Ok I think I'm on the right track with this.
I can connect to hubs but search and file lists do not work on any DC clients
It appears that port forwarding is my next step but I am on campus, and not really sure how to go about this, or if there is another way around it.
I did used to be able to do whatever I wanted on DC here (with auto connection settings) but since updating to DC0.802 it hasn't worked for me. And I mean the same day - working, updated, not working. Since then I've tried other clients and tried reinstalling the older model but nothing did the trick. So that's where I'm at :)