Remote Desktop

Kipton Moravec kip at
Mon Aug 16 18:13:12 UTC 2010

> >>
> >> Thanks. That is what I thought it was doing. I have the computer setting
> >> a dynmic dns address and I can get in using ssh. (So yes I know the
> >> address.) But to reconfigure the ATT 2WIRE router I need to be on the
> >> LAN side to log in and it is a web browser interface. Unfortunately the
> >> location of the remote computer is not easy to access, so it is hard to
> >> get in and out for testing.
> >>
> >> Kip
> >>
> >
> > I think I figured out the problem, but do not know how to fix it.
> >
> > Recoup the problem:
> >
> > I have a Xubuntu computer at a remote site behind a NAT Router to the
> > Internet. I directed TCP port 5900 on the Router to point to the Xubuntu
> > Computer port 5900.
> >
> > I tried to access from my home computer using remote desktop on Ubuntu
> > 08.04 LTS and could not get it. I have a dynamic DNS set up and can
> > access the computer with ssh so the IP address is O.K.
> >
> > =============
> >
> > Last Friday I went out there to check on another problem we were having
> > on a different computer and ran vino-preferences on the computer. The
> > window was different than the System->Preferences->Remote Desktop on
> > Ubuntu 08.04.
> >
> > In regular Ubuntu I have a check under the Advanced tab that says "Only
> > use Local Connections". In Xubuntu I do not have the option, and it says
> > local connections only.
> >
> > Am I screwed? Do I have to load 08.04 on that computer to get a remote
> > desktop that is not local, or is there a config file somewhere that I
> > can manually edit? Or is there a different vino-preferences I can get?
> >
> > I put Xubuntu on it because it was an old computer (566 MHz) with not a
> > lot of RAM (384 MB), but the program running uses less than 10% of the
> > resources. And it is the only thing running until I log in. I have to
> > have a window system because the router has a web based interface that
> > is only accessible from the LAN side and I would like to remote desk top
> > in, and then configure the router.
> >
> > Kip
> Hello Kip,
> I should have thought of this (and mentioned it) before.  You could
> probably find a configuration file somewhere on the old Xubuntu
> computer that would allow for remote connections, but you need to be
> aware of what security risks you are exposing that computer to by
> allowing anybody in the world wild internet to connect to your
> computer.  That may not be what you want to do.
> If I understand you correctly, you've said that you can ssh to that
> computer and that you have your router set up for that.  (If I don't
> understand you correctly, then what I'm about to suggest probably
> won't work).
> You can use ssh's "tunneling" capability to log into your Xubuntu
> computer, and tunnel a connection to the VNC server with something
> like:
> $ ssh -L 9000:
> That says "Please connect to using SSH; open
> up local port 9000 and tunnel any connections to that port to port
> 5900 on that computer."  Then point your VNC viewer to localhost:9000
> and you should be connected via an encrypted link to your Xubuntu
> computer.
> --wpd

So I did what you said.

ssh -p 14522  -L 9000:

The router port 14522 points to the xubuntu computer port 22.

The terminal window asked for the PW and logged me in successfully.

I started Remote Desktop viewer and put in localhost for Host and 9000
for Port and the popup window said "Connection to host "localhost:9000"
was closed."

In the terminal window it said: "channel 3: open failed: connect failed:
Connection refused"

I did a find and it called it red.local so I used red.local for the Host
and 9000 for the Port. 

It took a lot longer, 5-10 seconds, before "Connection to host
"red.local:9000" was closed." 

There was no message in the terminal window this time.

Now what do I do? I am logged into the the remote server with ssh.
Which error log do I look at to try to get an idea what is going on?
Should I be looking at the local error log or the remote error log?

Could we be trying to get the router port 5900 not the Xubuntu computer?
The Xubuntu computer has an IP address behind the router of But the terminal window is logged in. This is beyond my
current comprehension.

Thanks for the help.


Kipton Moravec AE5IB .- . ..... .. -...

"Always do right; this will gratify some people and astonish the rest."
--Mark Twain

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