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Re: [Openvpn-users] Client authentication


  • Subject: Re: [Openvpn-users] Client authentication
  • From: Erich Titl <erich.titl@xxxxxxxx>
  • Date: Thu, 09 Nov 2006 00:15:02 +0100

Hi Marcos

Marcos Morais wrote:
> Hi Erich, first of all explain these expressions that you used for me:
> M$ 

The big, rich company in Redmond :-(

> AD

Active directory, in this case, anno domini in most others :-)

> IMHO

in my humble opinion

> TGT

ticket granting ticket, a kerberos term

> 
> Let's see if I Understood:
> What you're saying is that OpenVPN doesn't have a native package that
> allows
> that kind of authentication, and to have that working on my VPN I should
> either use a commercial VPN software that has It, or to add a third party
> plugin that does it for me?  is that what you meant?

I don't know of any for OpenVPN, but certainly there are IPSEC
implementations which do that.

I was referring to the fact that there are two facets to data access,
authentication and authorization. Authentication is possible against AD
using, for example, the ldap authentication plug-in. Authorization is a
completely different matter. I believe actually M$ is using kerberos
tickets to grant access to data located on their servers. So in order to
get access at that level you need a ticket, and in order to get one, you
need a TGT, which you can get when you authenticate against their
kerberos implementation.

cheers

Erich


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