A major denial of service attack occurred this morning against a major U.S. DNS provider, DynDNS, temporarily bringing down websites like Twitter and Reddit.
According to Dyn, the attack began at 7:10 EST, and it took until 9:45 for services to return to normal.
A distributed denial of service (DDoS) attack is when a group of people send millions of requests into a server, essentially clogging up the piping and preventing legitmate requests from getting through. You don’t need to be a 400-pound hacker to conduct a DDoS attack, as all it takes is an easy-to-use program .
DNS providers are extremely important to the web as they translate IP addresses into URLs. Many major websites use Dyn for this service.
Woah, what's happening with the Internet today? Look at this map from Level3 pic.twitter.com/VC8n7iY73E
— Alex Fitzpatrick (@AlexJamesFitz) October 21, 2016
Dyn put out a statement on the attack.
Starting at 11:10 UTC on October 21th-Friday 2016 we began monitoring and mitigating a DDoS attack against our Dyn Managed DNS infrastructure. Some customers may experience increased DNS query latency and delayed zone propagation during this time.
This attack is mainly impacting US East and is impacting Managed DNS customer in this region. Our Engineers are continuing to work on mitigating this issue.