Howto share your internet connection in Ubuntu.

Since Ubuntu 9.10 Karmic Koala, Ubuntu has an inbuilt way of sharing any connection. There are a couple usage scenarios for this:-

  1. You want to share your mobile broadband connection with other computers on the network
  2. You want to use your Ubuntu machine to extend your network wirelessly e.g. Your laptop is connected to the network via it’s wireless adapter, which is then connected to another machine via a CAT 5 or CAT 6 cable, enabling the other machine to connect to the network and internet.

I wouldn’t envisage using this to share a DSL broadband connection since most people will already be using an ISP supplied router to do this.

Using it is as simple as enabling the method “Shared to other computers” in the network connection in network manager.

This turns your machine into a mini DHCP/DNS server and starts handing out IP addresses in a 10.x.x.x address range. The machine then NAT/routes any traffic coming in on that interface and forwards it to the networks real gateway. I’ve used it a few times now and it works well.


8 thoughts on “Howto share your internet connection in Ubuntu.”

    1. Hi,

      This article was written some time ago, when Hardy was in vogue, so it is out of date. I will endeavor to update it and the other articles as soon as I can.

      Thanks for taking the time to comment.



    1. I dunno Gab. Apart from perhaps being 64 bit and using the Sun jre I can’t see why it’s working for me and not for you, although I did update to the latest version of WordPress this AM. If it was just the one time maybe we should just put it down to experience?

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