Expose IIS or IISExpress running in a Parallels Windows 10 VM to your OS X host

Add an ACL rule

Open CMD or Powershell as administrator. Add a URL ACL entry for your new name on the port of your choice, e.g.
netsh http add urlacl url=http://windows.local:8080/ user=everyone

Note: windows.local:8080 can be substituted with the name and port of your choice

Add a firewall rule

Open CMD or Powershell as administrator. Add an inbound firewall rule for this new port.