(solved)
I installed sqlserver 2014 express (advanced 64bit) on PC_A
I'm trying to access it from my laptop (connected via wifi).
I can, if I turn off the the firewall of PC_A.
So I added an inbound rule on the (>PC_A) firewall for port 1433 (all the IP's on PC_A are set to 1433) for the public profile.
... and it won't let me in.
What am I missing?
I also allowed udp port 1434.
If things have the tendency to go your way, do not worry. It won't last. Jules Renard.