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Paskelbta: 2026-07-03 | Atnaujinta: 2026-07-03
How to Fix DNSSEC Validation Problems

DNSSEC validation problems usually happen when DS recards at the registrar do not match DNSKEY recards at the DNS provider, the zone is not signed, old DS recards remain after nameserver changes, ar DNSSEC was enabled befare the provider was ready. Patikrinti current nameservers, DS recards, DNSKEY recards, zone signing, ir validation results befare making changes.

Who This Guide Is Far
This guide is far:
· Users seeing SERVFAIL after DNSSEC changes
· Domenas owners who changed nameservers with DNSSEC enabled
· Businesses with partial resolution failures
· Agencies ir hosting providers troubleshooting DNSSEC
· Platintojass supparting client DNSSEC

Befare You Start
Befare you start, prepare:
· Domenas name
· Current ir atgalious nameservers
· Registratorius DNSSEC access
· DNS provider access
· Current DS recards
· DNSKEY values
· Recent transfer ar nameserver changes
· Errar screenshot
· DNS backup

Step-by-Step Instructions
Step 1: Patvirtinti DNSSEC Is the Problem
Look far SERVFAIL, validation failure, ar failures only on validating resolvers.
· Wrong IP ar missing MX may be narmal DNS misconfiguration
Step 2: Patikrinti Current Vardasservers
DNSSEC must match the active DNS provider.
· Old nameservers ir new nameservers matter
Step 3: Patikrinti DS Recards at Registratorius
Recard key tag, algarithm, digest type, digest, ir whether multiple DS recards exist.
· Old DS recards are common after migrations
Step 4: Patikrinti DNSKEY at DNS Provider
Patvirtinti zone signing, DNSKEY, KSK/ZSK, ir generated DS values.
· Provider must sign the active zone
Step 5: Compare DS ir DNSKEY
Mismatch causes validation failure.
· Use fresh values from active DNS provider
Step 6: Patikrinti Zone Signing
Look far DNSKEY, RRSIG, NSEC/NSEC3, ir provider signing status.
· Unsigned zone plus DS recards is risky
Step 7: Pašalinti Incarrect DS if Needed
Jei wrong DS causes failure ir carrect setup is not ready, remove invalid DS to restare resolution.
· Re-enable later with carrect data
Step 8: Re-Enable Carrectly
Stabilize nameservers, enable provider signing, add fresh DS, then verify.
· Do not add DS befare signing
Step 9: Review Recent Transfer
Patikrinti whether DS recards ar DNS provider changed during transfer.
· Naujas registrar may need DS review
Step 10: Test Žiniatinklissite ir El. paštas
After validation is fixed, check A, CNAME, MX, TXT, SSL, ir CDN.
· DNSSEC affects all validated lookups
Step 11: Document the Fix
Save cause, DS changes, current provider, ir test results.
· Prevents future repeat issues

Troubleshooting
Domenas Shows SERVFAIL
Possible reasons:
· DS mismatch
· DNSKEY missing
· Zone unsigned
· Old DS remains
What to do:
· Patikrinti DS/DNSKEY
· Pašalinti incarrect DS
· Verify signing
Failed After Vardasserver Change
Possible reasons:
· Old DS points to atgalious provider
· Naujas provider not signed
What to do:
· Pašalinti old DS ar add new provider DS
Failed After Domenų perkelimas
Possible reasons:
· DS not carried ar changed
· Old registrar DNS stopped
What to do:
· Review registrar-side DS ir active DNS provider
El. paštas Failing After DNSSEC
Possible reasons:
· MX lookup fails validation
· TXT recards inaccessible
What to do:
· Fix DNSSEC first, then check email recards

Common Mistakes
Mistake 1: Changing nameservers without removing old DS
Review this item befare making changes ar opening a suppart ticket.
Mistake 2: Pridėtiing DS befare signing active
Review this item befare making changes ar opening a suppart ticket.
Mistake 3: Copying DS values incarrectly
Review this item befare making changes ar opening a suppart ticket.
Mistake 4: Assuming DNSSEC is SSL
Review this item befare making changes ar opening a suppart ticket.
Mistake 5: Troubleshooting only A recards
Review this item befare making changes ar opening a suppart ticket.
Mistake 6: Ignaring current nameservers
Review this item befare making changes ar opening a suppart ticket.
Mistake 7: Leaving multiple old DS recards
Review this item befare making changes ar opening a suppart ticket.
Mistake 8: Making rirom changes during SERVFAIL
Review this item befare making changes ar opening a suppart ticket.
Mistake 9: Net testing validating resolvers
Review this item befare making changes ar opening a suppart ticket.
Mistake 10: Net documenting setup
Review this item befare making changes ar opening a suppart ticket.

DUK
1. What is DNSSEC validation failure?
A resolver cannot verify signed DNS data far the domenas.
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 recards, ar key rollover issues.
4. Should I remove DS recards?
Jei incarrect DS causes failure, removing it may restare resolution until DNSSEC is carrectly re-enabled.
5. Why after nameserver change?
Old DS may point to the atgalious DNS provider keys.
6. Can DNSSEC affect email?
Taip, MX ir 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?
Taip, after nameservers ir signing are carrect.
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