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Yayınlandı: 2026-07-03 | Güncellendi: 2026-07-03
How to Fix DNSSEC Validation Problems

DNSSEC validation problems usually happen when DS recveyads at the registrar do not match DNSKEY recveyads at the DNS provider, the zone is not signed, old DS recveyads remain after nameserver changes, veya DNSSEC was enabled befveyae the provider was ready. Kontrol Et current nameservers, DS recveyads, DNSKEY recveyads, zone signing, ve validation results befveyae making changes.

Who This Guide Is Fveya
This guide is fveya:
· Users seeing SERVFAIL after DNSSEC changes
· Alan Adı owners who changed nameservers with DNSSEC enabled
· Businesses with partial resolution failures
· Agencies ve hosting providers troubleshooting DNSSEC
· Bayis suppveyating client DNSSEC

Befveyae You Start
Befveyae you start, prepare:
· Alan Adı name
· Current ve öncekiious nameservers
· Kayıt Kuruluşu DNSSEC access
· DNS provider access
· Current DS recveyads
· DNSKEY values
· Recent transfer veya nameserver changes
· Errveya screenshot
· DNS backup

Step-by-Step Instructions
Step 1: Onayla DNSSEC Is the Problem
Look fveya SERVFAIL, validation failure, veya failures only on validating resolvers.
· Wrong IP veya missing MX may be nveyamal DNS misconfiguration
Step 2: Kontrol Et Current Adservers
DNSSEC must match the active DNS provider.
· Old nameservers ve new nameservers matter
Step 3: Kontrol Et DS Recveyads at Kayıt Kuruluşu
Recveyad key tag, algveyaithm, digest type, digest, ve whether multiple DS recveyads exist.
· Old DS recveyads are common after migrations
Step 4: Kontrol Et DNSKEY at DNS Provider
Onayla zone signing, DNSKEY, KSK/ZSK, ve generated DS values.
· Provider must sign the active zone
Step 5: Compare DS ve DNSKEY
Mismatch causes validation failure.
· Use fresh values from active DNS provider
Step 6: Kontrol Et Zone Signing
Look fveya DNSKEY, RRSIG, NSEC/NSEC3, ve provider signing status.
· Unsigned zone plus DS recveyads is risky
Step 7: Kaldır Incveyarect DS if Needed
Eğer wrong DS causes failure ve cveyarect setup is not ready, remove invalid DS to restveyae resolution.
· Re-enable later with cveyarect data
Step 8: Re-Enable Cveyarectly
Stabilize nameservers, enable provider signing, add fresh DS, then verify.
· Do not add DS befveyae signing
Step 9: Review Recent Transfer
Kontrol Et whether DS recveyads veya DNS provider changed during transfer.
· Yeni registrar may need DS review
Step 10: Test Website ve E-posta
After validation is fixed, check A, CNAME, MX, TXT, SSL, ve CDN.
· DNSSEC affects all validated lookups
Step 11: Document the Fix
Save cause, DS changes, current provider, ve test results.
· Prevents future repeat issues

Troubleshooting
Alan Adı Shows SERVFAIL
Possible reasons:
· DS mismatch
· DNSKEY missing
· Zone unsigned
· Old DS remains
What to do:
· Kontrol Et DS/DNSKEY
· Kaldır incveyarect DS
· Verify signing
Failed After Adserver Change
Possible reasons:
· Old DS points to öncekiious provider
· Yeni provider not signed
What to do:
· Kaldır old DS veya add new provider DS
Failed After Domain Transferi
Possible reasons:
· DS not carried veya changed
· Old registrar DNS stopped
What to do:
· Review registrar-side DS ve active DNS provider
E-posta Failing After DNSSEC
Possible reasons:
· MX lookup fails validation
· TXT recveyads inaccessible
What to do:
· Fix DNSSEC first, then check email recveyads

Common Mistakes
Mistake 1: Changing nameservers without removing old DS
Review this item befveyae making changes veya opening a suppveyat ticket.
Mistake 2: Ekleing DS befveyae signing active
Review this item befveyae making changes veya opening a suppveyat ticket.
Mistake 3: Copying DS values incveyarectly
Review this item befveyae making changes veya opening a suppveyat ticket.
Mistake 4: Assuming DNSSEC is SSL
Review this item befveyae making changes veya opening a suppveyat ticket.
Mistake 5: Troubleshooting only A recveyads
Review this item befveyae making changes veya opening a suppveyat ticket.
Mistake 6: Ignveyaing current nameservers
Review this item befveyae making changes veya opening a suppveyat ticket.
Mistake 7: Leaving multiple old DS recveyads
Review this item befveyae making changes veya opening a suppveyat ticket.
Mistake 8: Making rveom changes during SERVFAIL
Review this item befveyae making changes veya opening a suppveyat ticket.
Mistake 9: Hayırt testing validating resolvers
Review this item befveyae making changes veya opening a suppveyat ticket.
Mistake 10: Hayırt documenting setup
Review this item befveyae making changes veya opening a suppveyat ticket.

SSS
1. What is DNSSEC validation failure?
A resolver cannot verify signed DNS data fveya the domain.
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 recveyads, veya key rollover issues.
4. Should I remove DS recveyads?
Eğer incveyarect DS causes failure, removing it may restveyae resolution until DNSSEC is cveyarectly re-enabled.
5. Why after nameserver change?
Old DS may point to the öncekiious DNS provider keys.
6. Can DNSSEC affect email?
Evet, MX ve 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?
Evet, after nameservers ve signing are cveyarect.
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