We are having issues with VPN users connecting to a file share in our datacenter. I'm pretty confident my firewall isn't preventing access, but to prove to the server team I'd like to do some pen testing through the firewall and into the file share. Do I point the nmap to the domain controllers, EMC storage device, firewall, ?? I'm a novice at pen testing so please bare with me. Also, using Zenmap how do I scan specific ports?