Support for Your Duo Security Implementation
If you experience problems or an outage, please contact Duo Security support as described at https://www.duosecurity.com/support This will be helpful for you and also for Duo.
Duo also has a handy tool to help determine if the problem is something just hitting your site, or something that's affecting everyone:http://status.duosecurity.com/
Also consider joining the InCommon mailing list specifically for InCommon Duo Security participants. See https://lists.incommon.org/sympa/subscribe/duo-users