- an expired zone on an authoritative secondary
- a DNSSEC validation failure
- other failures to resolve a domain name (e.g. broken delegations)
None of these indicate a "server" issue, as such. They are all protocol issues.
- an expired zone on an authoritative secondary
- a DNSSEC validation failure
- other failures to resolve a domain name (e.g. broken delegations)
None of these indicate a "server" issue, as such. They are all protocol issues.