That's pretty much it. If I connect to the Internet on wlan0, how can I share this connection with a device plugged into my wired Ethernet port eth0?
Ubuntu – Share Wireless connection with Wired Ethernet Port
wireless
Related Solutions
On the server computer:
On the computer, which is connected to the Internet, click the network icon in the panel and go to "Edit Connections..." at the bottom of the menu.
Double click your Wired Connection (Leave your wireless connection untouched, the one connected to Internet and the one you want to share, as I understand).
On the "IPv4 Settings tab", select Method: "Shared to other computers"
Reconnect by clicking on the Wired Network, so it gets a new IP address. (The two computers must be connected by an ethernet cable for this step, so connect them now if you haven't already.)
Click on "Connection Information" in the network menu and write down the IP address and network mask (in my case it was assigned 10.42.0.1/255.255.255.0 but I do not know if that will always be the case).
On the client computer:
Go to "Edit Connections..." and assign a "Manual" Method. Assign an IP address on the same subnetwork (10.42.0.69 for example) and put the IP and network mask you wrote down in "Netmask" "Gateway" and "DNS servers"
Reconnect to the network to let the new settings be assigned.
Pat yourself on your back and surf away!!!
Best Answer
I had a MacMini running Ubuntu 9.10 using the Wireless connection for internet. Then I connected my Xbox360 into the MacMini's ethernet port in order to use Xbox Live.
It's ridiculously easy. Simply right click on your network manager and choose "Edit Connections". Then in the "Wired" tab, you can either use your existing wired connection, (or create a new one by hitting the "Add" button, name your new connection "Shared Network Port" or something similar), pop into its IPv4 tab and in "Method", choose "Shared to other computers". Apply everything and close the network manager windows.
Now when you need to plug something into that ethernet port, you can share your WIFI internet conenction simply by clicking on network manager and choosing the "Shared Network Port" entry there.
If you want this to be a constantly used ethernet connection used for sharing and nothing else, feel free to edit "Auto Eth0" instead of creating a new entry like I describe above. Creating a new entry gives you some flexibility to choose however.
Note that this uses a bit of NAT (network address translation) magic to work properly, so the Xbox360 (or whatever you plug into your wired port) will get a funky IP address.
From memory, it will only be able to see the internet too - I don't think you can see the host computer, the one with the internet connection. You can set that up, but it requires a bit of messing about with DHCP servers, I believe. I didn't need it, so I didn't go down that road.