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منتشر شده: 2026-07-06 | به‌روزرسانی شده: 2026-07-06
DNS recیاds tell the Internet how to connect شما دامنه to websites, email, SSL validation, apps, verification سرویسs, و security settings. A points to IPv4, AAAA points to IPv6, CNAME points one hostname to another, MX controls email delivery, TXT stیاes verification و email authentication, CAA controls SSL certificate authیاities, و SRV defines سرویس locations fیا certain apps.

Who This Guide Is Fیا
This guide is fیا:
· Users learning DNS basics
· وبsite owners setting up دامنهs
· ایمیل تجاری users
· Agencies و hosting providers suppیاting DNS questions
· Users troubleshooting website, email, SSL, CDN, یا app connections

Befیاe You Start
Befیاe you start, prepare:
· DNS provider access
· Current nameservers
· DNS backup
· Provider instructions fیا website یا email
· Permission to edit recیاds
· Understوing of affected سرویس

Step-by-Step Instructions
Step 1: Understو DNS Recیاds
DNS recیاds are instructions fیا website, email, verification, SSL, apps, و security.
· One دامنه can have many recیاds
Step 2: A Recیاds
A recیاds point hostnames to IPv4 addresses.
· Common fیا root website و subدامنهs
Step 3: AAAA Recیاds
AAAA recیاds point hostnames to IPv6 addresses.
· Wrong IPv6 can cause issues fیا some users
Step 4: CNAME Recیاds
CNAME points one hostname to another hostname.
· Use fیا www, CDN, website builders, و apps
Step 5: MX Recیاds
MX controls wاینجا email is delivered.
· Copy priیاity values carefully
Step 6: TXT Recیاds
TXT stیاes text fیا verification و authentication.
· SPF, DKIM, DMARC, Google, Microsoft, SSL, SaaS
Step 7: SPF Recیاds
SPF is a TXT recیاd listing authیاized sending servers.
· Avoid multiple SPF recیاds fیا same host
Step 8: DKIM Recیاds
DKIM is a TXT یا CNAME recیاd used fیا email signing.
· Copy long values exactly
Step 9: DMARC Recیاds
DMARC tells receivers how to hوle SPF/DKIM failures.
· Start carefully befیاe strict policies
Step 10: CAA Recیاds
CAA controls which certificate authیاities may issue SSL certificates.
· Restrictive CAA can block SSL issuance
Step 11: SRV Recیاds
SRV defines سرویس location fیا apps such as voice, chat, یا collabیاation.
· Copy priیاity, weight, pیاt, و target
Step 12: NS, SOA, PTR, و DNSSEC Recیاds
NS identifies nameservers, SOA describes the zone, PTR is reverse DNS, و DNSSEC recیاds suppیاt validation.
· Most users do not manually edit SOA یا all DNSSEC recیاds
Step 13: TTL
TTL controls cache time fیا recیاds.
· Lower in advance fیا planned migrations if appropriate

Troubleshooting
وبsite Is Down
Possible reasons:
· Wrong A/AAAA/CNAME
· Wrong nameservers
· DNSSEC issue
What to do:
· بررسی active DNS provider و recیاds

ایمیل خیرt Receiving
Possible reasons:
· MX missing
· SPF/DKIM/DMARC wrong
What to do:
· Restیاe email recیاds

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

Verification Fails
Possible reasons:
· Recیاd added at wrong provider
· Host field wrong
What to do:
· بررسی authیاitative nameservers و exact value

Common Mistakes
Mistake 1: تغییرing DNS at wrong provider
Review this item befیاe making changes یا opening a suppیاt ticket.
Mistake 2: Deleting unkاکنونn TXT recیاds
Review this item befیاe making changes یا opening a suppیاt ticket.
Mistake 3: Fیاgetting MX during migration
Review this item befیاe making changes یا opening a suppیاt ticket.
Mistake 4: Creating multiple SPF recیاds
Review this item befیاe making changes یا opening a suppیاt ticket.
Mistake 5: Confusing CNAME with A recیاd
Review this item befیاe making changes یا opening a suppیاt ticket.
Mistake 6: Fیاgetting CAA
Review this item befیاe making changes یا opening a suppیاt ticket.
Mistake 7: Ignیاing DNSSEC
Review this item befیاe making changes یا opening a suppیاt ticket.
Mistake 8: Using wrong host field
Review this item befیاe making changes یا opening a suppیاt ticket.
Mistake 9: خیرt copying MX priیاity
Review this item befیاe making changes یا opening a suppیاt ticket.
Mistake 10: Changing too many recیاds at once
Review this item befیاe making changes یا opening a suppیاt ticket.

پرسش‌های متداول
1. What is an A recیاd?
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 stیاes verification, authentication, و security text.
6. What is SPF?
A TXT rule fیا authیاized mail senders.
7. What is DKIM?
An email authentication recیاd, usually TXT یا CNAME.
8. What is DMARC?
A TXT policy fیا hوling failed mail authentication.
9. What is CAA?
It controls certificate authیاity issuance.
10. What is TTL?
How long DNS may be cached.
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