Sorry... My bad. There was an HTTrack based scraper hitting the SO feeds a few million times a day that I was trying to block, and it looks like I accidentally banned all of TE Data.
This should be fixed now. Sorry for the disruption.
Interesting side note: We average about 9 requests per second from Egypt for SE/SO. You can also see the spikes from the scraper (only partial logs until auto rate limiter kicked in):