Windows 10: How can I connect to l2tp server automatically at start up in windows 10?

Hello. I have been searching for a way to automatically make l2tp connection to a l2tp server in my windows 10 professional pc but I have found none for windows. Everything so far is for linux/ubuntu. Is there a way for windows power shell to make the connection from command line? Thanks in advance.

:)

 

Error: 788, when connecting to L2TP VPN

Hi there, recently I got this error when connecting to "L2TP/IPSec with certificate" VPN. I'm not sure what cause this.

I have already follow some of this steps with no luck :

• Adding AssumeUDPEncapsulationContextOnSendRule
• Restarting both IKE and IPSec services
• Allowing both CHAP and MS-CHAP v2
• Reset network connection
• Connect to different provider
• Re-adding VPN settings

There also little bit information can be found in the event viewer :

CoId={AEE0E2A8-34DF-41BB-B5F0-0458EFD41751}: The user xxx\xxx has started dialing a VPN connection using a per-user connection profile named yes. The connection settings are:

Dial-in User = *\

VpnStrategy = L2TP

DataEncryption = Requested

PrerequisiteEntry =

AutoLogon = No

UseRasCredentials = Yes

Authentication Type = PAP

Ipv4DefaultGateway = Yes

Ipv4AddressAssignment = By Server

Ipv4DNSServerAssignment = By Server

Ipv6DefaultGateway = Yes

Ipv6AddressAssignment = By Server

Ipv6DNSServerAssignment = By Server

IpDnsFlags =

IpNBTEnabled = Yes

UseFlags = Private Connection

ConnectOnWinlogon = No

IPsec authentication for L2TP = Machine certificate.

CoId={AEE0E2A8-34DF-41BB-B5F0-0458EFD41751}: The user xxx\xxx is trying to establish a link to the Remote Access Server for the connection named yes using the following device:

Server address/Phone Number = xxx.xxx.xxx.xxx

Device = WAN Miniport (L2TP)

Port = VPN3-1

MediaType = VPN.

CoId={AEE0E2A8-34DF-41BB-B5F0-0458EFD41751}: The user xxx\xxx dialed a connection named yes which has failed. The error code returned on failure is 788.

***Original title: VPN Error 788***

 

VPN L2TP server

I have previously configured a Windows 10 pc to accept incoming VPN traffic via broadband using PPTP protocol, but now that Apple have discontinued PPTP support on IOS/OSX based devices in favour of other protocols e.g. L2TP/IPsec, I have no apparent
way of accessing my private network via an Apple client and a Windows based VPN server. Is there is a way to do something similar via an Apple based client and a Windows 10 pc running an L2TP based server?

 

Windows 10 L2TP VPN connection issue

Trouble getting Windows to connect to an L2TP VPN

1. Firstly, if the VPN server is behind a NAT and the VPN client is behind a NAT this could cause a problem because apparently "by default Windows does not support IPSec network address translation (NAT) Traversal (NAT-T) security associations to servers that are located behind a NAT device", and this applies to Windows 10 still as well.
   
   The advice given by Microsoft "if you have to put a server behind a NAT device and then use an IPsec NAT-T environment, you can enable communication by changing a registry value on the VPN client computer and the VPN server."
   
   PowerShell (Suggested Fix)
   
   Note: You must run this in an admin elevated PowerShell session.
   
   
   Important: You must restart the machine(s) you apply this to before it's effective.
   
   
   PowerShell (Remove Fix)
   
   Note: You must run this in an admin elevated PowerShell session.
   
   
   Important: You must restart the machine(s) you apply this to before it's effective.
   

If it is not a double NAT issue then . . .

1. It seems perhaps in some configurations port 1701 is used over TCP and UDP both and not just UDP only. Adjust your rule to allow the TCP port 1701 through as well and see if that fixes the problem.
   
   
2. Furthermore, ensure your Windows Firewall "allow" rule(s) for the applicable TCP and UDP ports (and any correlated VPN client software exe's, etc.) from the Advanced tab has all private, domain, and public profiles checked.
   
   
   
   
   
3. Upon further research it's not super clear to me if some of this applies to the client side rather than the VPN server side for L2TP but some advice suggests actually allowing UDP port 50.
   
4. There's another post that also talks about the ESP (value 50) <- Used by IPSec data path and others that refer to the ports used by IPSec protocols and ports.
   

Further Troubleshooting

To troubleshoot further, consider running Wireshark with the Windows Firewall disabled and make the successfully VPN connection and save that trace. Then with the Windows Firewall enabled, run a new trace, attempt a VPN connection, and save that trace.

Now you can look over both successful and unsuccessful L2TP VPN connection traces, filter, and see at the packet level what is really going on to determine what further you may need to allow through the Windows Firewall.

Supporting Resources

• How to configure an L2TP/IPsec server behind a NAT-T device in Windows and in Windows Server
  
• Windows 10 L2TP/IPsec Manual Setup Instructions
  
• What is a NAT firewall and how does it work?
  
• Set-ItemProperty
  
• Remove-ItemProperty
  
• L2TP Ports
  
• Understanding Firewall Profiles
  
• Layer 2 Tunneling Protocol