You should not have issues with ports then. I do know that the FFXIV update client is very poorly made. You may be better off downloading it using uTorrent or some other bittorrent program. If you need to know how to do this I can try to search for the walkthrough I usually use. When using uTorrent my download speed goes to almost 300-500kb/sec rather than 20-30 from the update client.