Adding DNS Record
Resource Records define data types in the Domain Name System (DNS). Resource Records identified by RFC 1035 are stored in binary format internally for use by DNS software. But resource records are sent across a network in text format while they perform zone transfers. The following record types are available in Plesk:
- A (Address). Used for storing an IP address (specifically, an IPv4 32-bit address) associated with a domain name.
- NS (Authoritative name server). Specifies a host name (which must have an A record associated with it), where DNS information can be found about the domain name to which the NS record is attached. NS records are the basic infrastructure on which DNS is built; they stitch together distributed zone files into a directed graph that can be efficiently searched. Defined in RFC 1035.
- CNAME (Canonical name for a DNS alias). Note that if a domain name has a CNAME record associated with it, then it can not have any other record types. In addition, CNAME records should not point to domain names which themselves have associated CNAME records, so CNAME only provides one layer of indirection.
- MX (Mail Exchanger). Each MX record specifies a domain name (which must have an A record associated with it) and a priority; a list of mail exchangers is then ordered by priority when delivering mail. MX records provide one level of indirection in mapping the domain part of an email address to a list of host names which are meant to receive mail for that domain name. Critical part of the infrastructure used to support SMTP email.
- PTR (Domain name pointer). Provides a general indirection facility for DNS records. Most often used to provide a way to associate a domain name with an IPv4 address in the IN-ADDR.ARPA domain.
- TXT (Text string). Arbitrary binary data, up to 255 bytes in length.
- AXFR (Asynchronous Full Transfer Zone).
- SRV (service) records are a generalization and expansion of features provided by MX records. Where MX records work only for mail delivery and provide "failover" via the Priority value, SRV records add in support for load balancing (via the Weight value) and port selection (via the Port value). This type of records is available only in Plesk for Windows via API RPC v.126.96.36.199 and later.
Note: You can add a DNS record for the specified domain or to the DNS zone template. On creation of a new domain, Plesk automatically generates zone file for the domain or domain alias basing on the server template.