Domains & DNS / Practical guide

Understand DNS records

Connect a domain to a website or email without changing unrelated settings.

Steps

1. Get the values required by your provider: A or AAAA for an IP address, CNAME for an alias, MX for email.
2. Keep a copy of the DNS zone before changing it. Update only relevant records; preserve email entries when changing the website alone.
3. Check the authoritative DNS response afterwards. Caches may retain old values until the TTL expires.

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