USG110 IPsec/L2TP VPN using Windows10 Client
I using a USG 110 unit and installed with the wizzard a L2TP VPN. My USG is behind an "LTE Cube", I forwarded ports 500 and 4500 to the WAN port of the USG. I have no possibility to turn off the "LTE Cube" router or NAT to work only as a modem!
In Windows10 I configured an VPN Client
VPN Type: L2TP/IPsec, Key (same as in USG:) only PAP as suggested in a zyxel YouTube. Connecting the Client results to an L2TP Connection error ... not possible to negotate compatible Parameter with the remote Computer... (translated from German sorry). Wireshark Shows that the communication over port 500 and 4500 was possible, but stops in ISAKMP "Informational". I guess that something with the configuration on Server or Client side is wrong.
Any idea or sample on how to solve this Problem is appreciate.
Thanks in advance, Simon