Frequent Unexpected VPN Disconnects on macOS (FortiClient)

[alisherolimov]

I’m having an ongoing issue with FortiClient VPN on my Mac that only affects my device, even though my configuration matches my colleagues who use the same Wi-Fi network.
Here is the issue:

• I can connect to Fortinet VPN successfully.
• After some time (even while I’m actively working and the laptop is fully awake), the VPN disconnects automatically.
• The Mac does not go to sleep, and the Wi-Fi connection stays up.
• My colleagues using the same network and same VPN configuration do not experience any disconnects.

I checked macOS power settings, disabled sleep, and verified network keepalive options — the issue still happens.
 Even after reinstalling macOS and fortinet to latest version, the problem persists.(FortiClient VPN-only free version)

I extracted the FortiClient logs and noticed a repeating pattern:

WM_USER_PIPEMSG_VPN_DISCONNECTED
 failed to load currentvpn
 ssl_state=0
 defaultTunnel=null

[Stephen_G]

Hello alisherolimov, 

Thank you for using the Community Forum. I will seek to get you an answer or help. We will reply to this thread with an update as soon as possible. 

[funkylicious]

what macOS version are you running?

[alisherolimov]

Hi i have Mac m1 pro tahoe latest version i had his issue in Sequoia as well 

[funkylicious]

have you followed the https://docs.fortinet.com/document/forticlient/7.4.3/macos-release-notes/223986 ?

[alisherolimov]

Unfortunately, it didn’t help.

[funkylicious]

what FCT version are you running ?

L.E. i just saw that the latest, i presume 7.4.3. try a downgrade to a previous version like 7.4.1 or 7.2.1X

[alisherolimov]

i installed the latest one 7.4.3.1761.Where can i download the old versions? 

[funkylicious]

usually support.fortinet.com would have all the versions/archives of the client but besides the account ( which can be created for free ) i think it will require a product that is registered and has a valid contract in order to allow download.

https://community.fortinet.com/t5/FortiGate/Technical-Tip-How-to-download-different-or-old-versions-...