L2TP/IPSec RouteOS version 6.41.3

good day!!
Let’s see who can help me with this case.
I have a VPN access configuration L2tp / IPsec, in a RouterOS v6.36, in that version it works correctly.
After upgrading to version 6.42.3, this stopped working.
In the log it is observed that it makes the attempt and finally shows this result: “tunnel X entering state: dead”

The configuration is exactly the same, with IPSec, dynamic

Someone has some idea or recommendation about it?

Thanks!!

Please generate supout.rif file after a failed connection attempt and send it to support@mikrotik.com

Hello!

My problem is same as.
I upgrade the routers the latest 6.42.3, all VPN connection halted.
The L2TP server (L2TP with IPsec) log is only show “firs L2TP UDP packet received from …”
I downgrade the server router 6.42.3 to 6.40.
The VPN is work now.

Problem only in L2TP server, because I have a 6.40 server, and all VPN client run the latest 6.42.3. Its work fine.

Thanks.
Glean