"Pure" L2TP on Windows

Windows的L2TP預設是有IPsec Encryption的，關掉它
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RasMan\Parameters]
"ProhibitIPSec"=dword:00000001 =>改成0

How to disable the automatic L2TP/IPsec policy in Windows 2000 Server