The datacenter we locate our Linux servers, Singtel EXPAN, went down from around 2:10AM. Basically all EXPAN network down. Many web sites in Singapore affected, not only ours.
Will monitor and post here.
Update at 5:22am: 3 hours and still counting. This must be something screwed up big time in Singtel. All servers housed in EXPAN are not accessable.
Update at 5:45am: it's up now. Waiting for explanation from EXPAN.
