There are issues with some drivers for Windows 10 and Windows 11 when using IPsec VPN. The IPsec tunnel cannot be established. On both operating systems the issue is related to the driver of the network card. The problematic driver was deployed via Windows Update. In many cases the network card used was the Lenovo USB Ethernet adapter. Many customers reported, that the IPSec tunnel is working over wifi while it is not working over wired ethernet.
Windows 11
As example, in Windows 11 the FortiClient is preventing the IPSec connection and showing the following error message instead:
An update to the latest driver did not help. To be able to solve the issue, an older network card driver had to be used.
Source:
https://community.fortinet.com/t5/Support-Forum/Can-t-connect-to-IPsec-VPN-in-Windows-11/m-p/202225
Not working Realtek driver= 1153.9.20.823
Working Realtek driver= 1153.8.20.0608
Update: FortiClient 7.2.4 support for newer Realtek drivers in Windows 11
Issues regarding FortiClient support for newer Realtek drivers in Windows 11 have been resolved. The issue is that
Realtek and Qualcomm used the NetAdapterCx structure in their drivers, and Microsoft’s API had an error in translating
the flags, which may result in IPsec VPN connection failure
Windows 10
Not working Realtek driver= 1153.13.420.2023
Working Realtek driver= 10.59.420.2023
Hi
Thats correct for the Realtek USB Device it is working.
We could also fix it by using The Microsoft Driver 10.38.117.2020.
But we still have no fix for the Realtek PCI-E Device?
Do you have more infos about that device? See in the forum post which you have linked above.
Hello Michael
Thanks for your feedback.
Unfortunately we are not aware of a fix for the Realtek PCI-E Device as for now. We will update this post as soon as we have news for that matter.
The Boll Tech Team
Hi
FortiClient 7.2.3 was announced with a fix for this Problem.
I was able to fix that now also with the PCI-E Device but only with the 10.68 driver