AW: Question regarding GUPnP and VPN

[Alexander Kirschner <alexander kirschner jambit com>]

@ Ross: For the normal roadwarrior-/homeoffice-scenario I am with you a hundred percent, but our specific setting is kind of different. We need to bridge two networks via VPN/TAP and then use UPnP over it - and we would love to do this using GUPnP. For now we can live using the "workaround" by directly starting the control point on the virtual tap0-interface, although a switch for ignoring/considering such virtual adapters would in our case be useful. Besides that I found your commit from about two years ago: "Make GSSDPClient ignore Point to Point interfaces so that GUPnP stops putting stuff on my VPN connection". From our point of view the question if UPnP/Multicast packets should be transmitted over VPN should be configured in the VPN-settings (TAP-interface) and not in the specific UPnP library - in other words GUPnP should not make a difference. (But we know that our setting is quite unusual.)

@ Jens: Thanks for the information, right now we are not so sure whether or not a TAP interface is considered as being point-to-point. As I already wrote in my last email the SSDP-notifies actually are transmitted over the VPN-connection, but there are no M-searches. If you have any further idea on that matter please let us know.

Alex

-----Ursprüngliche Nachricht-----
Von: gupnp-list-bounces gnome org [mailto:gupnp-list-bounces gnome org] Im Auftrag von Jens Georg
Gesendet: Freitag, 21. Oktober 2011 10:50
An: Burton, Ross
Cc: gupnp-list gnome org
Betreff: Re: Question regarding GUPnP and VPN

On Do, 2011-10-20 at 17:09 +0100, Burton, Ross wrote:
> On 20 October 2011 16:50, Zeeshan Ali (Khattak) <zeeshanak gnome org> wrote:
> > On Thu, Oct 20, 2011 at 6:36 PM, Alexander Kirschner
> > <alexander kirschner jambit com> wrote:
> >> Hi *,
> >> So my questions are:
> >>
> >> 1. Are there any known issues regarding GUPnP and VPN?
> >
> >   As you figured, we ignore VPN connections. For the record, I was
> > against this change from Ross.
> >
> >   Ross?
> 
> I'd be in mild shock if UPnP worked over a VPN connection.  I know I'd
> be terrified of running the universal CP on my VPN connection
> (starting it in one of the Intel offices is known to make the
> universal CP block for a while because it discovers hundreds of
> devices).
> 
> That said if you explicitly specify the device, I thought it would
> work (without looking at the code).

no, gssdp also explicitly skips PTP addresses:

                else if ((ifa->ifa_flags & IFF_POINTOPOINT))
                        continue;



> 
> Ross
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> gupnp-list gnome org
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