Configuring hwdsl2/ipsec-vpn-server docker container on CentOS 7.2. No connection?

Question

VPN

CentOS 7.2
Launched this container: https://hub.docker.com/r/hwdsl2/ipsec-vpn-server/
Everything is ok in the logs:

IPsec VPN server is now ready for use!
Connect to your new VPN with these details:
Server IP: x.x.x.x
IPsec PSK: xxx
Username:xxx
Password: xxx

But I can't connect to vpn:
https://yadi.sk/i/zUW4WKPNsxtKW
What could be the problem?

Answer 1

https://support.microsoft.com/en-us/kb/926179