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Windows Forum / Windows XP / Remote Desktop / February 2006

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Speedtouch 546 modem/router and remote desktop

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Shiva - 25 Feb 2006 19:51 GMT
Hi,

I'm trying to get the remote desktop facility on the run with my new
speedtouch 546 modem/router. I've got 2 computers, let's call them computer
1 and 2, and I want to remotely control them by computer 3 (= the remote
computer).
Furthermore:
- computer 1 and 2 are behind the router of the speedtouch 546
- computer 1 and 2 both have an fixed ip-address assigned in the 192.x.x.x
range
- I've enabled remote desktop by checking "My Computer->properties->tab
remote->allow users to remotely connect to this computer" and by checking
"Control panel->windows
firewall->Exceptions tab->remotedesk"

I can imagine it doesn't work right now. After all, I do have to indicate
which computer (1 or 2) I want to remotely control. After some searching on
the internet I found out that this probably requires Network Address
Translation. This way the port could indicate the computer to be taken over.
For example, computer 3 connecting to address <my public ip-address>:3367
should take (e.g) over computer 1, <my public ip-address>:3368 should take
over computer 2. These public addresses ought to be translated to my local
ip-addresses by NAT.
Does this make sense it all? If so, where can I enter the Network Address
Translation. The webbased speedtouch utility (address: 10.0.0.138) does not
seem to provide Network Address Translation (where can I find it?)
If my solution doesn't make any sense at all, how would you implement the
remote (desktop) control of computers behind a router?

Thanks a lot.
beb - 26 Feb 2006 01:33 GMT
Start with networking. Can you RDC on the local network, comp-1 to comp-2
and vice versa, comp-2 to comp-1. This should be your first step. If you are
able to reach the internet from behind the router from both computers you
are using Nat which usually automatically configured on the router. Download
your manual and read it. It probably has a section pertaining to Nat,
although that is not what's your problem is. Read the section in your manual
about port forwarding and how to enable UPnP. You have configure the router
to forward the RDP port number you have selected to the correct listening
port you have configured on your computers behind the router.

> Hi,
>
[quoted text clipped - 26 lines]
>
> Thanks a lot.
Shiva - 27 Feb 2006 08:46 GMT
Thanks for your reply.

> Start with networking. Can you RDC on the local network, comp-1 to comp-2
> and vice versa, comp-2 to comp-1. This should be your first step. If you
> are able to reach the internet from behind the router from both computers
> you are using Nat which usually automatically configured on the router.
> Download your manual and read it. It probably has a section pertaining to
> Nat,

It's working right now! Speedtouch has a command line utility and it works
after executing these commands:

nat mapadd intf=Internet type=napt inside_addr=<intern ip-address computer
1>
outside_port=3389 inside_port=3389 (for computer 1)

nat mapadd intf=Internet type=napt inside_addr=<intern ip-address computer
2>
outside_port=50000 inside_port=3389 (for computer 2)

You have to enter <public address>:50000 in the RDP-client order to remotely
control computer 2.

> although that is not what's your problem is. Read the section in your
> manual about port forwarding and how to enable UPnP. You have configure
> the router to forward the RDP port number you have selected to the correct
> listening port you have configured on your computers behind the router.

Hmm.. the command I entered is related to NAT. But I guess it's doing "port
forwarding"?
beb - 27 Feb 2006 09:54 GMT
Just as I thought someone just wanted to show off.

> Thanks for your reply.
>
[quoted text clipped - 27 lines]
> Hmm.. the command I entered is related to NAT. But I guess it's doing
> "port forwarding"?
Shiva - 27 Feb 2006 10:41 GMT
> Just as I thought someone just wanted to show off.

I beg your pardon?!? What is it you are suggesting?
 
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