silversurfer
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- Aug 17, 2014
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Encrypted email service, Tutanota has experienced a series of DDoS attacks this week, first targeting the Tutanota website and further its DNS providers.
This had caused downtime for several hours for millions of Tutanota users.
The outage was further exacerbated by the fact that different DNS servers continued to cache the incorrect entries for the domain.
Tutanota is a German provider of end-to-end encrypted email service with over 2 million users. The company is frequently cited alongside popular encrypted email providers like ProtonMail.
DDoS attacks directly targeting Tutanota surfaced on the weekend before September 14th.
This incident caused issues for a few hundred users, but was remedied shortly by restricting an "overreacting IP-block" responsible for the attack.
"This weekend continuous DDoS attacks and an infrastructure issue led to [downtimes] for hundreds of users. While we were able to mitigate most of the DDoS, an overreacting IP-block to fight the attacks led to hundreds of users not being able to access Tutanota for multiple hours this Sunday," stated Tutanota in a blog post.