Users of popular cryptocurrency exchange Bitfinex couldn’t reach the site for a while. The company just announced on their Twitter account that they are currently under a heavy DDOS attack.
Platform is currently under heavy DDOS, we are working to bring it back online.
— Bitfinex (@bitfinex) December 17, 2017
https://platform.twitter.com/widgets.js
Bitfinex is under attack frequently, and it gets a negative reaction from its users. Four days ago, there was a similar problem and the site was unreachable for some time.
Update: bitfinex.com looks up now, but there is no update about the situation on their Twitter account.