DNS Records

The DNS data is represented as DNS records in a zone data file, and these files are handled by the name server. There are a number of different kinds of DNS records, each suited to a specific kind of data. The set of records in a zone file defines a domain properties and allows locating over the
Internet all of the sub-names and/or computers containing under the organizational domain name.

Please review the list of resource records containing in the zone file that corresponds to the selected domain.

Under this tab, you can add the following DNS records into zone file:

- A (host address)
- CNAME (alias)
- MX (mail server)
- NS (DNS server)

To add a record, click the New Record button.

The Disable zone button serves for removing a zone from your vendor name servers. A disabled zone stays in vendor database and can be Enabled, i.e., restored on your vendor name servers at any moment. Important: If a zone is kept on a remote name server that does not belong to your vendor DNS, this zone MUST be disabled.

The list of resource records displays the following:

Field Name | Description

Name

You can type the sub-domain name into this field. Since this form is designed for adding different types of records, we can say that the Name field should contain the subject of the query, e.g., the address you want to use as your Internet e-mail address (for MX record), or the alias name (for CNAME record), etc. However, to avoid any mistakes, please remember that:

- If you leave the Name field empty, the record will affect just the original domain name, not a sub-domain. In this case, after you save the record you will see the @ symbol in the record name column.
- If you type the @ symbol into the Name field, this will mean the same as described above.
- If you type the sub-domain with the trailing dot into the Name field (e.g., subdomain.domain.com.) the record will affect the sub-domain named subdomain.domain.com.
- If you type the sub-domain without the trailing dot into the Name field, (e.g., subdomain.my), the domain name indicated in this record (i.e., the contents of the Host field for example, domain.com) will be automatically appended to the record name and, as a result the record will affect the the sub-domain named subdomain.my.domain.com.

TTL

The period of time in seconds how long other name servers should cache, or save, this record (TTL is short for time-to-live). For example, the 86400 value corresponds to one day.
Note: The minimal default TTL for all the resource records containing in the zone file is being indicated in the SOA record. And this default TTL can be re-defined for every record containing in the zone file. Thus, if you leave the TTL field empty, then the default minimal TTL will be applied to this record.

Type | The type of record.

Priority | This field is designed for MX records only. The MX record priority is the digit within the range from 0 to 65535. The lower number is the higher is Mail Exchanger priority.
Value | The answer to the query. Records are always read from left to right, with the subject to be queried about on the left and the answer to the query on the right. For example, for MX record this field shows the mail server name, for CNAME record - the canonical name of the machine indicated before in the relevant A record, etc.

Examples:

To add the A record looking like:

first.mydomain.com. IN A 192.168.40.34

which means that the first.mydomain.com domain is mapped into the 192.168.40.34 IP address you should indicate the following in the form fields:

- first.mydomain.com. in the Name field (do not forget the trailing dot)
- select A from the Type drop-down menu
- type the IP address 192.168.40.34 into the Value field

To add the CNAME record looking like:

mail.first.mydomain.com. IN CNAME first.mydomain.com.

which means that the first.mydomain.com machine is also can be called as mail.first.mydomain.com you should indicate the following in the form fields:

- mail.first.mydomain.com. in the Name field (do not forget the trailing dot)
- select CNAME from the Type drop-down menu
- type the canonical name first.mydomain.com. into the Value field.

Note: Remember that there must always be an A record for the machine before aliases can be added.

To add the MX record looking like:

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

which allows your e-mail address to be "user@mydomain.com" rather than "user@mail.first.mydomain.com", specify the following in the form fields:

- mydomain.com. in the Name field (do not forget the trailing dot)
- select MX from the Type drop-down menu
- type 10 into the Priority field
- type mail.first.mydomain.com. (your mail server name) into the Value field

To add the NS record looking like:

first.mydomain.com. IN NS ns3.mydomain.com.

that declares the ns3.mydomain.com as the authoritative name server for the first.mydomain.com domain, specify the following in the form fields:

- first.mydomain.com. in the Name field (do not forget the trailing dot)
- select NS from the Type drop-down menu
- type ns3.mydomain.com in the Value field.

To add the SRV record looking like:

_http._tcp.example.com 86400 IN SRV 0 5 5060 httpserver.example.com.

that points to a server named httpserver.example.com listening on TCP port 80 for HTTP protocol connections. The priority given here is 0, and the weight is 5, specify the following in the form fields:

- _http._tcp in the Name field.
- 86400 in the TTL field
- select SRV from the Type drop-down menu.
- Type 0 5 5060 httpserver.example.com. into the Value field.

To add a TXT record looking like:

example.com IN 86400 TXT "Hostname used for examples only"

that specifies the example.com hostname as an example hostname, enter the following values into the form fields:

- example.com into the Name field.
- 86400 in the TTL field
- select TXT from the Type drop-down menu.
- Type "Hostname used for examples only" into the Value field.