I have followed Luis Alvarado's post on Sharing Connection to other PCs (Via Wired Ethernet) up until the "Client PC" part and am now sharing my laptop's internet connection with my Desktop server with an ethernet cable.
However, only my laptop can see the server (at 10.42.0.50), no other machi...
If not, we have to make sure the settings on the laptop are correct and the connection is being shared, that's the likeliest problem since you changed them when my 1st answer did not specify that I meant the server