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**UPDATE 22 December 12:56 CST** Our engineers have fully resolved the impact

**UPDATE 22 December 12:56 CST**

Our engineers have fully resolved the impact to our DNS infrastructure. After blocking the majority of the inbound DDoS attack earlier in the morning some DNS servers that were sending both legitimate and DDoS traffic to Rackspace were blacklisted. Further investigation and alteration of our mitigation profiles resolved the last remaining issues at 12:15CST. If you continue to experience adverse impact, please reach out to your support teams and provide trace route information for further investigations. Additional details regarding this incident will be made available upon the completion of our Root Cause Analysis.

http://status.rackspace.com***UPDATE 22 December 11:15 CST***

On December 21st, at approximately 23:54 CST, backbone engineers identified a UDP DDoS attack targeting the DNS servers in our IAD, ORD, and LON data centers. As a result of this issue, authoritative DNS resolution for any new request to the DNS servers began to fail in the affected data centers. In order to stabilize the issue, our teams placed the impacted DNS infrastructure behind mitigation services. This service is designed to protect our infrastructure, however, due to the nature of the event, a portion of legitimate traffic to our DNS infrastructure may be inadvertently blocked. Our teams are actively working to mitigate the attack and provide service stability.

Thank you for your continued patience. We will provide updates as information becomes available.

Rackspace DNS Update

We are monitoring a connectivity issue impacting our DNS environment that began at approximately 01:10 CST December 22nd. Our engineers have taken steps to mitigate impact from this issue, however some of our customers may continue to experience intermittent periods of latency, packet loss, or connectivity failures when attempting to reach

rackspace.com

or subdomains within

rackspace.com

. This may also continue to impact customer DNS resolution during this time. Our engineers are engaged and continuing work to stabilize the environment.

Thank you for your continued patience as we work to resolve this issue. If you have any further questions or concerns, please contact a member of your support team.

Updates available at our

http://status.rackspace.com

IP Address if DNS does not resolve:108.166.13.186

Mirrored at our Community Page:

http://bit.ly/1t1lY7Gupdated 09:33 CST

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