RRSIG Lookup
Lookup RRSIG records and inspect DNSSEC signature lifetimes and signer data.
Use RRSIG Lookup in 4 Steps
What is RRSIG Lookup?
RRSIG Lookup is used to lookup dnssec signature records. This route is designed for fast operational diagnostics with clear educational context.
RRSIG records are cryptographic signatures over RRsets and prove integrity for DNSSEC-enabled zones.
During migrations or incidents, this check helps determine whether issues are caused by source configuration, resolver caching, or dependency records.
Why It Matters in DNS Operations
- Source verification: confirm live resolver output before broader rollback actions.
- Change windows: detect whether updates are visible where expected.
- Incident triage: narrow likely root-cause early with specific record evidence.
- Team alignment: share URL-state checks to avoid duplicated investigation.
- Best use: Signature-expiry diagnostics and resolver validation troubleshooting.
Quick Interpretation Table
| Observed Result | Likely Cause | Next Step |
|---|---|---|
| RRSIG missing for signed zone | Unsigned RRset path or signer issue | Trigger zone re-sign and verify signer health |
| Signature expired | Resolvers reject data | Regenerate signatures immediately |
| Covers mismatch | Invalid signature mapping | Validate signer config for target RRset |
Troubleshooting Workflow
- Run this record check first for scoped signal.
- Validate nameserver authority and SOA context if results are unexpected.
- Use propagation checks when regions return mixed outcomes.
- Re-run after fixes and compare values against expected policy.
Common Misconfiguration to Avoid
Expired signatures after signer outages or mis-scheduled re-sign operations.
Validation Path
Check inception/expiration windows and verify covered type alignment.
Data Source and Limitations
Tools provide actionable lookup output where feasible and clear guidance for deeper verification paths. For high-impact production incidents, pair with provider logs and CLI validation.