L2TP VPN can not connect on Windows 10

calvinsteel · 2019-07-03T12:02:12.951Z

I am new vpn user and I have configured an L2TP server with a shared key on my laptop. I have tried numerous ways like disabling of firewall but it can’t connect. Anyone can help me.

jeffsf · 2019-07-03T16:12:49.914Z

PPTP or IPSec? The former is hopefully not supported at all, as it has been revealed to have severe security faults.

calvinsteel · 2019-07-04T14:38:15.599Z

IPSec. I think that is why I am facing the issue. But I read many guide regarding l2tp like
https://www.vpngate.net/en/howto_l2tp.aspx

expressvpn.com

Layer 2 Tunneling Protocol L2TP/IPsec | ExpressVPN

Get superior security using L2TP paired with IPsec. Together they provide a more secure option to PPTP, but come with the same easy setup.

https://www.purevpn.com/what-is-vpn/protocols/l2tp
In every guide they just mention the setup not provide any proper solution.

jeffsf · 2019-07-04T17:52:11.560Z

Confirm that you aren’t blocking and are forwarding the protocols involved. As I recall, they are 50 and 51 for ESP and AH, respectively. Since you’re going through NAT, you may need to forward the ISAKMP UDP on port 500 as well (though many devices, especially those intended for non-technical users, such as micro-cells and VOIP boxes, have ways of opening the UDP port when needed to the specific server and port associated with the IPSEC connection).

calvinsteel · 2019-07-05T06:20:17.254Z

How could I confirm? I don’t have enough knowledge. Please assist me step by step.