Maybe I can ask this differently...
Does anyone who still uses C2 still have their preview on LAN working for other mobile devices on their home network that are trying to reach the 196.158.x.x IP address when previewing on LAN?
-Still Curious
Yes I still use C2 all the time and the preview works perfectly fine for me, I specifically still use c2 for testing even though Im developing on C3 because the preview on mobiles works better on C2 as I can preview at full screen but you cannot do that in C3 as I have to export every time I need to preview on mobile. So definitely it's been working as Im using it all the time.
One thing you could check is that sometimes the IP provider changes the IP so you need to update manually in C2.
Go to File >>>> Preferences >>>> Preview
1-check if the IP that C2 has is the same as the current internet IP
2-If the IP is not the same then click that grey button next to the IP box and it will show you all the available IPs so choose the one that matches your internet IP.
If your change the IP on C2 then to preview you will need to use that new IP:
"http://New IP:50000"
If the IP is not the issue then I have no clue as it must be something else.
Update:
Also, I forgot to mention that to Preview on mobile you need to open the capx in "Administrator" mode