2 slow 
Thank you for sharing I liked the Client “Draytek” it’s very useful.
Did you test all the protocols working with MT?
Just L2TP with IPSEC
I will test them all today.
It would be nice if MT would also provide something like this.
M$
Omg
You will need to tell windows to NOT run updates or that bug laden update will be reinstalled and you’ll have the same problem. On windows10 settings => windows update settings => pause it for as long as possible.
Trying out the patch https://support.microsoft.com/en-gb/help/5010793 that is supposed to fix it (it’s in optional updates as of writing this)
EDIT: Looks like it helped (standard Win10 Home 10.1.19044 built in L2TP/IPSec shared secret client + Mikrotik L2TP server)
Press Sauce: https://petri.com/microsoft-releases-out-of-band-vpn-patches-windows-server
Thought I’d try the Draytek Smart VPN client as I hate all the windows updates breaking things.
I can’t seem to get it to work to what was a perfectly fine Microtik using l2tp/ipsec.
I just get “unknown error”
Log on Mikrotik says: "phase1 negotiation failed due to time up:
Seems like a nice solution if I can get it to work. I think I have tried all the options in the client
Tom
Followup in case anyone is interested.
I had to install KB5010793 to fix the VPN before the Draytek client would work,
Thanks for all the info in all the posts here. Now to fix a bunch of clients.
Tom
My Win10 laptop hadn’t been updated since late last year. Today tested L2TP/IPSec and it works - I am mystfied why a client’s Win11 machine doesn’t (with the error above) when connecting to an RB3011. I see this thread. ^&*#%@!
Ran recommended Win10 updates and the VPN stopped with the same new error. Curses.
Refreshed the updates again and it’s just finished installing 2022-01 Preview Cumulative Update 21H2 (KB5009596) and now the VPN is working again.
I’ll get the client to try updating his Win11 machine to see if it’s fixed for him too. He updated Win11 just now and the VPN is working again.