Cisco Duo Outage History

Cisco Duo experienced SMS delivery failures affecting all customers in the US region due to carrier issues, preventing users from receiving SMS passcodes for authentication. The incident impacted SMS message delivery while other authentication methods like Duo Push remained functional. The SMS delivery issue was resolved after 2.7 hours of working with service providers to restore normal functionality.

Cisco Duo experienced VoIP phone call authentication failures across all US region deployments for 4.2 hours. Users were unable to authenticate via phone calls but could use alternative methods like Duo Mobile Push and SMS passcodes. The issue was resolved and VoIP authentication returned to normal operation with sustained success rates.

Cisco Duo experienced VOIP authentication failures affecting all US region deployments for 3.3 hours. Users were unable to authenticate via phone calls and were advised to use alternative methods like Duo Mobile Push or SMS passcodes. The service was restored to normal operation with sustained success rates observed.

A major power and connectivity outage at a third-party data center in the UAE caused a 39-hour service outage affecting Cisco Duo's DUO81 deployment, resulting in elevated error rates and connectivity issues for users in the region. Due to persistent infrastructure instability, Cisco initiated its Disaster Recovery process to migrate affected customers and critical services away from the UAE region. The outage was resolved by successfully migrating all impacted customers to an alternative Duo deployment, restoring full service functionality.

Cisco Duo experienced service degradation on the DUO81 deployment for 3.2 hours due to a regional outage. The incident was resolved by rerouting traffic to restore normal service performance.

Cisco Duo experienced 504 Gateway timeout errors for 2.9 hours when users attempted to access Microsoft Entra and Duo was called for multi-factor authentication. The issue affected the Core Authentication Service across all deployments, preventing users from completing their login process. The problem was resolved after Cisco deployed a fix and confirmed successful authentications were resuming.

Cisco Duo experienced phone call authentication failures in the US region for 4.4 hours, causing an abnormally low success rate for users attempting to authenticate via phone calls. The issue was traced to a third-party carrier problem rather than Duo's internal systems. The incident was resolved when the third-party carrier fixed their service.