Cannot get lan to work


I have read through the forums here scouring for information ,playing on steam on windows 10 , using provider supplied modem/router ,checked the network setting in the docs to be set at 1400 , checked upnp within the router is on , provided exceptions for the port forwarding and disabled firewall and played on private network too

Nothing works as yet,

Tried hosting on both machines and yes both patched and both running expansion. using both wifi and cabled and the closest we get is on private network i can see the game but not join .

Any help would be greatly appreciated im all out of ideas