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If you use IP addresses on the same subnet for each UML session, no port forwarding would be necessary. What you do is, on the host set up a tun device specific to each instance of UML. Like so: brctl addbr br0 (to add the bridge), brctl addif br0 <tun interface> (i.e. "tun0" for instance 1, "tun1" for instance 2, etc) Bring them up with a 0.0.0.0 IP address. e.g. ifconfig tun0 0.0.0.0 promisc up You'll have yourself a virtual net then. When you bring up your UML instances, add the following to the argument list: eth0=tuntap,<tun interface>
Replacing <tun interface> with the interface for the UML in question.
After that, it's just like a normal machine with it's very own port on a bridge. The host would have an IP of it's own, and you would direct all VNC traffic to that IP just as you would if you had brought a new machine onto the network.
Hope that helps.
- --Dan Lund
[Automated Quote]Wow, Can you believe Blaisorblade said this[/Automated Quote] on 02/22/05 13:45: | I'm forwarding this to the list as I've no time to answer, sorry. | | ---------- Forwarded Message ---------- | | Subject: RE: [uml-devel] UML remote GUI problems | Date: Wednesday 16 February 2005 20:12 | From: Greg Furlong <[EMAIL PROTECTED]> | To: Blaisorblade <[EMAIL PROTECTED]> | | Hey | | | I just wanted to ask you if what I am doing is possible to do. | | To recap what I am trying to do is to have a host machine and set up tun/tap | networking between the host and a number of UMLs | | I then want to be able to remotely access the UML using something like VNC or | some other remote desk top viewer. | | What I dont understand about connecting to the UML is that when i connect to | my host machine useing VNC I use the hosts IP address but if I wanted to | connect to the UML then I would need to use its IP address but the problem is | that it is a virtual IP address. I understand that the host is acting as a | router so port forwarding would need to be set up to forward the connection | to the UML but how would I could I set up the port forwarding on the fly. | | | Thanks | | |>===== Original Message From Blaisorblade <[EMAIL PROTECTED]> ===== |> |>On Friday 28 January 2005 17:30, Greg Furlong wrote: |> |>>I am a final year student taking a degree in Computing at Dublin Institute |>>of Technology - Ireland. In my final year project I am doing a project |>>using User Mode Linux. My project has set out to research the capabilities |>>of User Mode Linux in a teaching environment. |>> |>>So far I have set up a server |>>and now have users logging on from a terminal. They use a COW file so as |>>not to corrupt the file system. Next I want to investigate and test the |>>capabilities of User Mode Linux over a network using a Graphical User |>>Interface. The problem that I am having is that I am finding it difficult |>>to set up the GUI system. |>> |>>I was wondering if anybody could give me some |>>pointers in the right direction |> |>Without knowing which are your difficulties? It's difficult. |> |> |>>or could tell me of a tutorial on how to |>>set it up. |>> |>>I have already looked at the user mode Linux |>>website on sourceforge but have been unable to successfully complete the |>>GUI instructions. |> |>What's the problem? |> |>You must install Xnest inside your guest system... it will then be able to |>forward connection to another X system (on which you have to authorize TCP |>connections from the UML system). Then it should work, more or less. |> |> |>>I am running Red Hat Linux 9 2.4.20-8 |>>User mode Linux Patch 2.4.27-1 |>>Remote Terminal Putty |> |>On windows? well, there are also Xservers on Windows (the cygwin one for |>instance)... |>-- |>Paolo Giarrusso, aka Blaisorblade |>Linux registered user n. 292729 |>http://www.user-mode-linux.org/~blaisorblade |> |>-- |>This message has been scanned for content and |>viruses by the DIT Information Services MailScanner |>Service, and is believed to be clean. |>http://www.dit.ie | | | -- | This message has been scanned for content and | viruses by the DIT Information Services MailScanner | Service, and is believed to be clean. | http://www.dit.ie | | ------------------------------------------------------- |
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