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I am currently housing in a place that allows only a limited number of devices connected to the internet. Problem: I have more devices than allowed. So I have one Ubuntu machine which is connected via Ethernet and now I would like to share it's connection, but without that the connected device generates an new IP (via DHCP) and thus wouldnt count up against the limit. Available interfaces: WiFi and Bluetooth. I want the devices connected to my Ububtu machine to go out to the internet AS the Ubuntu machine.

What technologies / protocols / permit this? Forgive me if it is a stupid question, but I dont understand well all the different networking technologies. Thanks a lot already for any hint!!

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2 Answers 2

Your simplest option is to use a switch/router with NAT capability to present one IP address to the outside world, while allowing you to use as many machines as you like.

Such devices are very low cost.

Useful entry level Wikipedia article on NAT here

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Hi, thanks for the answer. I will have this as plan B then. Best case would be I can use the router and/or Ubuntu machine I already have in the household. So I should look for NAT options in my router? –  dmeu Mar 3 '13 at 13:20
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Go to settings -> network. Select wireless. And press the button "use as hotspot". Write down the connection key and let your devices connect.

More info about sharing your connection:

Internet/connectionSharing

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Thanks, but in my experience, this has led to problems because either some Android devices could not connect or (this one I am not sure) the connected devices get assigned a new IP. –  dmeu Mar 3 '13 at 13:18
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