Enable L2TP in Windows Systems

When trying to establish a L2TP connection from Windows 7, Windows 8 and Windows 10 machines, error 809 is shown. The issue might also appear on Windows Vista and Server 2008.

Now you can exec EnableL2TP.bat to fix it.

[L2TP - Error 809. Cannot connect L2TP to Sonicwall from Windows 7 and Windows 8 PCs. (SW13197)] https://support.software.dell.com/kb/sw13197

[Pre-shared Key Authentication for L2TP over IPSec Router-to-Router VPN Connections]
https://technet.microsoft.com/en-us/library/cc958054.aspx

[How to configure an L2TP/IPsec server behind a NAT-T device in Windows Vista and in Windows Server 2008]
https://support.microsoft.com/en-us/kb/926179

[Start the Remote Access Auto Connection Manager Service]
https://technet.microsoft.com/en-us/library/cc725603(v=ws.10).aspx

[Running Remote Desktop Connection Manager]
https://technet.microsoft.com/en-us/library/ee216762(v=ws.11).aspx

[How to troubleshoot Secure Socket Tunneling Protocol (SSTP)-based connection failures in Windows Server 2008]
https://support.microsoft.com/en-us/kb/947031

[Secure Socket Tunneling Protocol]
https://en.wikipedia.org/wiki/Secure_Socket_Tunneling_Protocol

This program released under MIT License.