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Old 05-28-2009, 03:28 PM   #1
JustinKubicek
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Port forwarding: Directing traffic to a ssh client


Hello everyone,
I'll give you all of the information I have. I'm using UVNC and SingleClick, so far I've gotten it all to work correctly. Here how things work so far, the user downloads the server and it connects to a viewer that is listening on xxx.xxx.xxx.xxx:5500. My problem is that I might be at yyy.yyy.yyy.yyy behind a router. I was wounding it I could open the port on my machine (yyy.yyy.yyy.yyy) and bring that port to xxx.xxx.xxx.xxx:5500, so when the user opens their server to connect to me, xxx.xxx.xxx.xxx forwards all of the traffic to my viewer at yyy.yyy.yyy.yyy:5500. I know that this concept does not only apply to UVNC, so you answers do not need to be specific. Also, there might be a chance that I'll be viewing from a windows machine so I might need to use cygwin or putty. I've gotten it to work part way if I use ssh -g -R *:5500:72.15.37.156:5500 root@host, but only the remote machine has access to the port, I need other machines to be redirected.

thank you for all of your input!

Justin
 
Old 05-29-2009, 01:20 PM   #2
ramram29
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The viewer uses random non service ports 1024 to 65535. There is no way to tell what port the viewer is using - it picks them randomly. The server uses only one port 5500 (Usually 5900 or 5800). VNC is simple - clients connect to server. What exactly are you trying to do?
 
Old 05-29-2009, 04:43 PM   #3
JustinKubicek
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Thanks for your response. The whole thing gets confusing with SingeClick and VNC, but I can try to explain it in a different way. Lets say I have a domain name, example.com, that points to node1, and I'm at node2. Node1 isn't running a webserver, but I have one running at node2. I want to connect to node1 with node2 using ssh, so when someone visits example.com they see the website that is located at node2. I hope this makes more sense.

Thanks again,
Justin
 
Old 05-29-2009, 04:48 PM   #4
jamescondron
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Port forwarding, its in your router config
 
Old 05-29-2009, 09:35 PM   #5
JustinKubicek
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Thats how I do it now... The idea here is if I'm at a hotel, or dialing to the internet using a cell phone, etc.

As an update I've gotten it to work using a reverse ssh tunnel. Here is the command:

ssh -R *:80:*:80 host1

The problem now is the only computer that can acess the port on the remote machine, is the remote machine. I need other computers to be able to connect to the remote machine.

Thanks...this whole thing is starting to work.

Justin
 
Old 05-31-2009, 01:00 PM   #6
JustinKubicek
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Registered: May 2009
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I got it working I had to enable GatewayPorts in /etc/ssh_config and /etc/sshd_config...as layed out in this document, under "Port Forward Security". Thanks for everyone's help!

I wrote a blog post about this at http://www.justinkblog.com/2009/06/u...ile-youre.html.

Last edited by JustinKubicek; 06-02-2009 at 06:18 PM.
 
  


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