Given that much detail your average tech would wait for more details.
Hi, today I faced a problem that was funny.
My ISP's default DNS is 126.96.36.199, 188.8.131.52 (OpenDNS public DNS IPs). Few days back I was able to changed the DNS to something else, like 184.108.40.206 (Google's public DNS), but right now when I try to change it, it disconnects my Internet. The interesting part is that I can still ping 220.127.116.11 with no problem.
Appreciate your help.