On Friday, December 2, this site, along with JessicaDPearson.com and SmsuPolitics.com were all down for a while. These are all hosted on my same server. But the downtime was not caused by problems with my web server. It was caused by problems with the company that hosts my domain name server.
My DNS server is hosted through EveryDNS.net. On Friday a massive Denial Of Service attack was launched against their servers. A sister site of EveryDNS, OpenDNS.com also went down. On their blog, OpenDNS explained the situation and said it was resolving the DoS attack.
They also said that the DoS attack is still happening, but they have found ways to better cope with the situation. Hopefully, the attack subsides and all the websites that rely on their services will continue to function.
I will say that EveryDNS is one of the best sites available to use as a DNS Server. They are free (as in they accept donations) and you can use them as a primary or secondary DNS. Anyway, things are working properly right now, and hopefully they will be able to completely stop those people who perpetrated the attack.