ID #1321

Which DNS records are there and what do I have to consider ?

Below you find an overview of the most used DNS records. Please note that not all records are usable in each package.
Faulty entries in the DNS can lead to inaccessibility.

RecordType:          A
Description:        IPv4 address of a host
Standards for target: must contain IP adresses only (IPv6) (IPv4)
Example for target:
Wikipedia link:

RecordType:          AAAA
Description:        IPv6 address of a host
Standards for target: must contain IP adresses only (IPv6)
Example for target:    3efe:8124:3000:bf0::1

RecordType:         AFSDB
Description:       Resource Record for Cell Database server of the Andrew File Systems
Standards for target: #subtype hostname (where subtype has to be a number)

RecordType:             CERT
Description:           Resource Record for saving certificates (RFC4398)
Standards for target:    (see RFC 4398)
Further links:

RecordType:          CNAME
Description:        definies an alias name for an existing DNS name
Standards for target:  Always must be a hostname (FQDN)
Example for target:    subdomain.domain.tld
Wikipedia link:

RecordType:         DNSKEY
Description:       contains  a public key (DNSSEC) assigned to the name

Standards for target: ---

RecordType:         DS
Description:       handles the linkage of DNSSEC signed zones (DNSSEC)
standards for target: ---

RecordType:         HINFO
Description:       Hardware Info Record
Standards for target: text containing the used hardware for instance
Example for target:   i686 Linux

RecordType:         KEY
Description:      contains a public key assigned to the name
Standards for target: see RFC 2535
Wikipedia link:

RecordType:         LOC
Description:       location / see RFC 1876
Standards for target:   51 51 0.123 N 5 52 0.000 E 4.00m 1.00m 10000.00m 10.00m
Wikipedia link:


RecordType:         MX
Description:       mail exchange –  the mail server competent for the domain
Standards for target: hostname (no IP), use prio field for priority
Example for target:   mx10.domain.tld

RecordType:         NAPTR
Description:       Naming Authority Pointer - expansion of the A Resource Record
Standards for target: entries in the order: order, preference, flags, service,
                              regex, replacement
Example for target:    '110  30  "s"  "z3950+I2L+I2C"     ""  _z3250._tcp.domain.tld'.

RecordType:         NS
Description:       hostname of an authoritative name server
Standards for target: hostname (FQDN), no IP
Example for target:   ns1.domain.tld

RecordType:         NSEC
Description:       NSEC DNSSEC record type (DNSSEC)
Standards for target: ---
Wikipedia link:

RecordType:         PTR
Description:       Domain Name Pointer (for Reverse Mapping, assigning names to IP addresses)
Standards for target: ---
Wikipedia link:

RecordType:         RP
Description:        responsible person (RFC 1183)
Standards for target: ---  
Example for target:   tim.domain.tld tim.people.domain.tld
                             Means that tim@domain.tld ist responsible and more information can be found in the TXT record   "tim.people.domain.tld"

RecordType:         RRSIG
Description:       contains a digital signature (DNSSEC)
Standards for target: ---
Wikipedia link:

RecordType:         SPF
Description:       Sender Policy Framework
Standards for target:  see
Wikipedia link:
Wichtig:               input in the customer center must be enclosed in inverted commas, e.g.,
                             "v=spf1 ip4: a mx ~all"

RecordType:           SSHFP        
Description:         for Secure Shell (SSH) fingerprints
Standards for target:  an example from RFC 4255:
                               '2 1 123456789abcdef67890123456789abcdef67890'

RecordType:          SRV
Description:       offered service
Standards for target:  priority is set in the prio field, the rest in the target field
Example for target:    100 389

RecordType:          TXT        
Description:        loosely definiable, also used for Sender Policy
                              Framework (SPF)
Standards for target:  ---
Wikipedia link:
Important:               the entries must not be enclosed in inverted commas

Additional links:
Resource records at Wikipedia
DNS system at wikipedia

Tags: dns, DNS record, record

Related entries:

You cannot comment on this entry