Twitter, Reddit, Spotify, PSN, XBox, Netflix, Github, PayPal and bunch of other websites were offline earlier today. That’s because someone conducted a massive distributed denial of service (DDoS) attack on the Dyn DNS, a world renowned Domain Name Servers (DNS) service provider. You can read the most recent status messages at DynDNS. So far there have been two rounds of attacks today. If you’re in US Central Time, the first attack started around 7am and the second attack was around noon.
As of this writing, nobody has taken responsibility for the attacks. If you remember, earlier this month the source code for the Mirai IoT botnet was leaked and has caused a few major DDoS attacks around the world.
UPDATE: Is also appears that Level3 Communications is experiencing major outages today as well.
The current Level3 outage map at DownDetector looks like this:
If you’re still experiencing DNS issues, you can try switching to OpenDNS. OpenDNS is a DNS resolver that caches records beyond their TTL if the upstream DNS server cannot be found. In cases like today’s major outage it can be handy to swap your DNS settings out for this, or it may be worth using as a standard default. Resolution may be a bit slow as it will try to see if the upstream server cannot be found, but it at least can get you back to a working state.