Amar Jeer

Cisco Umbrella Outage History: How Often It Goes Down (2026)

June 1, 2026

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Cisco Umbrella Outage History: How Often It Goes Down (2026)

When Cisco Umbrella has an outage, DNS resolution and (in the SIG tier) HTTPS inspection break for the affected region until Cisco's data centers recover. Any cloud-proxy SSE has the same exposure: if the vendor's PoP is degraded, your security and connectivity degrade with it. The architectural alternative is to run inspection on the endpoint, where there's no remote dependency.

How Cisco Umbrella outages happen

Cisco Umbrella runs out of Cisco-operated and partner-operated data centers globally. Outages typically come from one of four causes.

Resolver failures. The DNS resolvers Cisco operates can hit capacity, networking, or BGP issues. When that happens, DNS queries time out or return failures, and users either get block pages or lose connectivity entirely depending on how the customer configured fallback.

SIG cloud proxy issues. If you're routing HTTPS traffic through the SIG cloud SWG and that PoP has a problem, traffic stalls in the proxy queue or fails outright.

Routing and peering events. BGP route changes, internet routing instability, or peering disputes can degrade access to Umbrella's data centers even when Cisco's infrastructure itself is healthy.

Regional disruptions. Power events, fiber cuts, or DDoS attacks against the upstream network connecting Umbrella's PoPs.

What the outage does to your security posture

Depending on your fallback configuration, an Umbrella outage results in one of three states.

Fail-open. DNS resolution falls back to a public resolver. Your users get internet access but lose Umbrella's policy enforcement. You're effectively unprotected for the duration of the outage.

Fail-closed. DNS resolution stops. Your users can't reach anything. Policy is preserved but productivity stops.

Partial degradation. Some categories or features fail, others don't. Hardest to diagnose, hardest to remediate.

Why on-device architecture doesn't have this problem

dope.SWG runs the SWG agent on the endpoint. There's no remote PoP to depend on. SSL inspection, URL filtering, anti-malware, and Cloud Application Control all run locally. Policies are cached on the device, so if the dope.console is unreachable, the most recently pushed policy continues to enforce. There is no fail-open or fail-closed dilemma because there is no centralized choke point in the data plane.

This is one of the practical reasons customers move off cloud-proxy SSE: Greylock Partners replaced Cisco Umbrella in 27 days. A separate VC firm migrated 2,000 machines off Cisco Umbrella in two days. The City of Visalia extended on-device enforcement to 700+ public-sector users. None of them have a centralized PoP to lose.

FAQ: Cisco Umbrella outages

Where can I check Cisco Umbrella status?

Cisco publishes a status page at status.umbrella.com. It's the official source of truth for Umbrella service health.

How often does Cisco Umbrella go down?

Cisco doesn't publish formal MTBF numbers, but the status page history shows multiple incidents per year across DNS resolution, dashboard, and SIG components. Most are regional and minutes to hours long.

What happens if Cisco Umbrella has an outage?

DNS resolution and (in SIG) HTTPS inspection break for affected users. Depending on your fallback config, you either lose internet (fail-closed) or lose protection (fail-open).

How do I prevent Cisco Umbrella outages from affecting my users?

Best practice: configure secondary DNS resolvers, monitor status.umbrella.com, and have a documented failover process. Architecturally, the only way to remove the exposure is to remove the remote-PoP dependency, which means moving inspection to the endpoint.

Does on-device SWG have outages?

The agent itself can have issues, but there's no centralized PoP to fail. If the cloud console is unreachable, the agent continues to enforce the last-pushed policy locally.