How do I open logical port 16384?

I use Connected Backup to store my data in the cloud and recently encountered a problem when trying to retrieve a file. The support staff walked me through the uninstall/reinstall of their software, but then could not get a connection to my computer. They told me I need to have logical ports 16384 and 16386 open for the software to work properly--but they could not tell me how to find out what the port status is or how to open or close a specific port.

After some digging, I used the Network Utility in OS version 10.7.5 to scan for open ports and discovered that 16386 is already open, but 16384 is not. How do I change the setting for port 16384? I don't have any third party firewall software running on the machine, although I believe my Verizon FIOS router has some firewall protection built into it.

Neil