Port forwarding through shared internet connection

Question

I have shared my internet connection via Ethernet with another computer, using the shared option under Ethernet in Network settings. I believe this is working but I can't know for sure as I am unable to access Computer 2, because I don't have a monitor for it.

Router ‒‒‒‒‒‒‒‒‒‒> Computer 1 (Ubuntu) ‒‒‒‒‒‒‒‒‒‒> Computer 2 (Other Linux)

So the first question is: how do I find out the IP of Computer 2 so I can SSH to it from Computer 1.

And: how can I forward a port right through from my router to the machine using the shared connection (computer 2).

score 3 · Answer 1 · edited Feb 12 '17 at 07:01

3

To answer your second question, use rinetd.

See this page for more details: http://www.ubuntugeek.com/rinetd-redirects-tcp-connections-from-one-ip-address-and-port-to-another.html

edited Feb 12 '17 at 07:01

Ciro Santilli OurBigBook.com

31,312

answered Oct 02 '14 at 02:15

Senshi

31
1

score 2 · Answer 2 · edited Mar 11 '17 at 19:03

2

You can use nmap Install nmap to scan the subnet to find Computer 2.

For example:

# nmap -T4 -F 10.42.0.*

will find the computers present 10.42.0.0 subnet. Some scripting can then be used to isolate the Ip found.

Still looking myself for your 2nd question ;)

edited Mar 11 '17 at 19:03

Community

1

answered Oct 17 '13 at 17:48

big_gie

141

Port forwarding through shared internet connection

2 Answers2