No Client VPN for anyone

CashG
Getting noticed

No Client VPN for anyone

So our Client VPN has worked fine for a long time but now no one can connect. Nothing has changed so I don't understand what is going on. 

Client side they get the The L2TP Connection Attempt Failed Because the Security Layer Encountered a Processing Error. I've checked and the IKE and AuthIP services is running. 

I tried to do a packet capture but not sure what I'm looking for. I do see one for the Clients IP and I see the ISAKMP Phase 1 where it says Next payload: Security Association (1) but I don't see anything about a Key Exchange.

3 REPLIES 3
CashG
Getting noticed

I just now noticed another post about a Windows update. I'll try that. 😁

CashG
Getting noticed

Ok, that fixed one Client now I just have to make sure everyone else is up to date. 

Brash
Kind of a big deal
Kind of a big deal

Yeah, that one got us too.
The Windows 10 Jan 2022 update broke L2TP VPN connectivity.
Thanksfully MS released an out-of-band update to fix it soon-after.

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