Hello
It is currently in use by installing SoftEther VPN Server on Linux instance on AWS.
And general users are connecting to the server via OpenVPN in Windows and MAC environment.

During this time, the following logs are displayed at the time of server connection and there is a phenomenon that it is not possible to connect to the server.

Wed Jun 14 16:38:34 2017 SENT CONTROL [vpn * .softether.net]：「PUSH_REQUEST」（status = 1）
Wed Jun 14 16:38:39 2017 SENT CONTROL [vpn * .softether.net]：「PUSH_REQUEST」（status = 1）
Wed Jun 14 16:38:44 2017 SENT CONTROL [vpn * .softether.net]：「PUSH_REQUEST」（status = 1）
Wed Jun 14 16:38:50 2017 SENT CONTROL [vpn * .softether.net]：「PUSH_REQUEST」（status = 1）
Wed Jun 14 16:38:51 2017 AUTH：Received control message：AUTH_FAILED
Wed Jun 14 16:38:51 2017 SIGUSR1 [soft、auth-failure] received、process restarting
Wed Jun 14 16:38:51 2017 MANAGEMENT：> STATE：1497425931、RECONNECTING、auth-failure ,,,,,
Wed Jun 14 16:38:51 2017 Restart pause、5 second（s）

Although the account ID / PW is normal, the above phenomenon appears, and when you restart SoftEther VPN Server, it will be reconnected.

What are the causes and solutions?

Having a VPN client’s connection rejected is perhaps the most common VPN problem. Part of the reason this problem is so common is that there are a lot of issues that can cause a connection to be rejected. If your VPN server is rejecting client connections, the first thing you need to do is to check to make sure the Routing And Remote Access service is running. You can check this by opening the server’s Control Panel and clicking on the Administrative Tools icon, followed by the Services icon.