In a nutshell, there are 3 entries in the Windows Advanced Firewall, inbound rules that the SharePort installation sets up.  Two entries are called: 'SharePort Utility' and the third is called: SXUPTP
The installation only enabled the 'public' profile for these 3 inbound rules.  I had to also enable the 'private' profile for these 3 inbound rules.  This should probably be fixed in the installation software itself.
(see below for more detailed instructions)
If it works for you, post a reply on this board.
Best,
Gino. 

Windows firewall -> advanced settings
   Inbound rules
       SharePort Utility
          Properties->Advanced
             Profiles:
                make sure the following profiles are checked:
                  Private
                  Public
       SharePort Utility
          Properties->Advanced
             Profiles:
                make sure the following profiles are checked:
                  Private
                  Public
       SXUPTP
          Properties->Advanced
             Profiles:
                make sure the following profiles are checked:
                  Private
                  Public