You may suffer some port issues if you're running Acquisition also. Set them both to run from different ports. One for port 6346 & the other for another higher port number like 64049. OH ... sorry I see you've set the port number already for port 37373. I don't quite understand the UPnP settings. Sounds to me like the port mapping is actually port forwarding which is not UPnP. I"m confused there. Do you have a static ip?

BTW for OSX you don't really need a firewall. But be sure it's properly configured. I don't know about that brand Firewall configuration instructions (click on link)

BTW I edited out your personal internal ip address for security reasons. Not that people would be able to access you anyway via ...