[Openswan Users] L2TP over IPsec Certificate/Smartcard Authentication

Bart Smink bartsmink at gmail.com
Sun Mar 31 09:15:27 UTC 2013

Hi Артём,

I think it is not possible with L2TP, as you need a link protocol within
IPsec to authenticate and give a virutal interface for the client. Both
Xauth and L2TP require that you enter a username and password. The only way
around this is to write a computer program that starts the windows
authentication process and enters the name and password for you.

Thats theoretical, but to show this in practice I have found something
online for you:

rasdial <vpn_name> <vpn_username> <vpn_password>

To disconnect:

rasdial <vpn_name> /d

Thus, in usable terms, your line would look like this:

System.Diagnostics.Process.Start("rasdial.exe", "My_VPN My_Username

To disconnect from the VPN, simply use this line:

System.Diagnostics.Process.Start("rasdial.exe", "My_VPN /d");

That sound promissing as the username is entered for you now.

Also take a look at this page:

This shows a program in c# to connect a VPN.


Bart Smink

2013/3/24 Артём Конвалюк <artret at gmail.com>
> Hello everyone! I need to use L2TP/IPsec server for roaming users with
> certificate or smartcard authentication (from Window XP/7
> client-side). I mean that there shouldn't be any login/password
> combination. Client should press "Connect" button, choose certificate
> (or enter PIN for smartcard) and that is all.
> Is there any possibilities to do this with xl2tpd + OpenSwan?
> Could anybody help?
> _______________________________________________
> Users at lists.openswan.org
> https://lists.openswan.org/mailman/listinfo/users
> Micropayments: https://flattr.com/thing/38387/IPsec-for-Linux-made-easy
> Building and Integrating Virtual Private Networks with Openswan:
> http://www.amazon.com/gp/product/1904811256/104-3099591-2946327?n=283155

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