On 3/1/25 7:03 AM, Patrick Dupre via users wrote:
I have 2 PC A and B.
Before A what connected to the world wireless
and PC B was connected through an internet cable (wired).
PC A lost its wireless connection.
Now PC B is connected to the world through a telephone and I want to
have PC A connected also through the same internet cable and access to the 
world.

On PC A I activated Automatic DHCP
and on PC B and the internet card 10.42.0.1 shared to other computers (IP)
It connects
inet 10.42.0.1  netmask 255.255.255.0  broadcast 10.42.0.255

but PC B cannot connect (connection fails)

I just tested this setup and it works with no problem.
I don't have wifi on the desktop, just two ethernet ports, but it should be the same. One ethernet port goes to "the internet" (internal network, but same). The other ethernet port I configured in the Gnome network manager as "shared to other computers". I then plugged a laptop into that ethernet port and it had internet access.
So I'm not sure where you went wrong.

For PC C to have access, you have a couple of options. You could configure the two ethernet ports on PC A as a bridge or you could again configure the second ethernet port as shared.

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