Good afternoon everyone!
Came across an issue today and I think I found the problem, and a work around solution.
A few people I have seen have this issue, so I wanted to post my results in case anyone else needs them.
Original Issue: Forticlient (ipsec) VPN not connecting on Windows 11
After some troubleshooting, I found that the VPN would work only over Wifi and not via Ethernet.
I then tested a USB to Ethernet adapter, and it was able to work.
So I narrowed the issue down to the onboard Ethernet driver.
Driver was up to date, so I did the typical uninstall/reinstall, Did not work.
However I knew my Windows 10 machines worked flawlessly.
Solution: I was on Realtek driver version 1168, So I decided to try downgrading the Wifi driver to 10.54.
That fixed the issue.
It seems the problem is related to the newest Realtek Ethernet drivers, at least it was for me.
I don't know if other brands have the issue too.
I wanted to get this information out there for anyone who needs it, and so Fortinet can be made aware of the issue to look into Driver compatibility problems.
If you have this issue, and this resolves it for you, please let me know, I am curious to see if this fixes for everyone with the issue.