On Thursday 06 February 2003 11:09, David Pick wrote:
> > I believe the protocol used is XDMCP, and works as follows:
> >
> > Client sends a udp packet to the subnet broadcast address, on port 177,
> > and all the servers on the local subnet respond.
>
> That's when the XDMCP client (X display) is looking for any
> XDMCP server that will display a window and offer services
> to the user. This service *may* be a menu service to select
> to which machine the user actually wished to log in.
>
> Many XDMCP clients also have an option of selecting a
> specific machine from a local menu and sending a directed
> XDMCP packet to that machine.
>
Yes, but from the original question:
"however now due to the increasing number of users I would just like the
server to broadcast to the network."
Maybe I'm misreading this, it is somewhat unclear.
> > I have no idea why this would ever work through a router, unless the
> > router is forwarding network broadcasts (which is generally a bad thing).
>
> I'd agree in the first case. In the second case it *should*
> work through a router. A straightforward UDP "keep state"
> rule shoudl allow the XDMCP packets through. Once the XDMCP
> negotiation(s) are complete, the server will need to display
> a login window on the client which is a X11 call from the
> server to port 6000 on the client.
The port 6000 stuff is not relavent to the question, as the computers are not
appearing on the chooser.
Keep state will not work, if the query is sent to the broadcast address, as
the reply will not be from the broadcast address, but from the machine that
is replying.
-Antony
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