I've tried to setup a Moodle 2 hub following the instructions on http://docs.moodle.org/20/en/Hub_administration however it fails on my test system. You can't register any servers with the hub server.
Can somebody help?
I've turned off the firewalls, installed on different machines to no avail. However, all the machine are on the same subnet as the hub server - is it the case that the servers need to be on different subnets for this to work?