Outage in Cisco Umbrella

Tunnel-based Connectivity Degraded in few Data Centers.

Resolved Minor
December 10, 2025 - Started 9 days ago - Lasted about 4 hours
Official incident page

Incident Report

We are investigating an issue affecting tunnel connectivity for few Data Centers listed below: Singapore Atlanta Tokyo Paris Denver Ashburn New York Dallas Mexico City Chicago Madrid London Stockholm Customers may experience dropped or blackholed traffic, or see tunnels appear as down in dashboards. Our team is working to restore full connectivity as quickly as possible.

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Latest Updates ( sorted recent to last )
RESOLVED 9 days ago - at 12/10/2025 03:39PM

An issue was identified and resolved by our engineering team as of 15:30 UTC today.
All services are now operating normally.

We apologize for any inconvenience caused and thank you for your patience.

IDENTIFIED 9 days ago - at 12/10/2025 02:33PM

We have identified that a small number of servers have been impacted by the ongoing tunnel connectivity issue, while the majority of servers continue to operate normally. Our engineering team has initiated the mitigation process to fully resolve the issue.


We will provide another update once the mitigation process is complete. Thank you for your continued patience as we work to restore full service.

INVESTIGATING 9 days ago - at 12/10/2025 01:10PM

We are investigating an issue affecting tunnel connectivity.We will provide further updates as more information becomes available.

INVESTIGATING 9 days ago - at 12/10/2025 11:32AM

We are continuing to investigate this issue.

INVESTIGATING 9 days ago - at 12/10/2025 11:19AM

We are investigating an issue affecting tunnel connectivity for few Data Centers listed below:
Singapore
Atlanta
Tokyo
Paris
Denver
Ashburn
New York
Dallas
Mexico City
Chicago
Madrid
London
Stockholm
Customers may experience dropped or blackholed traffic, or see tunnels appear as down in dashboards. Our team is working to restore full connectivity as quickly as possible.

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