In Ubuntu 16.04 and 16.10 it worked sharing my wifi through ethernet. In network manager and changed the IPv4 Settings tab, Method: "Shared to other computers" After upgrading to 17.04 it stopped working, so did a clean install, but still not able to share. My ethernet (wired) connection just turns itself off. Anyone have a solution?
In Ubuntu 17.04, the dnsmasq-tools dependency has been dropped from network-manager, which results in the network sharing feature failing to work. To fix this, simply install the dnsmasq-base package.
Open Terminal and run:
sudo apt-get install dnsmasq-base
This will fix the problem. Information about the bug can be found here...