windows10 L2TP/Ipsec VPN

 
regedit 수정

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\PolicyAgent

새로 만들기 : DWORD (32 비트) 값

이름 : AssumeUDPEncapsulationContextOnSendRule

수정

값데이터 : 2

재부팅

https://support.microsoft.com/ko-kr/help/926179/how-to-configure-an-l2tp-ipsec-server-behind-a-nat-t-device-in-windows