had same [30410][30607][20457][409] issue
I tried everything that's available on the forum. tried VPN, boot file change , replacing updated boot file but none of them worked but i got it fixed by following one of the Japanese forum reviews

http://na.finalfantasyxiv.com/lodest.../blog/2621178/

if you are on PC using Chrome as default, go to control panel > Network and Internet > connections > Lan settings > tick the proxy server and press ok twice that made it work for me :'D reinstalling the game is pain in the ass :'D good luck everyone