I wasn't able to connect to an IPsec VPN through FortiClient VPN (7.0.2.0090 free) when updated to Windows 11 (build 22000), SSL VPNs were working fine. When I downgraded to Windows 10 (21h2 build 19044.1415) the IPsec VPN started working again.
This is the error that I got on FortiClient
And this is the log that I exported
12/28/2021 4:02:55 PM info sslvpn date=2021-12-28 time=16:02:54 logver=1 id=96602 type=securityevent subtype=sslvpn eventtype=status level=info uid=19AEBE88942A48F59578C42AA765D590 devid=FCT8003159070034 hostname=DESKTOP-5BJFTJ3 pcdomain=N/A deviceip=192.168.224.1 devicemac=<redacted> site=N/A fctver=7.0.2.0090 fgtserial=FCT8003159070034 emsserial=N/A os="Microsoft Windows 11 , 64-bit (build 22000)" user=bueno msg="SSLVPN service started successfully" vpnstate=
12/28/2021 4:03:04 PM info system date=2021-12-28 time=16:03:03 logver=1 id=96823 type=systemevent subtype=system eventtype=status level=info uid=19AEBE88942A48F59578C42AA765D590 devid=FCT8003159070034 hostname=DESKTOP-5BJFTJ3 pcdomain=N/A deviceip=192.168.224.1 devicemac=<redacted> site=N/A fctver=7.0.2.0090 fgtserial=FCT8003159070034 emsserial=N/A os="Microsoft Windows 11 , 64-bit (build 22000)" user=bueno msg="Checking for updates"
12/28/2021 4:04:26 PM info ipsecvpn date=2021-12-28 time=16:04:25 logver=1 id=96566 type=securityevent subtype=ipsecvpn eventtype=status level=info uid=19AEBE88942A48F59578C42AA765D590 devid=FCT8003159070034 hostname=DESKTOP-5BJFTJ3 pcdomain=N/A deviceip=192.168.224.1 devicemac=<redacted> site=N/A fctver=7.0.2.0090 fgtserial=FCT8003159070034 emsserial=N/A os="Microsoft Windows 11 , 64-bit (build 22000)" user=bueno msg="loc_ip=192.168.100.2 loc_port=500 rem_ip=<vpn-external-ip> rem_port=500 out_if=0 vpn_tunnel=RS IPsec action=negotiate init=local mode=aggressive stage=1 dir=outbound status=success Initiator: sent <vpn-external-ip> aggressive mode message #1 (OK)" vpntunnel="RS IPsec"
12/28/2021 4:04:38 PM warning ipsecvpn date=2021-12-28 time=16:04:37 logver=1 id=96561 type=securityevent subtype=ipsecvpn eventtype=error level=warning uid=19AEBE88942A48F59578C42AA765D590 devid=FCT8003159070034 hostname=DESKTOP-5BJFTJ3 pcdomain=N/A deviceip=192.168.224.1 devicemac=<redacted> site=N/A fctver=7.0.2.0090 fgtserial=FCT8003159070034 emsserial=N/A os="Microsoft Windows 11 , 64-bit (build 22000)" user=bueno msg="No response from the peer, phase1 retransmit reaches maximum count" vpntunnel="RS IPsec" locip=192.168.100.2 locport=500 remip=<vpn-external-ip> remport=500
This is a log exported after a successful connection (in W10)
12/30/2021 8:24:23 AM info ipsecvpn date=2021-12-30 time=08:24:22 logver=1 id=96566 type=securityevent subtype=ipsecvpn eventtype=status level=info uid=19AEBE88942A48F59578C42AA765D590 devid=FCT8003159070034 hostname=DESKTOP-5BJFTJ3 pcdomain=N/A deviceip=<my-external-ip> devicemac=<redacted> site=N/A fctver=7.0.2.0090 fgtserial=FCT8003159070034 emsserial=N/A os="Microsoft Windows 10 , 64-bit (build 19041)" user=bueno msg="loc_ip=192.168.100.2 loc_port=4500 rem_ip=<vpn-external-ip> rem_port=4500 out_if=0 vpn_tunnel=CIEE-RS action=negotiate init=local mode=quick stage=2 dir=outbound status=success Initiator: sent <vpn-external-ip> quick mode message #2 (DONE)" vpntunnel=CIEE-RS
In this log the loc_port and rem_port are different (4500, in the other log it's 500), also the deviceip is my external IP, not a local IP (that doesn't look like an IP that my machine would be using).
I don't know if that's causing the problem, but it's all I can find.
Does anyone have any tips?
Solved! Go to Solution.
Created on 02-15-2022 11:08 AM Edited on 02-15-2022 11:21 AM
I figured out the issue. It is a Windows 11 Ethernet driver issue.
Wifi connects to VPN, Ethernet via USB to Eth adapter works.
I downgraded to Win10 Realtek 10.54 driver version.
That fixed the issue for me.
Realtek PCIe FE / GBE / 2.5G / Gaming Ethernet Family Controller Software - REALTEK
let me know if this works for anyone else.
Hi
We could solve that problem with the Realtek USB GbE Family Controller by Downgrading to the Win10 driver 10.54.
But now I have the same problem with Realtek PCIe GbE Family Controller.
I tried the 10.54 driver, but it did not solve the problem.
I also tried FortiClient 7.0.2, 7.0.7 and 7.0.9 -> always the same problem.
Over WiFi it works perfectly.
Any other idea how to solve it?
Yea, this is getting really annoying. Especially when you are getting new computers with new hardware that only has windows 10/11 combo drivers available. I swear it is some form of change or update to the IPsec stack that Fortinet isn't taking in to account that doesn't exist in the older drivers. Especially since I am having this issue across multiple vendors. Realtek/Intel/Qualcomm
Yeah, and I'm using Killer wifi network adapter. And just like you, others in my workplace are using other vendors like Realtek/intel/qualcomm...
I don't mind using SSL, but I can't get split tunneling to work with that setup and the Fortinet team couldn't get it to work for me either.
I thought the driver was our problem but it ended up being Cisco Umbrella Roaming Client. The driver change update would reset the adapter and fix temporarily. I hope this helps someone else.
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