Outage in IONOS Cloud
Network packet loss
Resolved MinorIncident Report
Summary AI Generated
IONOS Cloud experienced network packet loss and connection delays caused by a DDoS attack on customer infrastructure, affecting individual virtual resources with degraded connection quality. The incident lasted approximately 100 hours while network technicians worked to isolate and resolve the issue. The problem was resolved after implementing countermeasures to mitigate the attack, though intermittent link saturation caused some packet loss during the response period.
We are writing to inform you that we have been experiencing sporadic connection issues and substantial delays on packet delivery.
Network technicians have started working on the occurrence immediately after detection and will isolate the problem and solve the issue as quick as possible. However, it is possible that there will be a certain degradation in connection quality affecting individual virtual resources.
We will inform you as soon as the functionality has been restored.
Components affected
IONOS Cloud NetworkTrusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
RESOLVED
19 days ago - at 05/19/2026 04:17PM
We are marking this incident as resolved.
The Root Cause of the incident was a DDOS attack on customers hosted in our infrastructure. While the attack was largely successfully mitigated by our countermeasures a intermittent saturation of an affected link resulted in an increase of package loss.
Our network team has evaluated the countermeasures' effectiveness and the identified bottleneck and is currently working on technical and organizational improvements to further decrease detection time for comparable events.
MONITORING
23 days ago - at 05/15/2026 01:18PM
A fix has been implemented and we are monitoring the results.
INVESTIGATING
23 days ago - at 05/15/2026 11:59AM
We are writing to inform you that we have been experiencing sporadic connection issues and substantial delays on packet delivery.
Network technicians have started working on the occurrence immediately after detection and will isolate the problem and solve the issue as quick as possible. However, it is possible that there will be a certain degradation in connection quality affecting individual virtual resources.
We will inform you as soon as the functionality has been restored.
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