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Bugs Killed

Windows

Test domain blocked by DNS Filter

A new test domain was being blocked when trying to reach the website. The domain was added to the DNS Filter allowed list, and access should work afterward.

Killed once by someone from XL.net, on 2025-12-14.

Affects

Versions

  • Windows

Apps

  • DNS Filter

What you see

  • Trying to open the new test domain was blocked.
  • Access to the website was denied until the domain was allow-listed.

Why it happens

Likely The new test domain was blocked by DNS Filter until it was added to the allowed list.

When it shows up

A Windows computer cannot reach a newly created test domain and DNS Filter is blocking it.

You are in this case if:

  • DNS Filter is in use.
  • The domain is not yet on the allowed list.
  • The blocked site is a new test domain rather than a general internet outage.

1 fix below

The steps that killed it

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Someone from XL.net killed this on a Windows computer on 2025-12-14. It is written up from that one repair, so it cites no outside page.