01:25 UTC | 18:25 PT
Performance issues with PODs 5, 6 and 9 have now been resolved.
01:11 UTC | 18:11 PT
We have identified performance issues on Pod 5, 6 and 9. We are investigating.
This incident was caused by a DDoS attack on a Zendesk IP, resulting in excessive session counts on the firewalls. This led to resource exhaustion, packet loss, and network instability. To resolve the incident we implemented our standard DDoS mitigation, which brought traffic back to normal.
FOR MORE INFORMATION
For current system status information about your Zendesk, check out our system status page. During an incident, you can also receive status updates by following @ZendeskOps on Twitter. The summary of our post-mortem investigation is usually posted here a few days after the incident has ended. If you have additional questions about this incident, please log a ticket with us.