Open directory doesn't work
I want to use open directory on my university lab network. The server (10.8) is not in the same room as the clients (also 10.8). Each computer (server and clients) have their own external FQDN's and associated IP addresses. I turned on Open Directory using server.app on my sever. I then go to a client and do: system preferences>users and groups>login options>Network account server: Join>open directory utility. From there I do File>connect. When I type in the FQDN of the server, along with an admin account name and password, I get the following message:
Can't connect to server
Directory Services may not be installed on the remote server, they may be turned off, or the URL may have been entered incorrectly
None of this is true, unless "Directory Services" means something other than Open Directory. So what am I missing here?
Also, I notice that when, on the server, I select Open Directory in server.app, the on-off slide icon slides on as it appears (as it if was off until I selected Open Directory). This behavior doesn't happen with any other service on server.app.
Any ideas?