[CentOS] [OT] Remote control of a WinXP machine from a Linux host

[Christopher Chan]

> the connection must be initiated from C's side to A. This simply cannot work 
> simultaneously, so I tried to make use of my public server B which can be 
> used as a "bridge" between A and C. So, A connects to B, C connects to B, and 
> then A and C communicate. Roughly speaking...
> 
> That was my initial idea, but seems too complicated to work out, so I asked 
> for a possible easier alternative. :-)
> 

Easy. John R Pierce's idea works no problem. Just do it the other way 
round for A.

A will run ssh (or putty) and connect to B with a ssh key and do port 
forwarding.

So instead of ssh -L as suggested by John, do the equivalent of ssh -R on A.

Then your problem will become: how do I secure B:3389 against 
unauthorized connections. Again, ssh (or putty) on C -> B to the rescue.

Back to John's suggestion. C will do ssh -L and B will firewall all 
access to port 3389 except from localhost.


  A ssh -R3389(or whateverA):localhost:3389
  |
  |
\|/

  B

/|\
  |
  |
  C -L3389(or whateverB):localhost:3389(or whateverA)

rdesktop or Remote Desktop on C connections to localhost port 3389 (or 
whateverB)