Re: IAS VPN authentication only grants access to domain if user has certificate

From: FenderAxe (fa_at_axe.com)
Date: 03/14/05


Date: 14 Mar 2005 04:32:31 GMT

If you are using IAS, the VPN server does not authenticate the user at all
-- the VPN server forwards the connection request to IAS, and IAS handles
the authentication of the user, and performs checks to see if the user is
authorized to connect to the network based on remote access policy
configuration and/or the dial-in properties of the user account in Active
Directory.

How this all works is documented in the IAS Technical Reference. You can
find that here:

http://www.microsoft.com/resources/documentation/WindowsServ/2003/all/techr
ef/en-
us/Default.asp?url=/resources/documentation/windowsServ/2003/all/techref/en
-us/W2K3TR_ias_intro.asp

<anonymous@discussions.microsoft.com> wrote in
news:704501c525fd$eeb59b80$a601280a@phx.gbl:

> The question is how does the non-PEAP (vpn connection)
> authenticate a certificate against AD?
>
> It seems that somehow the PEAP auth takes place even though
> it is not specified.
>
> So my question is at what point does the VPN connection use
> the certificate?
> The vpn checks against AD and allows connection based on
> username/password. IAS then obviously continues to check if
> the certificate is present. If it is the vpn user is logged
> in to the domain. This is the non-documented piece.
>
> Can someone explain?
>
>

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