Direct answer
A complete failure should be separated into power or eligibility, the external path, and the component itself before any reset. For home-network DNS resolution, first query the same hostname from two devices and a reputable alternate resolver.
What this covers
- home-network DNS resolution with this exact failure state
- Diagnosis across site/provider outage versus resolver, filter, VPN and cache
- Customer-accessible observation, settings and external components
What it does not cover
- ×A displayed manufacturer error code with a different documented meaning
- ×Live electrical, sealed-system, internal battery-cell or gas repair
- ×A claim that every model exposes identical controls
Capture the exact failure state
ReversibleRecord whether the feature is absent, disabled, powered but unresponsive, or showing a message. Expected behavior: translate public hostnames consistently over IPv4 and IPv6.
Isolate the component boundary
ReversibleQuery the same hostname from two devices and a reputable alternate resolver. Test the simplest supported configuration with unrelated accessories and optional services removed. Boundary to separate: site/provider outage versus resolver, filter, VPN and cache.
Correct only the proven cause
ReversibleCorrect the failed resolver/filter or restart the router/client cache. Restore only the failed prerequisite or path; do not change working layers.
Verify and stop safely
ReversibleRepeat from a cold start and complete one normal use. Do not bypass managed security DNS without administrator approval.
Evidence ledger
Sources behind this answer
Visible sources support the visible claims. Home Product Support records the publisher, the fact used and the review date; community reports can suggest an issue but do not become a published fact on their own.
Exact questions
Common follow-ups
What should I check first when home-network DNS resolution has this problem?+
Query the same hostname from two devices and a reputable alternate resolver.
Why not factory-reset immediately?+
The useful boundary is site/provider outage versus resolver, filter, VPN and cache. A reset can erase state without proving which side failed.
When should I stop troubleshooting?+
do not bypass managed security DNS without administrator approval.
Answer for the exact device and software version shown above.