If you are using network solutions for your DNS servers, they have been under an attack for most of the day today, if you are effected by this outage, please use our name servers rather then Network Solutions to avoid issues. You can submit a ticket if you need help with this as well.
Edit - update from NS 1:47 PM PT
The recent DDOS attack affecting some customers has now been mitigated. Customer websites should be resolving normally, and you should be able to readily access the Network Solutions site. If you continue to have issues, please contact our Customer Service team at 1-866-391-4357. Thanks to everyone for their patience as we resolved this issue.
Thank you