DNS
Records, TTL, propagation: everything to point a domain at a server.
- AAAA Record: How to Add IPv6 to Your Domain Safely
An AAAA record maps a hostname to a 128-bit IPv6 address. When to add one, how to make nginx listen on IPv6, and why a broken AAAA record breaks certbot.
- CNAME vs A Record: Which One to Use and Where
CNAME vs A record: the bare domain needs A/AAAA, while www and subdomains on third-party services usually get a CNAME. Four rules and the conflicts panels show.
- DNS Propagation Time: Calculate It Instead of Waiting 48h
DNS propagation time equals the old record's TTL: usually 5 to 60 minutes for records, up to 48 hours for .com nameserver changes. How to work it out with dig.
- DNS TTL: Sensible Values for A, MX and TXT Records
DNS TTL sets how many seconds resolvers may cache a record. Recommended values from 300 to 86400, the lower-then-change migration routine and common mistakes.
- Point a Domain to Your Server: DNS Records, Not Forwarding
To point a domain to your server, set an A record (and AAAA for IPv6) to the server's IP, then add a virtual host and a certificate. Six steps, with dig.
- Set an A Record: Fields, Zone File Syntax and dig Checks
How to set an A record in four fields: name, TTL, type, IPv4 address. Includes zone file syntax, the @ vs blank question, dig checks and common panel mistakes.