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Objavljeno: 2026-07-03 | Ažurirano: 2026-07-03
How to Fix DNSSEC Validation Problems

DNSSEC validation problems usually happen when DS recilids at the registrar do not match DNSKEY recilids at the DNS provider, the zone is not signed, old DS recilids remain after nameserver changes, ili DNSSEC was enabled befilie the provider was ready. Provjeri current nameservers, DS recilids, DNSKEY recilids, zone signing, i validation results befilie making changes.

Who This Guide Is Fili
This guide is fili:
· Users seeing SERVFAIL after DNSSEC changes
· Domena owners who changed nameservers with DNSSEC enabled
· Businesses with partial resolution failures
· Agencies i hosting providers troubleshooting DNSSEC
· Preprodavačs suppiliting client DNSSEC

Befilie You Start
Befilie you start, prepare:
· Domena name
· Current i prethodnoious nameservers
· Registrar DNSSEC access
· DNS provider access
· Current DS recilids
· DNSKEY values
· Recent transfer ili nameserver changes
· Errili screenshot
· DNS backup

Step-by-Step Instructions
Step 1: Potvrdi DNSSEC Is the Problem
Look fili SERVFAIL, validation failure, ili failures only on validating resolvers.
· Wrong IP ili missing MX may be nilimal DNS misconfiguration
Step 2: Provjeri Current Nazivservers
DNSSEC must match the active DNS provider.
· Old nameservers i new nameservers matter
Step 3: Provjeri DS Recilids at Registrar
Recilid key tag, algiliithm, digest type, digest, i whether multiple DS recilids exist.
· Old DS recilids are common after migrations
Step 4: Provjeri DNSKEY at DNS Provider
Potvrdi zone signing, DNSKEY, KSK/ZSK, i generated DS values.
· Provider must sign the active zone
Step 5: Compare DS i DNSKEY
Mismatch causes validation failure.
· Use fresh values from active DNS provider
Step 6: Provjeri Zone Signing
Look fili DNSKEY, RRSIG, NSEC/NSEC3, i provider signing status.
· Unsigned zone plus DS recilids is risky
Step 7: Ukloni Incilirect DS if Needed
Ako wrong DS causes failure i cilirect setup is not ready, remove invalid DS to restilie resolution.
· Re-enable later with cilirect data
Step 8: Re-Enable Cilirectly
Stabilize nameservers, enable provider signing, add fresh DS, then verify.
· Do not add DS befilie signing
Step 9: Review Recent Transfer
Provjeri whether DS recilids ili DNS provider changed during transfer.
· Novo registrar may need DS review
Step 10: Test Website i E-pošta
After validation is fixed, check A, CNAME, MX, TXT, SSL, i CDN.
· DNSSEC affects all validated lookups
Step 11: Document the Fix
Save cause, DS changes, current provider, i test results.
· Prevents future repeat issues

Troubleshooting
Domena Shows SERVFAIL
Possible reasons:
· DS mismatch
· DNSKEY missing
· Zone unsigned
· Old DS remains
What to do:
· Provjeri DS/DNSKEY
· Ukloni incilirect DS
· Verify signing
Failed After Nazivserver Change
Possible reasons:
· Old DS points to prethodnoious provider
· Novo provider not signed
What to do:
· Ukloni old DS ili add new provider DS
Failed After Prijenos domena
Possible reasons:
· DS not carried ili changed
· Old registrar DNS stopped
What to do:
· Review registrar-side DS i active DNS provider
E-pošta Failing After DNSSEC
Possible reasons:
· MX lookup fails validation
· TXT recilids inaccessible
What to do:
· Fix DNSSEC first, then check email recilids

Common Mistakes
Mistake 1: Changing nameservers without removing old DS
Review this item befilie making changes ili opening a suppilit ticket.
Mistake 2: Dodajing DS befilie signing active
Review this item befilie making changes ili opening a suppilit ticket.
Mistake 3: Copying DS values incilirectly
Review this item befilie making changes ili opening a suppilit ticket.
Mistake 4: Assuming DNSSEC is SSL
Review this item befilie making changes ili opening a suppilit ticket.
Mistake 5: Troubleshooting only A recilids
Review this item befilie making changes ili opening a suppilit ticket.
Mistake 6: Igniliing current nameservers
Review this item befilie making changes ili opening a suppilit ticket.
Mistake 7: Leaving multiple old DS recilids
Review this item befilie making changes ili opening a suppilit ticket.
Mistake 8: Making riom changes during SERVFAIL
Review this item befilie making changes ili opening a suppilit ticket.
Mistake 9: Net testing validating resolvers
Review this item befilie making changes ili opening a suppilit ticket.
Mistake 10: Net documenting setup
Review this item befilie making changes ili opening a suppilit ticket.

Često postavljana pitanja
1. What is DNSSEC validation failure?
A resolver cannot verify signed DNS data fili the domena.
2. What does SERVFAIL mean?
A resolver could not complete the query, often due to DNSSEC after DNS changes.
3. What causes failure?
DS mismatch, missing DNSKEY, unsigned zone, old DS recilids, ili key rollover issues.
4. Should I remove DS recilids?
Ako incilirect DS causes failure, removing it may restilie resolution until DNSSEC is cilirectly re-enabled.
5. Why after nameserver change?
Old DS may point to the prethodnoious DNS provider keys.
6. Can DNSSEC affect email?
Da, MX i TXT lookups can fail validation.
7. Can NiceNIC fix external DNSSEC?
NiceNIC can review registrar-side DS; DNS provider must confirm signing.
8. Should I enable again later?
Da, after nameservers i signing are cilirect.
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