Hi, it's been a month since I came back to the game since last year, and it has been a very frustrating experience so far.

Every 30 minutes (sometimes a minute or two later) I get a "Connection with the server was lost" error 90001 or 90002, most of the times I can get back into the game immediately, a few times I have to wait a minute until the character gets logged out.

Last week, after trying different things like opening ports and updating router's firmware and network port drivers, I created a support ticket on the Lodestone, had a chat with them, sent them some logs, and this morning I got this response:
We regret to inform you that we are unable to offer further troubleshooting steps for your issues with FINAL FANTASY XIV: Online.

We would advise you to report the issue in the FINAL FANTASY XIV Forum
http://forum.square-enix.com/ffxiv/forum.php

I've read some posts in this forum that it might be ISP related, I even changed my ISP (not because of the game, I just went from 20 mbps to 150 mbps, had been waiting months for the coverage to reach my area and it finally happened, so that just happened to be two weeks) but it has been the same issue with both my previous ISP and the new one.

Is there something that I can do? As I mentioned before, it is really frustrating disconnecting every 30 minutes, it doesn't let me do endgame like Deltascape or Shinryu unless I'm keeping track of the time and even sometimes I cannot even go in as DRK my main, and have to go as dps since missing a tank for a minute is worst than missing a dps. I've caused wipes like that in normal dungeons runs because I forget to look at the time and then I'm in the middle of a big pull and then I'm disconnected and when I get back the other 3 guys are already dead.