This tutorial explains how you can turn of the Windows Firewall on Windows Server 2012 R2
Step 1:On a task bar, locate a computer icon and right click it. Scroll to Open Network and Sharing Center and click it.
Step 2: Click Windows Firewall
Step 3: Click Turn Windows Firewall on or off
Step 4: Choose Turn off Windows Firewall from Domain network settings, Private network settings and Public network settings and click OK to finish turning off firewall
How to Turn Off Firewall on Windows Server 2012 R2