WIN10连接L2TP VPN失败处理方法

REG ADD HKLM\SYSTEM\CurrentControlSet\Services\PolicyAgent /v AssumeUDPEncapsulationContextOnSendRule /t REG_DWORD /d 0x2 /f

REG ADD HKLM\SYSTEM\CurrentControlSet\Services\RasMan\Parameters /v ProhibitIpSec /t REG_DWORD /d 0x0 /f

来源(有详细的VPN相关说明)：https://github.com/hwdsl2/setup-ipsec-vpn/blob/master/docs/clients-zh.md