DNS problems are often indirect
When DNS is wrong, users rarely report “DNS is broken”. They report that an application is slow, a login fails, a service cannot be reached or a system behaves inconsistently. That is why DNS audits are useful: they find hidden inconsistencies before they become visible incidents.
What I look for in a DNS audit
- A records that exist but no longer resolve to active systems.
- Missing PTR records that affect reverse lookups.
- Duplicate names or duplicate IP assignments.
- Stale records left after migrations, rebuilds or decommissioning.
- Forward and reverse lookup mismatches.
Operational value: a DNS audit is not just cleanup. It reduces uncertainty when troubleshooting identity, connectivity and application behaviour.
Why this matters for small businesses
Small environments often grow organically. Systems are renamed, replaced, moved to cloud services or retired. Without periodic review, DNS can become a quiet source of confusion.
Good output is practical output
A useful audit should not produce a vague list of records. It should classify findings, highlight likely risk, and recommend specific next actions: verify, update, remove or monitor.