logging; second reserved for WAN Optimization)
                                                   Only Logging enabled on     No change.

the first disk

Only Logging enabled on        Logging is changed to the first disk. Logging data the second disk    is lost on the second disk.
Only WAN Optimization WAN Optimization is changed to the second disk. enabled on the first disk WAN Optimization cache is lost on the first disk.
Only WAN Optimization Second disk reserved for WAN Optimization. First enabled on the second disk reserved for logging even when the log disk disk status CLI command is disabled: log-disk-


Both Logging & WAN First disk reserved for logging. Second disk Optimization enabled reserved for WAN Optimization.

FortiGate-VM 5.4 for VMware ESXi

Upon upgrading to FortiOS 5.4.2, FortiGate-VM v5.4 for VMware ESXi (all models), no longer supports the VMXNET2 vNIC driver.

Downgrading to previous firmware versions

Downgrading to previous firmware versions results in configuration loss on all models. Only the following settings are retained:

  • operation mode
  • interface IP/management IP
  • static route table
  • DNS settings
  • VDOM parameters/settings
  • admin user account
  • session helpers
  • system access profiles.

When downgrading from 5.4 to 5.2, users will need to reformat the log disk.


Amazon AWS Enhanced Networking Compatibility Issue

Due to this new enhancement, there is a compatibility issue with older AWS VM versions. After downgrading a 5.4.1 or later image to an older version, network connectivity is lost. Since AWS does not provide console access, you cannot recover the downgraded image.

Downgrading to older versions from 5.4.1 or later running the enhanced nic driver is not allowed. The following AWS instances are affected:

  • C3
  • C4
  • R3
  • I2
  • M4
  • D2

FortiGate VM firmware

Fortinet provides FortiGate VM firmware images for the following virtual environments:

Citrix XenServer and Open Source XenServer

  • .out: Download the 64-bit firmware image to upgrade your existing FortiGate VM installation.
  • Download the 64-bit package for a new FortiGate VM installation. This package contains the QCOW2 file for Open Source XenServer.
  • Download the 64-bit package for a new FortiGate VM installation. This package contains the Citrix XenServer Virtual Appliance (XVA), Virtual Hard Disk (VHD), and OVF files.

Linux KVM

  • .out: Download the 64-bit firmware image to upgrade your existing FortiGate VM installation.
  • Download the 64-bit package for a new FortiGate VM installation. This package contains QCOW2 that can be used by qemu.

Microsoft Hyper-V

  • .out: Download the 64-bit firmware image to upgrade your existing FortiGate VM installation.
  • Download the 64-bit package for a new FortiGate VM installation. This package contains three folders that can be imported by Hyper-V Manager on Hyper-V 2012. It also contains the file vhd in the Virtual Hard Disks folder that can be manually added to the Hyper-V Manager.

VMware ESX and ESXi

  • .out: Download either the 64-bit firmware image to upgrade your existing FortiGate VM installation.
  • Download either the 64-bit package for a new FortiGate VM installation. This package contains Open Virtualization Format (OVF) files for VMware and two Virtual Machine Disk Format (VMDK) files used by the OVF file during deployment.


Firmware image checksums

The MD5 checksums for all Fortinet software and firmware releases are available at the Customer Service & Support portal, After logging in select Download > Firmware Image Checksums, enter the image file name including the extension, and select Get Checksum Code.


Product Integration and Support

FortiOS 5.4.2 support

The following table lists 5.4.2 product integration and support information:

Web Browsers                                l Microsoft Edge 25

  • Microsoft Internet Explorer 11 l Mozilla Firefox version 46 l Google Chrome version 50
  • Apple Safari version 9.1 (For Mac OS X)

Other web browsers may function correctly, but are not supported by


Explicit Web Proxy Browser            l Microsoft Edge 25

  • Microsoft Internet Explorer 11 l Mozilla Firefox version 45 l Apple Safari version 9.1 (For Mac OS X)
  • Google Chrome version 51

Other web browsers may function correctly, but are not supported by


FortiManager                                    For the latest information, see the FortiManagerand FortiOS


You should upgrade your FortiManager prior to upgrading the FortiGate.

FortiAnalyzer                                    For the latest information, see the FortiAnalyzerand FortiOS


You should upgrade your FortiAnalyzer prior to upgrading the FortiGate.

FortiClient Microsoft Win-              5.4.1

dows and FortiClient Mac           If FortiClient is being managed by a FortiGate, you must upgrade

OS X                                            FortiClient before upgrading the FortiGate.

FortiClient iOS                                5.4.1
FortiClient Android and                   5.4.0

FortiClient VPN Android

FortiOS 5.4.2 support

FortiAP 5.4.1 5.2.5 and later

You should verify what the new FortiAP version is for your FortiAP prior to upgrading the FortiAP units. You can do this by going to the WiFi Controller > Managed Access Points > Managed FortiAP page in the GUI. Under the

OS Version column you will see a message reading A recommended update is available for any FortiAP that is running an earlier version than what is recommended.

FortiAP-421E and FortiAP-423E platforms only: Please call customer support for the FortiGate WiFi Controller image to manage these FortiAP models.

FortiAP-S 5.4.2 and later
FortiSwitch OS (FortiLink support) 3.4.2 and later
FortiController 5.2.0 and later

Supported models: FCTL-5103B, FCTL-5903C, FCTL-5913C, 5.0.3 and later

Supported model: FCTL-5103B

FortiSandbox 2.1.0 and later , 1.4.0 and later
Fortinet Single Sign-On (FSSO) 5.0 build 0250 and later (needed for FSSO agent support OU in group filters)

Windows Server 2008 (32-bit and 64-bit) l Windows Server 2008 R2 64-bit, Windows Server 2012 Standard , Windows Server 2012 R2 Standard, Novell eDirectory 8.8

4.3 build 0164 (contact Support for download), Windows Server 2003 R2 (32-bit and 64-bit), Windows Server 2008 (32-bit and 64-bit), Windows Server 2008 R2 64-bit, Windows Server 2012 Standard Edition, Windows Server 2012 R2, Novell eDirectory 8.8

FSSO does not currently support IPv6.


FortiExplorer , 2.6 build 1083 and later.

Some FortiGate models may be supported on specific FortiExplorer versions.

FortiExplorer iOS 1.0.6 build 0130 and later

Some FortiGate models may be supported on specific FortiExplorer iOS versions.

FortiExtender 3.0.0

2.0.2 build 0011 and later

AV Engine 5.234
IPS Engine 3.294
Virtualization Environments  
Citrix XenServer version 5.6 Service Pack 2, XenServer version 6.0 and later
Linux KVM RHEL 7.1/Ubuntu 12.04 and later, CentOS 6.4 (qemu 0.12.1) and later
Microsoft Hyper-V Server 2008 R2, 2012, and 2012 R2
Open Source XenServer version 3.4.3, XenServer version 4.1 and later
VMware ESX versions 4.0 and 4.1

ESXi versions 4.0, 4.1, 5.0, 5.1, 5.5 and 6.0

VM Series – SR-IOV The following NIC chipset cards are supported:

Intel 82599 ,Intel X540,Intel X710/XL710

Language support

The following table lists language support information.

SSL VPN support

Language support

Language GUI
Chinese (Simplified)
Chinese (Traditional)
Portuguese (Brazil)
Spanish (Spain)

SSL VPN support

SSL VPN standalone client

The following table lists SSL VPN tunnel client standalone installer for the following operating systems.

Operating system and installers

Operating System Installer
Microsoft Windows XP SP3 (32-bit)

Microsoft Windows 7 (32-bit & 64-bit)

Microsoft Windows 8 (32-bit & 64-bit)

Microsoft Windows 8.1 (32-bit & 64-bit)

Microsoft Windows 10 (32-bit & 64-bit) 2329
Linux CentOS 6.5 (32-bit & 64-bit) Linux Ubuntu 12.0.4 (32-bit & 64-bit) 2329
Virtual Desktop for Microsoft Windows 7 SP1 (32-bit) 2329

Other operating systems may function correctly, but are not supported by Fortinet.

Product Integration and Support                                                                                                  SSL VPN support

SSL VPN web mode

The following table lists the operating systems and web browsers supported by SSL VPN web mode.

Supported operating systems and web browsers

Operating System Web Browser
Microsoft Windows 7 SP1 (32-bit/64-bit) Microsoft Internet Explorer version 11 Mozilla Firefox version 46
Microsoft Windows 8/8.1 (32-bit/64-bit) Microsoft Internet Explorer version 11 Mozilla Firefox version 46
Mac OS 10.9 Safari 7
Linux CentOS version 6.5 Mozilla Firefox version 46

Other operating systems and web browsers may function correctly, but are not supported by Fortinet.

SSL VPN host compatibility list

The following table lists the antivirus and firewall client software packages that are supported.

Supported Microsoft Windows XP antivirus and firewall software

Product Antivirus Firewall
Symantec Endpoint Protection 11
Kaspersky Antivirus 2009  
McAfee Security Center 8.1
Trend Micro Internet Security Pro
F-Secure Internet Security 2009

Supported Microsoft Windows 7 32-bit antivirus and firewall software

Product Antivirus Firewall
CA Internet Security Suite Plus Software
AVG Internet Security 2011    
F-Secure Internet Security 2011

SSL VPN support

Product Antivirus Firewall
Kaspersky Internet Security 2011
McAfee Internet Security 2011
Norton 360™ Version 4.0
Norton™ Internet Security 2011
Panda Internet Security 2011
Sophos Security Suite
Trend Micro Titanium Internet Security
ZoneAlarm Security Suite
Symantec Endpoint Protection Small Business Edition 12.0


Resolved Issues

The following issues have been fixed in version 5.4.2. For inquires about a particular bug, please contact CustomerService & Support.


Bug ID Description
372629 Hardware issue of FG-60D cause config lost


Bug ID Description
373153 FG-80D should support jumbo frame on new kernel
376656 FG-80D change port speed does not take effect


Bug ID Description
371098 VLAN counters match physical port if NP6 offloading is disabled


Bug ID Description
365101 Fail IQC traffic test, all blocking at port8 for ip connection


Bug ID Description
386683 Kernel panics after roughly 24 hours uptime
388646 FG-1500D: hardware test CPU/Memory test fail
370151 CPU doesn’t remove dirty flag when returns session back to NP6
295041 Destination MAC address on NP6 offloaded IPv6 sessions are not updated when neighbor MAC changes


Bug ID Description
385669 FG-3000D crash with kernel panic


Bug ID Description
375749 Sometimes NP6 gets np6_fos_ipsec_sa_install 746 npu_tunnel_idx doesn’t match error message


Bug ID Description
379098 FortiLink Switch-Controller: Support “edge-port” setting for managed switch ports
380919 EAP tunnel is terminated at Authenticator(FGT) instead of at Auth-Server
387398 no admin password on Fortilink managed switch


Bug ID Description
375394 Httpsd crashes when accessing page of Fortiview>VPN in GUI
390105 Fortiview VPN page shows minus value in field “Bytes(sent/received)” for L2TP and PPTP tunnels


Bug ID Description
382343 GTPV2 – Create Session response message denied due to ‘ie-is-missing’


Bug ID Description
371106 Removed trusted host is not re-indexed but replaced with
371904 GUI does not prevent upgrading invalid CC signature image in FIPS mode.
Bug ID Description
375255 Cannot quarantine FortiClient device on FortiView because of javascript error from trunk 5x.
288896 Should fall back to non-paging search if Oracle ODSEE 11.1 LDAP returns LDAP_ UNAVAILABLE_CRITICAL_EXTENSION.
390088 Contract registration should accept characters.
390794 Fix fail to create IPsec IKEv2 custom VPN tunnel with authmethod psk in GUI.
374221 SSLVPN setting portal mapping realm field misses the “/” option.
374339 SSLVPN setting page may not check the required fields.
386862 Large lists of address objects can take a considerable amount of time to load
292615 VLAN interface based on NPU vdom link can’t be displayed in vdom-network-interface page
370360 VDOM read-only admin can view super admin and other higher priviledge admin’s password hash via REST API and direct URL
373031 Unable to view FortiToken CD (FTK211) on FortiGate WebU
378817 Traffic Shapers list priority should display text word not number
391703 Add video links to FortiOS GUI
377539 Filter Overrides is removed after clicking on Apply on the Application Control profile

FortiSwitch Controller

Bug ID Description
388436 Traffic is intermittently blocked when HA FortiGate controls FSW by split interface.
387555 VLAN switch trunk function stops working


Bug ID Description
369540 Kills the parent process (fgfmsd) and causes script exec reboot from FMG does not work on FortiGate.
372629 Hardware issue of FG-60D causes config to be lost.
375188 After factoryreset2, split port interfaces are lost.


Bug ID Description
375141 When NP6 offload is enabled, traffic will show up in wrong VDOM but correct VLAN interface.
380157 ZebOS issues on new VDOM.
385362 Remove username and password requirement for CLI exec central-mgmt register-device FMGSN KEY username password.
367471 Fragmented out-of-sequence ICMP Reply can loop endlessly in npu-vlink.
385455 Inconsistent trustedhost behavior.
381857 LACP passive mode voluntarily initiate LACP negotiation then aggregate interfaces unexpected establishing.
374481 Alertmail does not work on CHANGED management VDOM.
384698 Cache memory increased abruptly.
390570 FEXT discovery issue fixed.
390592 Update geoip database to version 1.057.
387675 ARP-Reply packets drops in NP6.


ICMP packets with HBH options are now forwarded properly.
389194 End of Daylight Savings (DST) timezone Turkey/Istanbul GMT +3.
371387 Add two trailers for FK images, to make it pass the upgrade test.
381675 Support SNMP query for individual CPU Core monitoring in kernel-3.2.
390207 Fix ixgbevf driver VLAN issue.
292237 FG-200D hangs with transmit timeouts.
378761 Allow local-in traffic When system memory reaches 94%.


LACP over Virtual Wire Pair on 800C, ports not forwarding LACPDUs.
372632 Eliminate kernel crash and reboots while FortiManager pushes config changes.
356245 Fix LACP ignoring peer ID change.
380161 No reply to SNMP queries if reply should be routed via PBR.
Bug ID Description
374715 Add TCP seqnum verification to BGP on RST packets.
302021 Enable FortiTest feature for 400D/600D platforms.


Enable diagnose hardware test on FG-100D/800D and fix related bugs.
389047 Unable to edit/create system interface when a large number of detected devices exist has been fixed.
370778 Connection problem to new master FQDN address of FMG after failover.
386478 Add LFG60C B0735 (LENC) device failed with internal error.
375338 FortiManager with super_admin profile install capture-packet meet privilege issue.
373344 “diag ip address list” still show ip address although dhcp lease time expired
376144 FMG failed to change FGT HA slave to master
380600 CLI configurable NP6 optimization
388603 after reassembly fragmented UDP packet, the s/d port become 0
365441 FGT is showing capwap IP ( and mac-address (01:00:5e:00:01:8c) even no capwap enable on the port
369353 Destination MAC address will not be updated for NPU offloaded IPv4 sessions sometimes.


Bug ID Description
382232 FG-900D explicit proxy max users < FG-800D.
390053 Increase firewall.schedule limits on higher end


Bug ID Description
369864 BFD is DOWN randomly.


Default static router setting should use port1.
Bug ID Description
382934 gpd may crash after executing get router info bgp route-map.
381908 Asymmetric routing in transparent VDOM has to be enabled for correct packet flow after upgrade from 5.2.
373820 Update route_cache only when there are changes in route table.


Added support for BGP Local-AS feature.
391240 BGP UPDATES without NEXT_HOP
376765 E models cannot establish BGP session with Non-ARM platforms when MD5 password authentication enabled
391233 Multicast router doesn’t send the PIM register after upgrading from 5.2.7 to 5.4.1


Bug ID Description
387163 Fix WiFi driver crash for 3.2 kernel FWF platforms.
371374 Add back support of wave2 FAP421E/423E.
376921 FortiGate kills cw_acd daemon continuously in 900+ APs large setup.


WPA-Personal passphrase should support a fixed-length of 64 hexadecimal digits.
387163 Fix WiFi driver crash for 3.2 kernel FWF platforms.
309597 Fix WiFi region codes and DFS support.
374617 Memory leak happens when change large WTP sessions’s security option.
370657 FDS daemon should return error code when fortiap version is not available in FAPV
374385 Fortinet_WiFi is not signed by PositiveSSL_CA/Fortinet_WiFi_CA after LENC license is loaded
387163 FWF30E / kernel error happpened when purge vap interface by CLI


Bug ID Description
373804 Encounter several scanunit daemon crash on US WiFi corp firewall.
384520 3600C crash on scanunit signal 11 (Segmentation fault)


Bug ID Description
369825 Do not compare DLP filesize filter for files inside an archive.


Bug ID Description
371254 ipsengine signal 11 crash happens on FG-60D/90D when IPS custom signature is detected.
378192 Per-IP shaper is not working for Application Category.
381547 Fix SynProxy offloading issue.
369137 IPSec performance decreased after upgraded FG-100D from V5.2.5 to V5.4.0 in certain test.
302853 Unnecessary debug message print out when change certain ips config.
379275 Fix FortiOS memory corruption caused by ips engine crash.
378252 Flow UTM: Save last session info into crash log when IPS engine crash happens.
379833 Adjust IPS CPU assignment to improve 3815D performance.
383525 Fix for IPsec mesh selectors not automatically brought up when phase2 auto-negotiate enabled.
379082 Proxyworker high CPU waiting for IPS to reinitialize.
389610 IPS app id/cat id should be datasrc and the cat id list source is inaccurate.
368729 State preservation test failed at max mem – attack packet not blocked
386050 WAD daemon consumes 99.8% CPU utilization
300785 Enabling sync-session-ttl will cause the existing IPS sessions to be removed
Bug ID Description
379084 Botnet DB update shouldn’t cause IPS/AppCtrl signature reload in CMDB
386271 After enabling IPS sensor with custom sig, in 60% chance need to wait for 30+ seconds to let ping packet pass
392520 Update IPS engine to build 3.294

Web Filter

Bug ID Description
378234 WAD crash in wad_fmem_free after upgrade to 5.4.1.
388731 Fix rpc-over-http will cause WAD crash when enable UUID is not found in RTS.
382501 Kerberos authentication fails with unexpected token length error.
376486 WAD not supporting full webfilter with transparent policy and external webproxy in SSL deepscan mode.
373251 Local FortiGuard overrided rating sometimes doesn’t work well.
380119 Webfilter Static URL filter blocking domains with similar name.
377206 Fix wanopt log incorrect and wad ntlm auth crash.
390446 Fix webfilter urlfilter mismatch.


Fix proxyd and wad ssl related issues.
388957 Fix YouTube EDU filter: None, Moderate, Strict.
393381 Suggest add webfilter profile fgd block and override config CLI correlation check

DNS Filter

Bug ID Description
390957 Make DNS filter available under flow-inspection mode has been fixed.
Bug ID Description
386167 Proxy vdom SSLVPN IPv6 av doesn’t block virus if IPv4 policy UTM disable.


Bug ID Description
381112 Website drop-down menu does not work when accessed via SSLVPN bookmark.
371933 Unable to connect to SMB server which supports only NTLMv2.
371597 SSLVPN fail to login FGT 5.4 bookmark through Fortinet bar with url-obscuration enable.
371551 Fix SSLVPN user authenticates doesn’t follow firewall policy order when change user group order until reboot.
371807 Try next server when LDAP group auth failed on first firewall policy.
377207 fix could not access owncloud properly through SSLVPN.
377557 Change tunnel set-up timeout threshold for SSLVPN web portal with limit-userlogins.
382586 Fixed path not found is printed out when certificate is changed.
384200 Fix SSLVPN tunnel sometimes gets disconnected without error message.
374859 Fix got fork() failed after SSLVPN enter conserve mode.
379450 Fix SSLVPN crash with segmentation fault in sslvpn_ap_table_get after upgrading to 5.4.1.
379076 RDP session will be disconnected after the idle-timeout is expired on web-portal.
378103 Fix SSLVPN/newcli crash when running get vpn ssl monitor if there are more than 10000 tunnels.


Fixed SSLVPN has high CPU/crashed.
375561 RESOURCE_LEAK found in SSLVPN.
386968 Getting error Failed, suspended by other users when edit some content using Firefox.
379076 RDP session will be disconnected after the idle-timeout is expired on web-portal.
382828 SSLVPN web-mode not displaying login page of internal server, but tunnel-mode is OK.
355913 SSLVPN setting -> edit authentication/portal mapping page issue
387966 Username replaced by peer name in certificate based SSLVPN
Bug ID Description
375379 Username and password are displayed in clear text in the browser bar for CIFS/SMB SSL VPN Bookmark


Bug ID Description
376779 The algorithm names sha384 and sha512 are not displayed in the output of get commands for ipsec tunnel.
375749, 382568 Fix TPE_SHAPER drop on NP6 and an IPsec issue on FG-3810D.
383935 Policy-based routes does not work for Dialup IPSec routes in Fortios5.4.1.
376340 Change vpn ipsec phase1/phase1-interface peertype default from ‘any’ to ‘peer’
388408 Incorrect output for “get vpn ipsec stats crypto”

Web Application Firewall

Bug ID Description
378194 Suspect WAF breaks JSON file by adding zero to the end.
383520 WAF url-access not work.


Bug ID Description
365586 Need to restart fnbamd to load import CRL.
373930 Unset ssh-certificate can not allow client to access with null password.


Bug ID Description
384581 Explicit Proxy Signing Certificate for replacement pages resets to default.
374706 Fix a memory leak on proxyd.
380324 Transparent Proxy SSL Inspection closes connections before completion of SSL negotiation and/or complains of Bad Record.
Bug ID Description
389059 Improve SOCKS debug and WAF&AV scan on HTTP request.
381429 CP8 does not work for Proxy SSL acceleration.
378518 Fix WAD will crash when using web-proxy profile to add/remove HTTP headers.


Fix WAD SSL session ticket will cause crash on hello request, and add cert status extension support to fts.
371991 YouTube_Video.Play is not recognized with HTTPS in Application control Override.


Bug ID Description
365259 src-vis crash on device with device detection eanbled on one-arm-sniffer interface
Bug ID Description
386446 tunnelip shouldn’t be shown if no tunnel IP in the log.


Bug ID Description
372030 Increase VM00 memory limit to 1.5G.
376567 Fix network reachability issue of AWS instance launched from customer created ami.
372040 VLAN not forward traffic out on non-root VDOM.
374905 Error when attempting to deploy vApp on ESXi v6.0.0.
372487 Fix FG-VM stuck at rebooting the system when its rebooting.
378482 TCP/UDP traffic failing when NAT/UTM is enabled on FG-VM in KVM.


Improve cloudinit boot up config sequence.
371982 Fix FG-VM have no gui-wanopt.
392654 IPv6 basic network settings not available on unlicense VM01 or higher


Bug ID Description
376157 Logging performance improvement for IPS/AppCtrl.
284055 Improve the antispam log fortiguardresp log field.
377928 FortiCloud report can’t be displayed on low-end platforms without SSD after burn image
373083 Broken remote log capabilities when resolve-ip is enabled


Bug ID Description


Fix Traffic was broken over A-P mode WANOPT on first attempt after WAD restarted.
393114 WAD crash in wad_str_copy_str after upgrade to 5.4.1


Bug ID Description
387212 HA gets out of sync frequently and hasync becomes zombie.
385999 Log backup of execute backup disk xxx feature does not work fine on HA master unit.
374418 No safe method for modifying secondary vcluster membership via the CLI.
266261 FortiExtender interface unable to get DHCP IP on a FortiGate in HA mode.
301101 hasync process is running 100% of CPU.
389192 Can’t forward the SIP traffics(200OK messages) asymmetrical traffic environment in FGSP.
368447 FGSP should not sync static BFD setting.
375678 update-all-session-timer partially broken.
376449 FGSP: FGT1 clears SCTP Multihomed session marked established while data traffic is going through secondary path.
378213 FGSP: after a reboot of the FortiGate that holds the SCTP secondary path, this session is missing and will be reopened.
390929 hatalk crashed when set standaone-config-sync from enable to disable.
Bug ID Description
376045 Software switch can’t authorize FSWS successfully in HA scenario.
390926 After downgrade from b1086, HA can’t be synced.
382364 Correct typo error in HA setting (change helo-holddown to hello-holddown).


Bug ID Description
386021 FSSO local poller fails on some X86 32 platform.


Bug ID Description
376284 Fix CLI firewall.addrgrp when contain url upgrade from 5.2 to 5.4.
387367 Firewall is rebooting automatically.
373667 High vsd memory usage always triggers entering conserve mode when downloading file in SSL offload + IPS inspection.
368838 active-flow-timeout does not take effect for HTTP protocol when NP6 offloaded.
385983 ssl-http-location-conversion setting change from enable to disable by rebooting FortiGate.
375897 Sniffer policy upgrade from b0718 to b1064 failed.
383783 policy64 and policy46 ID should not use special id:4294967295.
297421 Fix policy re-push for multiple VDOMs.


On some platforms, UDP throughput is lower with more number of policies.


Bug ID Description
380703 Generation of IKE v2 nonces – NDcPP requirement.
375098 Remove CC error mode.
375102 Modify low level format for boot device (flash) in FIPS-CC mode.
Bug ID Description
375099 Update supported TLS cipher suites in FIPS-CC mode.
376860 IPSec ESP SA with stronger encryption than IKE SA shouldn’t be allowed.
387002 Add HMAC SHA-384/512 self-tests.
375100 Update supported SSH cipher suites in FIPS-CC mode.
387542 Remove CRL/Ceritifcate/CA may cause FIPS-CC self-test failure.
389003 FIPS-CC get self-test failure causes of /etc/cert/ca/ changes, which causes system halt.
388181 Add support to break RNG health tests


Bug ID Description
380506 FortiGate’s forticldd daemon timer settings and updated timer discussion.
Bug ID Description
393056 Explicit proxy config lost on interfaces after upgrading if vdom is enabled


Bug ID Description
370201 Fix the imd crash issue when unregistering SIP with asterisk (*) contact, or multiple REGISTER message with same AOR and multiple contacts.
382315 Fix the issue that SIP re-invites causing excessive memory consumption in VOIPD.

Common Vulnerabilities and Exposures

Bug ID Description
379870 FortiOS 5.4.2 is no longer vulnerable to the following CVE References: l 2003-1418 l 2007-6750

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Bug ID Description
373707 FortiOS 5.4.2 is no longer vulnerable to the following CVE References: l 2016-1551 l 2016-1549 l 2016-2516 l 2016-2517 l 2016-2518 l 2016-2519 l 2016-1547 l 2016-1548 l 2015-7704 l 2015-8138 l 2016-1550

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383538 FortiOS 5.4.2 is no longer vulnerable to the following CVE References: l 2016-3713 l 2016-5829

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381168 FortiOS 5.4.2 is no longer vulnerable to the following CVE Reference: l 2004-0230

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378697 FortiOS 5.4.2 is no longer vulnerable to the following CVE Reference: l 2016-2512

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383564 FortiOS 5.4.2 is no longer vulnerable to the following CVE Reference: l 2016-5696

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Bug ID Description
372770 FortiOS 5.4.2 is no longer vulnerable to the following CVE References: l 2016-6304 l 2016-6305 l 2016-2183 l 2016-6303 l 2016-6302 l 2016-2182 l 2016-2180 l 2016-2177 l 2015-2178 l 2015-2179 l 2016-2181 l 2016-6306 l 2016-6307 l 2016-6308

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389610 FortiOS 5.4.2 is no longer vulnerable to the following CVE References: l 2016-6309 l 2016-7052

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Known Issues

The following issues have been identified in version 5.4.2. 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
392049 Cannot create the second IPv6 VIP which has the same ext/int IP as the existing one, but different port-forwarding port.
364589 LB VIP slow access when cookie persistence is enabled.


Bug ID Description
393649 Executable files may not be blocked by DLP built-in exe file-type filter.
379911 DLP filter order is not applied on encrypted files.

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.
391537 Buffer size is too small when sending a large vulnerability list to FortiGate.


Bug ID Description
375149 NDcPP requires a SSH server rekey.



Bug ID Description
385860 FG-3815D does not support 1GE SFP transceivers.


Bug ID Description
375246 invalid hbdev dmz may be received if the default hbdev is used.
357360 DHCP snooping does not work on IPv6.
374346 Adding or reducing stacking connections may block traffic for 20 seconds.


Bug ID Description
393966 Trunk port does not work if the only VLAN member is on PoE interfaces.


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.
Bug ID Description
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.


Bug ID Description
289297 Threat map may not be fully displayed when screen resolution is not big enough.
303928 After upgrading from 5.2 to 5.4, the default flow based AV profile may not be visible or selectable in the Firewall policy page in the GUI.
374166 Using Edge cannot select the firewall address when configuring a static route.
365223 CSF: downstream FGT may be shown twice when it uses hardware switch to connect upstream.
373546 Only 50 security logs may be displayed in the Log Details pane when more than 50 are triggered.
375383 Policy list page may receive a js error when clicking the search box if the policy includes wan-load-balance interface.
375369 May not be able to change IPsec manualkey config in GUI.
374363 Selecting Connect to CLI from managed FAP context menu may not connect to FortiAP.
374521 Unable to Revert revisions on GUI.
374081 wan-load-balance interface may be shown in the address associated interface list.
355388 The Select window for remote server in remote user group may not work as expected.
373363 Multicast policy interface may list the wan-load-balance interface.
372943 Explicit proxy policy may show a blank for default authentication method.
375346 You may not be able to download the application control packet capture from the forward traffic log.


Bug ID Description
375290 Fortinet Bar may not be displayed properly.
374224 The Ominiselect widget and Tooltip keep loading when clicking a newly created object in the Firewall Policy page.
374322 Interfaces page may display the wrong MAC Address for the hardware switch.
374247 GUI list may list another VDOM interface when editing a redundant interface.
374320 Editing a user from the Policy list page may re-direct to an empty user edit page.
375036 The Archived Data in the Sniffer Traffic log may not display detailed content and download.
374397 Should only list any as destination interface when creating an explicit proxy in the TP VDOM.
374221 SS LVPN setting portal mapping realm field misses the / option.
372908 The interface tooltip keeps loading the VLAN interface when its physical interface is in another VDOM.
374162 GUI may show the modem status as Active in the Monitor page after setting the modem to disable.
375227 You may be able to open the dropdown box and add new profiles even though it errors occur when editing a Firewall Policy page.
375259 Addrgrp editing page receives a js error if addrgrp contains another group object.
374343 After enable inspect-all in ssl-ssh-profile, user may not be able to modify allow-invalid-server-cert from GUI
372825 If the selected SSID has reached the maximum entry, the GUI will reset the previously selected SSID.
374191 The Interface may be hidden from the Physical list if its VLAN interface is a ZONE member in the GUI.
374525 When activating the FortiCloud/Register-FortiGate clicking OK may not work the first time.
374350 Field pre-shared key may be unavailable when editing the IPsec dialup tunnel created through the VPN wizard
374371 The IPS Predefined Signature information popup window may not be displayed because it is hidden behind the Add Signature window.
Bug ID Description
374183 Security page does not have details for the Forward Traffic log for an IPS attack when displaying a FortiAnalyzer log.
374538 Unable to enable Upload logs to FortiAnalyzer after disabling it.
374373 Policy View: Filter bar may display the IPv4 policy name for the IPv6 policy.
365378 You may not be able to assign ha-mgmt-interface IP address in the same subnet as another port from the GUI.
374237 You may not be able to set a custom NTP server in the GUI if you did not config it in the CLI first.
393927 Policy List > FQDN Object Tooltip should show resolved IP addresses.
393267 Not possible to edit existing Web Filter profile.
297832 Administrator with read-write permission for Firewall Configuration is not able to read or write firewall policies.
283682 Cannot delete FSSO-polling AD group from LDAP list tree window in FSSO-user GUI.
365317 Unable to add new AD group in second FSSO local polling agent.


Bug ID Description
387216 HA virtual MAC is flapping.
391084 HA unable to sync inversed object entries.
388044 Four member HA Cluster do not always re-converge properly when HB links are re-established.


Bug ID Description
393675 SSH due to Application Control Proxy in the Security Profile.
393958 Shellshock attack succeeds when FGT is configured with server-cert-mode replace and an attacker uses rsa_3des_sha.
394157 IPS archive not uploaded to FAZ when it is in realtime mode.


Bug ID Description
375020 IPsec tunnel Fortinet bar may not be displayed properly.
374326 Accept type: Any peer ID may be unavailable when creating a IPsec dialup tunnel with a pre-shared key and ikev1 in main mode.

Logging & Report

Bug ID Description
300637 MUDB logs may display Unknown in the Attack Name field under UTM logs.
374103 Botnet detection events are not listed in the Learning Report.
367247 FortiSwitch log may not show the details in the GUI, while in CLI the details are displayed.
374411 Local and Learning report web usage may only report data for outgoing traffic.
391786 Logdiskless FGT does not generate a log indicating a sandboxing result.
377733 Results/Deny All filter does not return all required/expected data.


Bug ID Description
393127 WLB measured-volume-based load balance does not work as expected after running for more than one day.
393623 Policy routing change not is not reflected.
385264 AS-override has not been applied in multihop AS path condition.


Bug ID Description
304528 SSL VPN Web Mode PKI user might immediately log back in even after logging out.
303661 The Start Tunnel feature may have been removed.
375137 SSL VPN bookmarks may be accessible after accessing more than ten bookmarks in web mode.
374644 SSL VPN tunnel mode Fortinetbar may not be displayed.
Bug ID Description
393698 SSL VPN web mode http/https SSO will keep trying even if the password is wrong.
307465 Fail to Copy & Paste through RDP when connected by SSL VPN web mode.
393943 SSL VPN crash when connect to win2008 smb/CIFS bookmark with wrong password.


Bug ID Description
304199 FortiLink traffic is lost in HA mode.
295292 If private-data-encryption is enabled, when restoring config to a FortiGate, the FortiGate may not prompt the user to enter the key.
290708 nturbo may not support CAPWAP traffic.
372717 Unable to access FortiGate GUI via https using low ciphers.
364280 User can not use ssh-dss algorithm to login to FortiGate via SSH.
371320 show system interface may not show the Port list in sequential order.
372717 admin-https-banned-cipher in sys global may not work as expected.
371986 NP6 may have issue handling fragment packets.
287612 Span function of software switch may not work on FortiGate-51E/FortiGate-30E.
355256 After reassigning a hardware switch to a TP-mode VDOM, bridge table does not learn MAC addresses until after a reboot.
388046 Confsyncd memory leak.
393395 The role of new VAP interface should be set as LAN.
393042 IPv6 traffic not distributed according to the lacp L4 algorithm.
393343 Remove botnet filter option if interface role is set to LAN.
392960 FOS support for V4 BIOS.
392125 FGT to FMG backup config returned with the Management server is not configured error message.
392125 After an HA failover some of the multicast streams stop.


Bug ID Description
269799 sniffer config may be lost after upgrade.


Bug ID Description
374138 FortiGate device with VIP configured may be put under Router/NAT devices because of an address change.


Bug ID Description
364280 ssh-dss may not work on FGT-VM-LENC.
378421 Committing any change on SSL VPN Settings over web page returns error:500.



Citrix XenServer limitations

The following limitations apply to Citrix XenServer installations:

  • XenTools installation is not supported.
  • FortiGate-VM can be imported or deployed in only the following three formats:
  • XVA (recommended) l VHD l OVF
  • The XVA format comes pre-configured with default configurations for VM name, virtual CPU, memory, and virtual NIC. Other formats will require manual configuration before the first power on process.

Open Source XenServer limitations

When using Linux Ubuntu version 11.10, XenServer version 4.1.0, and libvir version 0.9.2, importing issues may arise when using the QCOW2 format and existing HDA issues.

This entry was posted in Fortinet, FortiOS, Release Notes and tagged , , on by .

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).

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