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XDMCP in VirtualBox

https://forums.virtualbox.org/viewtopic.php?t=40106

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XDMCP in VirtualBox

Posted: 21. Mar 2011, 20:32
by kpedersen
Hello,

I have been trying to get XDMCP working within VirtualBox for some time. I have forwarded the TCP and UDP ports which I think are needed because the network type is NAT:-

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VBoxManage setextradata OpenSolaris "VBoxInternal/Devices/pcnet/0/LUN#0/Config/ssh/HostPort" 6000
VBoxManage setextradata OpenSolaris "VBoxInternal/Devices/pcnet/0/LUN#0/Config/ssh/GuestPort" 6000
VBoxManage setextradata OpenSolaris "VBoxInternal/Devices/pcnet/0/LUN#0/Config/ssh/Protocol" TCP

VBoxManage setextradata OpenSolaris "VBoxInternal/Devices/pcnet/0/LUN#0/Config/ssh/HostPort" 6001
VBoxManage setextradata OpenSolaris "VBoxInternal/Devices/pcnet/0/LUN#0/Config/ssh/GuestPort" 6001
VBoxManage setextradata OpenSolaris "VBoxInternal/Devices/pcnet/0/LUN#0/Config/ssh/Protocol" TCP

VBoxManage setextradata OpenSolaris "VBoxInternal/Devices/pcnet/0/LUN#0/Config/ssh/HostPort" 6002
VBoxManage setextradata OpenSolaris "VBoxInternal/Devices/pcnet/0/LUN#0/Config/ssh/GuestPort" 6002
VBoxManage setextradata OpenSolaris "VBoxInternal/Devices/pcnet/0/LUN#0/Config/ssh/Protocol" TCP

VBoxManage setextradata OpenSolaris "VBoxInternal/Devices/pcnet/0/LUN#0/Config/ssh/HostPort" 6003
VBoxManage setextradata OpenSolaris "VBoxInternal/Devices/pcnet/0/LUN#0/Config/ssh/GuestPort" 6003
VBoxManage setextradata OpenSolaris "VBoxInternal/Devices/pcnet/0/LUN#0/Config/ssh/Protocol" TCP

VBoxManage setextradata OpenSolaris "VBoxInternal/Devices/pcnet/0/LUN#0/Config/ssh/HostPort" 6004
VBoxManage setextradata OpenSolaris "VBoxInternal/Devices/pcnet/0/LUN#0/Config/ssh/GuestPort" 6004
VBoxManage setextradata OpenSolaris "VBoxInternal/Devices/pcnet/0/LUN#0/Config/ssh/Protocol" TCP

VBoxManage setextradata OpenSolaris "VBoxInternal/Devices/pcnet/0/LUN#0/Config/ssh/HostPort" 6005
VBoxManage setextradata OpenSolaris "VBoxInternal/Devices/pcnet/0/LUN#0/Config/ssh/GuestPort" 6005
VBoxManage setextradata OpenSolaris "VBoxInternal/Devices/pcnet/0/LUN#0/Config/ssh/Protocol" TCP

VBoxManage setextradata OpenSolaris "VBoxInternal/Devices/pcnet/0/LUN#0/Config/xdmcp/HostPort" 3333
VBoxManage setextradata OpenSolaris "VBoxInternal/Devices/pcnet/0/LUN#0/Config/xdmcp/GuestPort" 177
VBoxManage setextradata OpenSolaris "VBoxInternal/Devices/pcnet/0/LUN#0/Config/xdmcp/Protocol" UDP
And I have setup XDMCP on the OpenSolaris guest (I can connect inside the VM locally using Xephyr).

But when I issue the following command on the host, it doesn't do anything (just stays at a black screen)

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Xephyr :1 -query localhost -port 3333
Has anyone else managed this?

Best Regards,

Karsten

Re: XDMCP in VirtualBox

Posted: 21. Mar 2011, 20:51
by Perryg
What version of VirtualBox?

Re: XDMCP in VirtualBox

Posted: 21. Mar 2011, 22:00
by kpedersen
The Version is 3.2.12_OSE r68302 which is the latest in the FreeBSD ports collection.

Though if the solution is with another version on another host platform, then I am quite happy to migrate.

Thanks.

Re: XDMCP in VirtualBox

Posted: 21. Mar 2011, 22:05
by Perryg
The syntax for the port forwarding is different than the ones you are trying to use. (older version of VirtualBox)
See Chapter 6.3.1 Configuring port forwarding with NAT in your VirtualBox users manual to see how it is properly done with this version.

Re: XDMCP in VirtualBox

Posted: 21. Mar 2011, 22:22
by kpedersen
Ok, the new setup uses

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VBoxManage modifyvm "OpenSolaris" --natpf1 "guestssh,tcp,,8022,,22"
VBoxManage modifyvm "OpenSolaris" --natpf1 "guestxdmcp,udp,,8177,,177"
VBoxManage modifyvm "OpenSolaris" --natpf1 "guestx0,tcp,,6000,,6000"
VBoxManage modifyvm "OpenSolaris" --natpf1 "guestx1,tcp,,6001,,6001"
VBoxManage modifyvm "OpenSolaris" --natpf1 "guestx2,tcp,,6002,,6002"
VBoxManage modifyvm "OpenSolaris" --natpf1 "guestx3,tcp,,6003,,6003"
VBoxManage modifyvm "OpenSolaris" --natpf1 "guestx4,tcp,,6004,,6004"
VBoxManage modifyvm "OpenSolaris" --natpf1 "guestx5,tcp,,6005,,6005"
I have added ssh forwarding to test if it works as it did using the previous method and it has no trouble connecting

But I still cannot connect to the guests XDMCP session from the host.

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Xephyr -port 8177 :1 -query localhost
Just sits there with a black screen.

is it something to do with the ports 6000-6005 conflicting with my current running xserver?

Re: XDMCP in VirtualBox

Posted: 21. Mar 2011, 22:31
by Perryg
You might want to look at the machine.xml and make sure that with all the changes you don't have conflicting statements now. BE SURE to back it up first before you edit it.

Re: XDMCP in VirtualBox

Posted: 21. Mar 2011, 22:56
by kpedersen
Yes, made sure to clean out the .xml file before.

It seems to be working fine for ssh, so I am beginning to think there is either an issue with udp or the ports which xdmcp directs the client to.

as a temporary workaround I am using ssh/X to forward the remote Xephyr (or Xnest)

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ssh -p 8022 -X -C -l karsten localhost -n /usr/X11/bin/Xephyr :1 -ac -once -query localhost
Some websites say this is preferable anyway since it does a small amount of compression.
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