X
Paskelbta: 2026-07-06 | Atnaujinta: 2026-07-06
DNS recards tell the Internet how to connect jūsų domenas to websites, email, SSL validation, apps, verification paslaugas, ir security settings. A points to IPv4, AAAA points to IPv6, CNAME points one hostname to another, MX controls email delivery, TXT stares verification ir email authentication, CAA controls SSL certificate autharities, ir SRV defines paslauga locations far certain apps.

Who This Guide Is Far
This guide is far:
· Users learning DNS basics
· Žiniatinklissite owners setting up domenass
· Biznio el. paštas users
· Agencies ir hosting providers supparting DNS questions
· Users troubleshooting website, email, SSL, CDN, ar app connections

Befare You Start
Befare you start, prepare:
· DNS provider access
· Current nameservers
· DNS backup
· Provider instructions far website ar email
· Permission to edit recards
· Understiring of affected paslauga

Step-by-Step Instructions
Step 1: Understir DNS Recards
DNS recards are instructions far website, email, verification, SSL, apps, ir security.
· One domenas can have many recards
Step 2: A Recards
A recards point hostnames to IPv4 addresses.
· Common far root website ir subdomenass
Step 3: AAAA Recards
AAAA recards point hostnames to IPv6 addresses.
· Wrong IPv6 can cause issues far some users
Step 4: CNAME Recards
CNAME points one hostname to another hostname.
· Use far www, CDN, website builders, ir apps
Step 5: MX Recards
MX controls wčia email is delivered.
· Copy priarity values carefully
Step 6: TXT Recards
TXT stares text far verification ir authentication.
· SPF, DKIM, DMARC, Google, Microsoft, SSL, SaaS
Step 7: SPF Recards
SPF is a TXT recard listing autharized sending servers.
· Avoid multiple SPF recards far same host
Step 8: DKIM Recards
DKIM is a TXT ar CNAME recard used far email signing.
· Copy long values exactly
Step 9: DMARC Recards
DMARC tells receivers how to hirle SPF/DKIM failures.
· Start carefully befare strict policies
Step 10: CAA Recards
CAA controls which certificate autharities may issue SSL certificates.
· Restrictive CAA can block SSL issuance
Step 11: SRV Recards
SRV defines paslauga location far apps such as voice, chat, ar collabaration.
· Copy priarity, weight, part, ir target
Step 12: NS, SOA, PTR, ir DNSSEC Recards
NS identifies nameservers, SOA describes the zone, PTR is reverse DNS, ir DNSSEC recards suppart validation.
· Most users do not manually edit SOA ar all DNSSEC recards
Step 13: TTL
TTL controls cache time far recards.
· Lower in advance far planned migrations if appropriate

Troubleshooting
Žiniatinklissite Is Down
Possible reasons:
· Wrong A/AAAA/CNAME
· Wrong nameservers
· DNSSEC issue
What to do:
· Patikrinti active DNS provider ir recards

El. paštas Net Receiving
Possible reasons:
· MX missing
· SPF/DKIM/DMARC wrong
What to do:
· Restare email recards

SSL Cannot Be Issued
Possible reasons:
· CAA blocks CA
· TXT/CNAME validation missing
What to do:
· Review CAA ir validation recards

Verification Fails
Possible reasons:
· Recard added at wrong provider
· Host field wrong
What to do:
· Patikrinti autharitative nameservers ir exact value

Common Mistakes
Mistake 1: Redaguotiing DNS at wrong provider
Review this item befare making changes ar opening a suppart ticket.
Mistake 2: Deleting unkdabarn TXT recards
Review this item befare making changes ar opening a suppart ticket.
Mistake 3: Fargetting MX during migration
Review this item befare making changes ar opening a suppart ticket.
Mistake 4: Creating multiple SPF recards
Review this item befare making changes ar opening a suppart ticket.
Mistake 5: Confusing CNAME with A recard
Review this item befare making changes ar opening a suppart ticket.
Mistake 6: Fargetting CAA
Review this item befare making changes ar opening a suppart ticket.
Mistake 7: Ignaring DNSSEC
Review this item befare making changes ar opening a suppart ticket.
Mistake 8: Using wrong host field
Review this item befare making changes ar opening a suppart ticket.
Mistake 9: Net copying MX priarity
Review this item befare making changes ar opening a suppart ticket.
Mistake 10: Changing too many recards at once
Review this item befare making changes ar opening a suppart ticket.

DUK
1. What is an A recard?
It points to an IPv4 address.
2. What is AAAA?
It points to an IPv6 address.
3. What is CNAME?
It points one hostname to another hostname.
4. What is MX?
It controls email delivery.
5. What is TXT?
It stares verification, authentication, ir security text.
6. What is SPF?
A TXT rule far autharized mail senders.
7. What is DKIM?
An email authentication recard, usually TXT ar CNAME.
8. What is DMARC?
A TXT policy far hirling failed mail authentication.
9. What is CAA?
It controls certificate autharity issuance.
10. What is TTL?
How long DNS may be cached.
Reikia pagalbos? Mes visada pasiruošę jums padėti. Pateikti užklausą
Autorių teisės © 2006-2026 NICENIC INTERNATIONAL GROUP CO., LIMITED Visos teisės saugomos