Everything has been working fine for me until this morning when I could not access everything from my school domain (anything with xyz.edu). I'm on Mac OX 10.9. The hosts file looks OK to me:
127.0.0.1 localhost 255.255.255.255 broadcasthost 54 ::1 localhost 55 fe80::1%lo0 localhost
Preferences -> DNS looks normal:
Whenever I go to website, I see the message "This webpage is not available Error code: ERR_ADDRESS_INVALID". I could join the school wifi network but I just cannot access anything under my school domain.
I can run "host website_name" and get the IP address of the site but weird enough I cannot access the site on any browsers I have (Chrome, Firefox, Safari). I've also tried "sudo dscacheutil -flushcache" but nothing changed.
I'm really clueless how to fix this. Can someone please help?