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Old 09-19-2011, 09:17 AM   #1
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Forwarding traffic to another machine


I've got small networking problem connected with forwarding traffic. My network looks like this: I have two computers. "A" computer has not access to the Internet. "B" computer has access to the Internet. "A" computer can ping "B".

I want to use Internet from computer "B" on computer "A". How can I do it? Especially it is going me to using services on ports 22, 80, 443. I would be really grateful if you could solve my problem.
Old 09-19-2011, 09:45 AM   #2
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Doesn't understand you much, but do you want something like this (to clarify what you want)?
NOW do you have situation like this:
      /           \
Comp A.         Comp B[/quote]
and you want this:
Comp A. ---> Comp B.
or what?

2. What OS your computers run (Windows, Linux ...) ?

3. what type of internet connection you have (DSL broadband with router and both computers connected to router ?)

Clarify what you want and someone may provide you help.

good luck.

Last edited by lithos; 09-19-2011 at 09:47 AM.
Old 09-19-2011, 10:00 AM   #3
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Now I have situation like this. It's physical network connection:

        /          \
Comp A.   ___     Comp B
I would like to make sth like this:

              SSH server
Comp. A  ---->  Comp. B
-Comp. B should be like a router in this situation.
-OS (on all machines): Linux OpenSuSE 11,
-Comp. A and Comp. B are connected to the router, which has static ip address (but I want to move all traffic from computer A through computer B to router with Internet).

Last edited by eaglefly; 09-19-2011 at 10:04 AM.
Old 09-19-2011, 11:54 AM   #4
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ssh tunneling seems to be what you are looking for.
It is explained here:

It's not clear to me why you want to do this since today you have it working form computer A to the Internet.

Do you want to filter what computer A does?
Do you want to spy what computer A does?
Do you want to free a network port on a switch?
etc ...
Old 09-19-2011, 02:55 PM   #5
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Yes, I have the Internet connection in computer "A" but router doesn't allow computer "A" to connect to external services (like WWW, SSH, FTP etc.). Thanks for your advice connected with SSH tunneling, but I'm looking for more constant, stable solution. I've read a little about routing packets but I don't know how to introduce this solution (my knowledge about netwokring is really small and I have task connected with them in my work). I don't have possibility to change firewall rules on router. I would be grateful for giving me more solutions for my problem.

Last edited by eaglefly; 09-19-2011 at 03:15 PM.
Old 09-19-2011, 03:17 PM   #6
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What you want is using B as a router for A.

If B is running any kind of Linux distribution, and if you have root access on B, look for howtos about NAT-Masquerading.

If available to your distribution, you can even use firewall building utilities such as FireHOL or ShoreWall.

Old 09-19-2011, 03:33 PM   #7
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Thanks for your fast reply. I thought about NAT MASQR. You reassured me that it's good solution. It's advance activity for me and I'll hope that I'll be able to do this. It's possible that I'll write here in nearest time to ask for help with NAT MASQR.


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