L2TP connection Error 789

[eriq2207]

Hi,

I am trying to connect to VPN Server with L2TP and Windows VPN connection creator. I am getting Error 789. I know that there is a lot of posts on the internet with potential solutions but nothing works for me. I turn on L2TP on server side and enable IpSec and IpSec key services on client side. I've also add new register key. I followed this tutorial: https://www.softether.org/4-docs/2-howt ... ient_Setup

Server log:
2019-03-11 13:17:57.381 Connection "CID-31" terminated by the cause "No error." (code 0).
2019-03-11 13:17:57.381 Connection "CID-31" has been terminated.
2019-03-11 13:17:57.381 The connection with the client (IP address 37.47.66.34, Port number 19313) has been disconnected.
2019-03-11 13:18:39.391 On the TCP Listener (Port 0), a Client (IP address 37.47.66.34, Host name "public-gprs367329.centertel.pl", Port number 12913) has connected.
2019-03-11 13:18:39.391 For the client (IP address: 37.47.66.34, host name: "public-gprs367329.centertel.pl", port number: 12913), connection "CID-32" has been created.
2019-03-11 13:18:39.391 SSL communication for connection "CID-32" has been started. The encryption algorithm name is "RC4-MD5".
2019-03-11 13:18:41.105 Connection "CID-32" connected using server admin mode.
2019-03-11 13:18:41.105 Connection "CID-32" successfully logged in using administration mode.
2019-03-11 13:18:41.105 Connection "CID-32" created a new remote procedure call session "RPC-92" for the purpose of administration mode.

[cedar]

Did you configure port forwarding on the server-side router?