Helient Systems :

Reported by: William Fulmer, Chief Engineering Officer

Overnight a large denial of service (DDoS) attack affected Dyn, a major DNS host.  Level3  is also adversely affected.

Remote access for some clients has been affected and this attack is believed to be the root cause.  As of this morning the situation has not been fully resolved.  If your network or remote access has been affected, and you need assistance, please contact us at service@helient.com

Dyn posted this update on its website: “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. Updates will be posted as information becomes available.”