L2TP/IPSEC VPN and latest Windows 10 KB5009543 update Bug

General questions
1

Hi there,

As you may know recent Microsoft Windows Update for W10/W11 broke the L2TP/IPSEC VPN
reddit topic KB5009543 - January 11, 2022 Breaks L2TP VPN Connections : sysadmin (reddit.com)

There are only two workarounds on the client side -

  1. uninstall update,
    KB5009543 - January 11, 2022 Breaks L2TP VPN Connections : sysadmin (reddit.com)

and
2) disable IPec tunneling
L2TP VPN fails with error 787 - Windows Server | Microsoft Docs

But as Microsoft confirmed problem in L2TP is the unknown Vendor ID sent from L2TP server.
Windows 10, version 21H2 | Microsoft Docs

So, question is very simple - is there any option to change/remove Vendor ID in VYOS vpn settings?

VYOS 1.2 202101 Rolling release.

Thanks.

3

Error already fixed by out of channel updates
KB5010793 (windows10)
KB5010795 (windows11)

Windows 10, version 21H2 | Microsoft Docs

So everything is looking fine now.

4

Hi @hook.ua do you know, is Microsoft planning to add DPD support (IPSec/L2TP)?

5

Hi, Dmitry

Sorry, have no idea about that option in Windows.
Still using night ‘restart vpn’ script