DNS

DNS zones

A DNS zone is a set of records that defines how a given domain and its subdomains behave. The zone contains various record types that determine where requests for the domain are routed.

DNS zone management for a domain is in the administration on the DNS card of the Serverlet.

DNS records

DNS records are the individual entries in a DNS zone that define the specific behaviour of a domain. Every record has a type, a name, a value, and a TTL (Time To Live). You can manage DNS records in the administration on the DNS card of the Serverlet, where you can add and delete them.

Supported record types

A

Maps a domain name to an IPv4 address.

mydomain.com.      IN      A      159.69.119.71

AAAA

Maps a domain name to an IPv6 address.

mydomain.com.      IN      AAAA   2a01:4f8:c010:d03::1

CNAME

Creates an alias from one domain name to another. It cannot be used for the main record of the domain (the apex), only for subdomains.

www.mydomain.com.  IN      CNAME  mydomain.com.

MX

Specifies the mail servers that receive mail for the domain. A lower priority number means a higher priority.

mydomain.com.      IN      MX      10 mail.mydomain.com.

TXT

Stores textual information, most often for domain ownership verification, SPF, or DKIM.

mydomain.com.      IN      TXT     "v=spf1 include:_spf.google.com ~all"

TTL (Time To Live)

The TTL determines how long DNS servers may keep a record in their cache before requesting the current value. A lower TTL means faster changes but more queries; the default TTL is usually 3,600 seconds, that is one hour.