X
Zverejnené: 2026-07-06 | Aktualizované: 2026-07-06
DNS recalebods tell the Internet how to connect vaše doména to websites, email, SSL validation, apps, verification službas, a security settings. A points to IPv4, AAAA points to IPv6, CNAME points one hostname to another, MX controls email delivery, TXT staleboes verification a email authentication, CAA controls SSL certificate authaleboities, a SRV defines služba locations falebo certain apps.

Who This Guide Is Falebo
This guide is falebo:
· Users learning DNS basics
· Website owners setting up doménas
· Firemný e-mail users
· Agencies a hosting providers suppaleboting DNS questions
· Users troubleshooting website, email, SSL, CDN, alebo app connections

Befaleboe You Start
Befaleboe you start, prepare:
· DNS provider access
· Current nameservers
· DNS backup
· Provider instructions falebo website alebo email
· Permission to edit recalebods
· Understaing of affected služba

Step-by-Step Instructions
Step 1: Understa DNS Recalebods
DNS recalebods are instructions falebo website, email, verification, SSL, apps, a security.
· One doména can have many recalebods
Step 2: A Recalebods
A recalebods point hostnames to IPv4 addresses.
· Common falebo root website a subdoménas
Step 3: AAAA Recalebods
AAAA recalebods point hostnames to IPv6 addresses.
· Wrong IPv6 can cause issues falebo some users
Step 4: CNAME Recalebods
CNAME points one hostname to another hostname.
· Use falebo www, CDN, website builders, a apps
Step 5: MX Recalebods
MX controls wtu email is delivered.
· Copy prialeboity values carefully
Step 6: TXT Recalebods
TXT staleboes text falebo verification a authentication.
· SPF, DKIM, DMARC, Google, Microsoft, SSL, SaaS
Step 7: SPF Recalebods
SPF is a TXT recalebod listing authaleboized sending servers.
· Avoid multiple SPF recalebods falebo same host
Step 8: DKIM Recalebods
DKIM is a TXT alebo CNAME recalebod used falebo email signing.
· Copy long values exactly
Step 9: DMARC Recalebods
DMARC tells receivers how to hale SPF/DKIM failures.
· Start carefully befaleboe strict policies
Step 10: CAA Recalebods
CAA controls which certificate authaleboities may issue SSL certificates.
· Restrictive CAA can block SSL issuance
Step 11: SRV Recalebods
SRV defines služba location falebo apps such as voice, chat, alebo collabaleboation.
· Copy prialeboity, weight, palebot, a target
Step 12: NS, SOA, PTR, a DNSSEC Recalebods
NS identifies nameservers, SOA describes the zone, PTR is reverse DNS, a DNSSEC recalebods suppalebot validation.
· Most users do not manually edit SOA alebo all DNSSEC recalebods
Step 13: TTL
TTL controls cache time falebo recalebods.
· Lower in advance falebo planned migrations if appropriate

Troubleshooting
Website Is Down
Possible reasons:
· Wrong A/AAAA/CNAME
· Wrong nameservers
· DNSSEC issue
What to do:
· Skontrolovať active DNS provider a recalebods

Email Niet Receiving
Possible reasons:
· MX missing
· SPF/DKIM/DMARC wrong
What to do:
· Restaleboe email recalebods

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

Verification Fails
Possible reasons:
· Recalebod added at wrong provider
· Host field wrong
What to do:
· Skontrolovať authaleboitative nameservers a exact value

Common Mistakes
Mistake 1: Upraviťing DNS at wrong provider
Review this item befaleboe making changes alebo opening a suppalebot ticket.
Mistake 2: Deleting unkterazn TXT recalebods
Review this item befaleboe making changes alebo opening a suppalebot ticket.
Mistake 3: Falebogetting MX during migration
Review this item befaleboe making changes alebo opening a suppalebot ticket.
Mistake 4: Creating multiple SPF recalebods
Review this item befaleboe making changes alebo opening a suppalebot ticket.
Mistake 5: Confusing CNAME with A recalebod
Review this item befaleboe making changes alebo opening a suppalebot ticket.
Mistake 6: Falebogetting CAA
Review this item befaleboe making changes alebo opening a suppalebot ticket.
Mistake 7: Ignaleboing DNSSEC
Review this item befaleboe making changes alebo opening a suppalebot ticket.
Mistake 8: Using wrong host field
Review this item befaleboe making changes alebo opening a suppalebot ticket.
Mistake 9: Niet copying MX prialeboity
Review this item befaleboe making changes alebo opening a suppalebot ticket.
Mistake 10: Changing too many recalebods at once
Review this item befaleboe making changes alebo opening a suppalebot ticket.

Často kladené otázky
1. What is an A recalebod?
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 staleboes verification, authentication, a security text.
6. What is SPF?
A TXT rule falebo authaleboized mail senders.
7. What is DKIM?
An email authentication recalebod, usually TXT alebo CNAME.
8. What is DMARC?
A TXT policy falebo haling failed mail authentication.
9. What is CAA?
It controls certificate authaleboity issuance.
10. What is TTL?
How long DNS may be cached.
Potrebujete pomoc? Sme tu pre vás vždy. Odoslať požiadavku
Autorské práva © 2006-2026 NICENIC INTERNATIONAL GROUP CO., LIMITED Všetky práva vyhradené