Which DNS records can I set?
In order to determine the correct settings when creating or changing your DNS record, we have summarized all important specifications and guidelines for you.
Make sure to use only alphanumeric characters, dot, hyphen, underscore or asterisk for DNS records. The dot and hyphen must not be at the beginning or end position. The dot and hyphen must not be at the start or end position. For all record types, a maximum length of 10,000 characters must not be exceeded.
Below you will find the respective specifications for the different record types:
A
An A record (Address record) assigns a specific IPv4 address to a domain or subdomain (www.
, ftp.
, etc.).
Different subdomains can also point to different server IPs (and thus different web hosts).
At world4you we have already created A records for: your domain itself, as well as its subdomains ftp.
and www.
Example:
Name: ftp.beispielwebsite.at
Value: 203.0.113.195
This means that ftp.examplewebsite.at
points to the server IP 203.0.113.195
AAAA
An AAAA record (IPv6 address record) assigns a certain IPv6 address to a domain or subdomain (www.
, ftp.
, etc.).
Different subdomains can also point to different server IPs (and thus different web hosts).
Example:
Name: test.beispielwebsite.at
Value: 2001:0db8:85a3:0000:0000:8a2e:0370:7344
This means that test.beispielwebsite.at
points to the server IP 2001:0db8:85a3:0000:0000:8a2e:0370:7344
CNAME
A CNAME record (Canonical Name record) refers from one domain or subdomain to another subdomain. This can be used, for example, to ensure that the subdomain store
can refer to an external store, while the normal domain continues to refer to the IP address of its own web hoster.
Example:
Name: shop.beispielwebsite.at
Value: www.world4you.com
This means that store.beispielwebsite.at
refers to the domain www.world4you.com
.
A CNAME record cannot be used for the main domain, only for subdomains (e.g. www.
beispielwebsite.at).
MX
An MX record (Mail Exchanger Record) assigns a mail server and a priority to a domain. This record is used for e-mail delivery via SMTP. A low number means a higher priority.
Often, especially with external mail providers like Gmail or GMX, there are several mail servers that are the same for all users. To make sure that your e-mails arrive correctly, one or more additional servers are addressed in the specified order in case of server overload.
Example:
Record 1:
Name: (leer)
Priority: 1
Value: mail.beispielwebsite.at
Record 2:
Name: (leer)
Priority: 5
Value: mail02.beispielwebsite.at
This means that the mail server mail.examplewebsite.at
is tried first. Only if it does not respond, mail02.examplewebsite.at
is used.
TXT
A TXT record (Text Record) assigns a freely definable text to a domain. The possible applications of this record are manifold:
An essential use is to verify the domain owner. For example, if you want to use the Google Webmaster tools, Google will give you a code that you must enter in the TXT record of your domain. This way Google can make sure that the domain really belongs to you.
TXT record is also often used to create SPF, DKIM and DMARC records.
Example:
Name: hello.beispielwebsite.at
Value: "Hello World"
This means that hello.beispielwebsite.at
includes the message "Hello World
".
SRV
SRV Record (Service Resource Records) can be used to determine which IP-based services are offered in a domain. Some Internet protocols, such as Session Initiation Protocol (SIP) and Extensible Messaging and Presence Protocol (XMPP), but also applications such as Office 365 often require SRV support through network elements.
For SRV records, the value is composed of three individual values, the entire record must be constructed in the form <weight> <port> <server> and a priority.
Example:
Name: _autodiscover._tcp.beispielwebsite.at
Priority: 0
Value: 20 5060 server1.beispielwebsite.at
TLSA
DNS-based Authentication of Named Entities (DANE) is a network protocol for securing data traffic and ensures that used certificates cannot be exchanged unnoticed. A TLSA Record (Transport Layer Security Authentication) is used to determine which SSL/TLS certificates are allowed by clients with DANE support. With TLSA records the value is composed of four single values.
A TLSA record consists of four single values [number] [number] [number] [number] [hash].
Example:
Name: test.beispielwebsite.at
Value: 3 0 1
CAA
The DNS Certification Authority Authorization (CAA) is a security measure to prevent misuse during certificate issuance. It allows the domain owner to determine which certification authorities (CAs) are authorized to issue certificates for the domain. For CAA records, the value is made up of three individual values.
A CAA record consists of three single values [number] [text] [hostname].
Example:
Name: www.beispielwebsite.at
Value: 0 issue letsencrypt.org