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jfbueno
New Contributor II

Can't connect to IPsec VPN in Windows 11

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

 

error.png

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?

 

1 Solution
SkepticSensei

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. 

View solution in original post

37 REPLIES 37
VincentCA

Now that I'm looking, I do see a Realtek, but it's for the USB (Realtek USB GbE Family Controller).
Other than that, this is what I have: 

  • Fortinet SSL VPN Virtual Ethernet Adapter
  • Fortinet Virtual Ethernet Adapter (NDIS 6.30)
  • Killer(R) Wi-Fi 6E AX1690i 160MHz Wireless Network Adapter (41 INGW) #4

Primarily I use WIFI when trying to connect to the ipsec VPN.

BillWabo
New Contributor II

 

Try to install the windows 10 on windows 11.  That worked for us.(Win10 Auto Installation Program (NDIS)

https://www.realtek.com/en/directly-download?downloadid=0b79af1e7509a5c294810f433179dbe6

 

Let’s us know it’s working!

VincentCA

Tried installing it and got the following error. After finishing the install it still doesn't connect.

Screenshot 2023-05-02 183820.png

Side-note: Link you sent didn't work, but I followed the download path of the original solution and downloaded the NDIS from there.

VincentCA

Still no luck. All new computers I've been setting up with Windows 11 will not work with IPSec.

routeleak

Thank you so much! I'll add that I installed the Win10 driver, version number 1.1.4.38. Got it from the LAN driver package from Asus' website.

gaitolini

  1. Identifique seu Controlador de Ethernet: Primeiro, descubra qual é o controlador de Ethernet em seu sistema. No seu caso, você mencionou que resolveu o problema com um driver Realtek PCIe FE/GbE/2.5G. Certifique-se de conhecer o modelo específico do controlador Ethernet.

  2. Faça o Download da Versão do Driver: Acesse o site do fabricante do seu controlador Ethernet (no caso da Realtek, o site da Realtek) e baixe a versão mais recente do driver. No entanto, você mencionou que a versão 10.68 do driver funcionou para você. Portanto, você pode optar por baixar essa versão específica se estiver disponível.

  3. Desinstale o Driver Atual: No Windows 11, desinstale o driver Ethernet atual. Você pode fazer isso acessando "Gerenciador de Dispositivos," localizando o adaptador de rede Ethernet e selecionando a opção de desinstalação. Certifique-se de reiniciar o computador após a desinstalação.

  4. Instale a Nova Versão do Driver: Após reiniciar o computador, instale a nova versão do driver Ethernet que você baixou no passo 2.

  5. Conecte à VPN: Após a instalação do novo driver, tente se conectar à VPN IPsec novamente usando o FortiClient. A conectividade deve ser restaurada.

    Obrigado @SkepticSensei 

ddawson

Dec 2023 and this is still valid! I had a RealTek Family Controller on Windows 11 and this Win 10 installer worked for me:

 

https://www.realtek.com/en/component/zoo/category/pci-8169-8110

armandoa

It worked! Thanks!

marcoperson_250

Great informative links 

mdilena
New Contributor

Thanks @SkepticSensei , I just downgraded to 10.54 and everything started working!

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