I just realised I never got back to you. You may need to forward a port. D-Link modem/routers don't use UPnP. The steps are: 1. Set up a static ip. 2. Forward port 6346 for each of TCP & UDP (separate port forwards). Then save & reboot the modem. 3. Within LW: Manual port forward instructions & sample image & 2 posts after that.

1. A guide for setting up a static ip for OSX: http://www.sonic.net/support/ss/mac/osx_staticip/ but don't add the domain addresses they show!

2. I don't have mac instructions for your particular model. Mine are here: Mac instructions for DI-Link 504g which 'might' be similar; or as another guide, PC instructions here: port forwarding Dlink 302Gv2 for pc

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