CNAME kaydı
Aliases one hostname to another — the resolver follows it transparently.
CNAME kaydı nedir?
A CNAME (Canonical Name) record makes one hostname an alias of another. Resolvers chase the chain until they find an A/AAAA and return that. It is the standard way to point custom subdomains at CDN or PaaS hostnames (Cloudflare, Vercel, Netlify, AWS).
Örnek zone dosyası girdisi
www.example.com. 300 IN CNAME example.netlify.app.
Yaygın kullanım senaryoları
- ▸Point www → apex without managing IPs.
- ▸Custom domain → SaaS provider hostname (Vercel, Netlify, Heroku, GitHub Pages).
- ▸Custom CDN endpoint → CloudFront / Cloudflare / Bunny.
- ▸Service decoupling — change the upstream by editing one CNAME.
Tipik tuzaklar
A CNAME at the apex breaks the rest of the zone (MX, TXT, NS, etc.). Use ALIAS / ANAME / flattening at apex. Also: never CNAME a host that itself has MX or NS records.