X
Опубликовано: 2026-07-06 | Обновлено: 2026-07-06
DNS rec Илиds tell the Internet how to connect Твой Доменное имя to websites, email, SSL validation, apps, verification обслуживаниеs, А security settings. A points to IPv4, AAAA points to IPv6, CNAME points one hostname to another, MX controls email delivery, TXT st Илиes verification А email authentication, CAA controls SSL certificate auth Илиities, А SRV defines обслуживание locations f Или certain apps.

Who This Guide Is F Или
This guide is f Или:
· Users learning DNS basics
· Вебsite owners setting up Доменное имяs
· Деловая электронная почта users
· Agencies А hosting providers supp Илиting DNS questions
· Users troubleshooting website, email, SSL, CDN, Или app connections

Bef Илиe You Start
Bef Илиe you start, prepare:
· DNS provider access
· Current nameservers
· DNS backup
· Provider instructions f Или website Или email
· Permission to edit rec Илиds
· UnderstАing of affected обслуживание

Step-by-Step Instructions
Step 1: UnderstА DNS Rec Илиds
DNS rec Илиds are instructions f Или website, email, verification, SSL, apps, А security.
· One Доменное имя can have many rec Илиds
Step 2: A Rec Илиds
A rec Илиds point hostnames to IPv4 addresses.
· Common f Или root website А subДоменное имяs
Step 3: AAAA Rec Илиds
AAAA rec Илиds point hostnames to IPv6 addresses.
· Wrong IPv6 can cause issues f Или some users
Step 4: CNAME Rec Илиds
CNAME points one hostname to another hostname.
· Use f Или www, CDN, website builders, А apps
Step 5: MX Rec Илиds
MX controls wздесь email is delivered.
· Copy pri Илиity values carefully
Step 6: TXT Rec Илиds
TXT st Илиes text f Или verification А authentication.
· SPF, DKIM, DMARC, Google, Microsoft, SSL, SaaS
Step 7: SPF Rec Илиds
SPF is a TXT rec Илиd listing auth Илиized sending servers.
· Avoid multiple SPF rec Илиds f Или same host
Step 8: DKIM Rec Илиds
DKIM is a TXT Или CNAME rec Илиd used f Или email signing.
· Copy long values exactly
Step 9: DMARC Rec Илиds
DMARC tells receivers how to hАle SPF/DKIM failures.
· Start carefully bef Илиe strict policies
Step 10: CAA Rec Илиds
CAA controls which certificate auth Илиities may issue SSL certificates.
· Restrictive CAA can block SSL issuance
Step 11: SRV Rec Илиds
SRV defines обслуживание location f Или apps such as voice, chat, Или collab Илиation.
· Copy pri Илиity, weight, p Илиt, А target
Step 12: NS, SOA, PTR, А DNSSEC Rec Илиds
NS identifies nameservers, SOA describes the zone, PTR is reverse DNS, А DNSSEC rec Илиds supp Илиt validation.
· Most users do not manually edit SOA Или all DNSSEC rec Илиds
Step 13: TTL
TTL controls cache time f Или rec Илиds.
· Lower in advance f Или planned migrations if appropriate

Troubleshooting
Вебsite Is Down
Possible reasons:
· Wrong A/AAAA/CNAME
· Wrong nameservers
· DNSSEC issue
What to do:
· Проверка active DNS provider А rec Илиds

Электронная почта Нет!t Receiving
Possible reasons:
· MX missing
· SPF/DKIM/DMARC wrong
What to do:
· Rest Илиe email rec Илиds

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

Verification Fails
Possible reasons:
· Rec Илиd added at wrong provider
· Host field wrong
What to do:
· Проверка auth Илиitative nameservers А exact value

Common Mistakes
Mistake 1: Редактированиеing DNS at wrong provider
Review this item bef Илиe making changes Или opening a supp Илиt ticket.
Mistake 2: Deleting unkсейчасn TXT rec Илиds
Review this item bef Илиe making changes Или opening a supp Илиt ticket.
Mistake 3: F Илиgetting MX during migration
Review this item bef Илиe making changes Или opening a supp Илиt ticket.
Mistake 4: Creating multiple SPF rec Илиds
Review this item bef Илиe making changes Или opening a supp Илиt ticket.
Mistake 5: Confusing CNAME with A rec Илиd
Review this item bef Илиe making changes Или opening a supp Илиt ticket.
Mistake 6: F Илиgetting CAA
Review this item bef Илиe making changes Или opening a supp Илиt ticket.
Mistake 7: Ign Илиing DNSSEC
Review this item bef Илиe making changes Или opening a supp Илиt ticket.
Mistake 8: Using wrong host field
Review this item bef Илиe making changes Или opening a supp Илиt ticket.
Mistake 9: Нет!t copying MX pri Илиity
Review this item bef Илиe making changes Или opening a supp Илиt ticket.
Mistake 10: Changing too many rec Илиds at once
Review this item bef Илиe making changes Или opening a supp Илиt ticket.

Вопросы и ответы
1. What is an A rec Илиd?
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 st Илиes verification, authentication, А security text.
6. What is SPF?
A TXT rule f Или auth Илиized mail senders.
7. What is DKIM?
An email authentication rec Илиd, usually TXT Или CNAME.
8. What is DMARC?
A TXT policy f Или hАling failed mail authentication.
9. What is CAA?
It controls certificate auth Илиity issuance.
10. What is TTL?
How long DNS may be cached.
Требуется помощь? Мы всегда здесь для вас. Отправить запрос
Авторское право © 2006-2026 NICENIC INTERNATIONAL GROUP CO., LIMITED Все права защищены