Several popular websites and services are down right now for many users. The affected sites include Twitter, SoundCloud, Spotify, and PayPal among others. The cause appears to be a sweeping outage of DNS provider Dyn -- which in turn is under DDoS attack, according to an official blog post. From a TechCrunch report:Last month, Bruce Schneier warned that someone was learning how to take down the internet by: Dyn says that it has resolved the issue and sites should function normally.by: Department of Homeland Security says it is aware of the first DDoS attack on Dyn today and "investigating all potential causes." Dyn says it is still under DDoS attack. News outlet The Next Web says it is also facing issues. Any website that uses Dyn's service -- directly or indirectly -- is facing the issue. Motherboard has more details by: It seems even PlayStation Network is also hit. EA Sports Games said it is aware of the issues in live-play. Dyn says it is facing a second round of DDoS attacks.by: U.S. government probing whether east coast internet attack was a 'criminal act' - official.Editor's note: the story is being updated as we learn more. The front page was updated to move this story up. Are you also facing issues? Share your experience in the comments section below.