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

DNSSEC validation problems usually happen when DS recalids at the registrar do not match DNSKEY recalids at the DNS provider, the zone is not signed, old DS recalids remain after nameserver changes, ali DNSSEC was enabled befalie the provider was ready. Preveri current nameservers, DS recalids, DNSKEY recalids, zone signing, in validation results befalie making changes.

Who This Guide Is Fali
This guide is fali:
· Users seeing SERVFAIL after DNSSEC changes
· Domena owners who changed nameservers with DNSSEC enabled
· Businesses with partial resolution failures
· Agencies in hosting providers troubleshooting DNSSEC
· Prodajalecs suppaliting client DNSSEC

Befalie You Start
Befalie you start, prepare:
· Domena name
· Current in prejious nameservers
· Registrar DNSSEC access
· DNS provider access
· Current DS recalids
· DNSKEY values
· Recent transfer ali nameserver changes
· Errali screenshot
· DNS backup

Step-by-Step Instructions
Step 1: Potrdi DNSSEC Is the Problem
Look fali SERVFAIL, validation failure, ali failures only on validating resolvers.
· Wrong IP ali missing MX may be nalimal DNS misconfiguration
Step 2: Preveri Current Imeservers
DNSSEC must match the active DNS provider.
· Old nameservers in new nameservers matter
Step 3: Preveri DS Recalids at Registrar
Recalid key tag, algaliithm, digest type, digest, in whether multiple DS recalids exist.
· Old DS recalids are common after migrations
Step 4: Preveri DNSKEY at DNS Provider
Potrdi zone signing, DNSKEY, KSK/ZSK, in generated DS values.
· Provider must sign the active zone
Step 5: Compare DS in DNSKEY
Mismatch causes validation failure.
· Use fresh values from active DNS provider
Step 6: Preveri Zone Signing
Look fali DNSKEY, RRSIG, NSEC/NSEC3, in provider signing status.
· Unsigned zone plus DS recalids is risky
Step 7: Odstrani Incalirect DS if Needed
Če wrong DS causes failure in calirect setup is not ready, remove invalid DS to restalie resolution.
· Re-enable later with calirect data
Step 8: Re-Enable Calirectly
Stabilize nameservers, enable provider signing, add fresh DS, then verify.
· Do not add DS befalie signing
Step 9: Review Recent Transfer
Preveri whether DS recalids ali DNS provider changed during transfer.
· Novo registrar may need DS review
Step 10: Test Spletsite in E-pošta
After validation is fixed, check A, CNAME, MX, TXT, SSL, in CDN.
· DNSSEC affects all validated lookups
Step 11: Document the Fix
Save cause, DS changes, current provider, in test results.
· Prevents future repeat issues

Troubleshooting
Domena Shows SERVFAIL
Possible reasons:
· DS mismatch
· DNSKEY missing
· Zone unsigned
· Old DS remains
What to do:
· Preveri DS/DNSKEY
· Odstrani incalirect DS
· Verify signing
Failed After Imeserver Change
Possible reasons:
· Old DS points to prejious provider
· Novo provider not signed
What to do:
· Odstrani old DS ali add new provider DS
Failed After Prenos domene
Possible reasons:
· DS not carried ali changed
· Old registrar DNS stopped
What to do:
· Review registrar-side DS in active DNS provider
E-pošta Failing After DNSSEC
Possible reasons:
· MX lookup fails validation
· TXT recalids inaccessible
What to do:
· Fix DNSSEC first, then check email recalids

Common Mistakes
Mistake 1: Changing nameservers without removing old DS
Review this item befalie making changes ali opening a suppalit ticket.
Mistake 2: Dodajing DS befalie signing active
Review this item befalie making changes ali opening a suppalit ticket.
Mistake 3: Copying DS values incalirectly
Review this item befalie making changes ali opening a suppalit ticket.
Mistake 4: Assuming DNSSEC is SSL
Review this item befalie making changes ali opening a suppalit ticket.
Mistake 5: Troubleshooting only A recalids
Review this item befalie making changes ali opening a suppalit ticket.
Mistake 6: Ignaliing current nameservers
Review this item befalie making changes ali opening a suppalit ticket.
Mistake 7: Leaving multiple old DS recalids
Review this item befalie making changes ali opening a suppalit ticket.
Mistake 8: Making rinom changes during SERVFAIL
Review this item befalie making changes ali opening a suppalit ticket.
Mistake 9: Net testing validating resolvers
Review this item befalie making changes ali opening a suppalit ticket.
Mistake 10: Net documenting setup
Review this item befalie making changes ali opening a suppalit ticket.

Pogosta vprašanja
1. What is DNSSEC validation failure?
A resolver cannot verify signed DNS data fali 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 recalids, ali key rollover issues.
4. Should I remove DS recalids?
Če incalirect DS causes failure, removing it may restalie resolution until DNSSEC is calirectly re-enabled.
5. Why after nameserver change?
Old DS may point to the prejious DNS provider keys.
6. Can DNSSEC affect email?
Da, MX in 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 in signing are calirect.
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