Cisco Umbrella
Security
Resolving…
Cisco Umbrella – Akamai Domain Access Issues
MonitoringWe have implemented a partial workaround for the currently identified affected domains. Customers should begin seeing restored access to these domains. The underlying issue has not been fully resolved, and other Akamai-hosted domains may continue to return SERVFAIL responses. We are monitoring the effectiveness of this mitigation and continuing to work with Akamai toward a full resolution. Cust...
Location:
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Started:
2026-10-02 20:15 UTC
(2d ago)
Updated:
2026-10-02 23:02 UTC
(2d ago)
Resolved:
N/A
2026-10-02 22:23 UTC
(2d ago)
:
We have identified that the issue occurs with domains hosted on Akamai IPv6 name servers that return a DNS response that is larger than 1410 bytes. These responses are being truncated which causes a Servfail response from the Cisco resolvers. We are continuing to work with Akamai to resolve this issue, we have the following proposed workaround. Work Around You can bypass the impacted domains fr...
2026-10-02 20:15 UTC
(2d ago)
:
Customers using Cisco Umbrella might be unable to access some Akamai-hosted domains due to DNSSEC validation failure.Our teams are investigating and working to restore access. We will provide updates as more information becomes available.
