Network Solutions down

Got up early in the morning, then checked my company emails on the iPhone and got connection error, it's around 6:15 AM. Didn't get any Nagios notification emails about the mail server problem. Open the laptop and can't SSH to the mail server and Nagios server either, that's weird. nslookup them, could not resolve IPs! Login into the Network Solutions which hosts our domain names, it was hanging forever, seems to be down. Got back to SSH to servers via IP addresses, they worked. That's why the Nagios was still working well. So checked around other name servers, some still cached while other not.

Went to the office at 8 and found just mail works with one of our Comcast DNS server, 75.75.76.76, other hosts came up lately. The http://networksolutions.com was completely down. It just came back up around 10:30. Some DNS servers like Comcast 75.75.75.75, Google 8.8.8.8, 8.8.4.4 still can't query our hosts.

Find out solution for this issue in the future. We'll definitely need secondary name servers from other providers!

Here is additional information about the Network Solutions's problem:
http://blogs.cisco.com/security/network-solutions-customer-site-compromises-and-ddos/
http://blogs.cisco.com/security/hijacking-of-dns-records-from-network-solutions/