Quote Originally Posted by KisaiTenshi View Post
http://na.finalfantasyxiv.com/lodest...06/blog/77559/
UDP
55296-55551
TCP
80, 8080, 443, 55296-55551

To clarify, this is what SE says, but this isn't what's being used.
That's not an official post, that's someones personal blog and it's VERY bad advice to do that they've said as they're saying to open nearly 300 ports to your computer that potentially may cause security issues if you have other services running on those ports.

FFXIV does not need any ports opened OR UPnP enabled (I know because I've connected from 2 locations, neither have UPnP or ports forwarded to the computer). If you find an official SE page saying you need to open ports so then please post a link, but I've never seen any such thing and from my own experience it isn't needed, as well as that fact the game isn't a server so nothing should be connecting to the local computers.

The FFXIV game is a client, it is creating all the connections to the SE server at which point the server can reply on those connections that the client created. Yes the router has to work out the NAT and reply to the correct internal computer, but since the connection is still open, that's easy. If your computer is unable to access SE servers on those ports that's an outgoing problem, not an incoming one. Incoming traffic needs ports to be opened, outgoing traffic needs unblocking on the router/firewall (or NAT adding) to allow it to work.