Service Interruption August 22nd 2015

SUMMARY

As of 7:30 a.m. PST, we are working to resolve the following service incident:

Access issues with our East coast data center.

[Update] As of 7:53 a.m. PST, service has been fully restored to our East coast data center.  Post-mortem to follow.

POST-MORTEM 

This incident was caused by a DDoS (Distributed Denial of Service) attack on our East Coast data centre. This impacted performance for Zendesk customers whose accounts are located in that data centre. To resolve the incident, we enabled fallback to an alternative routing service for the time until the attack subsided. Our Operations team are working on a global project to improve the way we detect and respond to DDoS attacks to minimise the impact of such incidents going forward.