Nothing special is needed, if I connect the device before logging into View I just have to click Connect Device at the top, but if I plug it in after I'm in View it will automatically connect.
Here are the ports: http://pubs.vmware.com/view-50/index.jsp?topic=/com.vmware.view.security.doc/GUID-A0B8412C-6C42-4C78-90B2-C1B2A2237AD1.html
Here are the ones I have opened for external users:
tcp/udp 4172
tcp/udp 50002
tcp 3389
tcp 4001
tcp 902
tcp 9247
tcp 80
tcp 443