I'm confused. I'm pretty sure it's because of maintenance going on right now.
Maintenance is over, unless they turned the servers on by accident(see Server status page). My server isn't letting anyone in, we're all getting 10102.
If maintenance is still going on, they need to announce an extension cause it supposedly ended 30 minutes ago and correct the server status page.
FFXI character: Elathia ::F Tarutaru::87SCH/75RDM/70WHM/54BLM::Cerberus/Ragnarok/Bahamut::1/23/2004 - 3/25/2015 :: Retired
RDM First 75 Job :: RDM Maat victory: March 28, 2008 (1/3) :: San d'Oria R10 Long live King Destin :: Praise be to the late King Ranperre. FFXIV character: Selene Silverstorm :: F Lalafell :: WAR60/WHM60/BLM60 :: Ragnarok :: 9/2013 -
Patch note archives for FFXIV: http://na.finalfantasyxiv.com/lodestone/special/patchnote_log/