Check 1
Caching and TTLs behave as expected.
Measured live, recorded in your GameDay report.
⚠ Scenario: DNS failure
DNS failure simulation
It is always DNS. This scenario breaks resolution for chosen names on your own hosts so you can find out how bad it gets.
What happens
Lookups for chosen names fail or time out.
Cached records expire.
Services must cope without resolution.
What it proves
Check 2
Services degrade instead of crashing.
Measured live, recorded in your GameDay report.
Check 3
Alerts point at DNS, not everything else.
Measured live, recorded in your GameDay report.
Questions
+ Does this affect public DNS?
No. Resolution is broken only on your verified hosts, for the duration you set.
Safe by design
Runs only against infrastructure you have verified you own, with a blast-radius limit, a hard time limit and an abort button. Never against third parties.