DNS Zone Manager Print

DNS Zone Manager

Overview

This feature allows you to edit the records in a domain’s DNS (Domain Name System) zone file. DNS converts human-readable domain names (for example, example.com) to computer-readable IP addresses (for example, 192.0.0.1). To perform this function, DNS relies on zone records that exist on your server to map domain names to IP addresses.

Important:

• We deprecated the MyDNS and NSD nameserver software in cPanel & WHM version 78 and plan to remove them in a future release. If you use either of these nameservers, we strongly recommend that you migrate to either the PowerDNS or BIND namesevers. For more information, read our cPanel Deprecation Plan documentation.
• DNS zones that reside on other Write-only DNS servers in a DNS cluster do not appear in this interface.

Domains

The DNS Zone Manager interface displays all of your server’s domains. To filter the list, enter a name in the text box. For each listed domain, you can perform the following actions:

• A Record — Create a new A record. When you select this record type, a new window will appear. Enter a valid DNS zone name in the Name text box and a valid IPv4 address in the Address text box. Click Add an A Record to save your changes.
• CNAME Record — Create a new CNAME record. When you select this record type, a new window will appear. Enter a valid DNS zone name in the Name text box and a FQDN in the CNAME text box. Click Add a CNAME Record to save your changes.
• MX Record — Create a new MX record. When you select this record type, a new window will appear. Enter the record’s priority value in the Priority text box and a FQDN in the Destination text box. Click Add an MX Record to save your changes.
• DNSSEC — Manage the domain’s DNSSEC (Domain Name System Security Extensions) records. When you select this record type, the system directs you to the View DNSSEC Keys interface.
• Manage — Add or edit additional domain records. When you select this setting, the system directs you to the Manage DNS Zone Records interface.

Manage DNS Zone Records

This interface displays a table with a list of the selected domain’s DNS zone records. To filter the list, enter a name in the text box or select a record type filter. You can also use this interface to add, edit, or delete the domain’s DNS zone record.

Add a DNS zone record

To add a DNS zone record, perform the following steps:

1. Click Manage next to the domain you want to modify.
2. Click Add Record. You can also click the arrow icon () and select the desired record type from the list.
3. Enter the record information.
4. Click Add Record.

DNS zone record types

When you add a new DNS zone record, you can select from the following types:

A

IPv4 Address Record — This record maps hostnames to IPv4 addresses. These records allow DNS servers to identify and locate your website and its various services on the Internet. Without appropriate A records, your visitors cannot access your website, FTP site, or email accounts.

AAAA

IPv6 Address Record — This record is the same as an A record, but maps hostnames to IPv6 addresses.

AFSDB

Andrew File System Data Base Location — This record provides the location of the domain name’s Andrew File System (AFS) database server or Distributed Computing Environment (DCE) authentication server. You can set the following values:

• Subtype — The type of server the record points to. You can use one of the following values:
  • 1 — An AFS location server.
  • 2 — A DCE authentication server.
• Hostname — The domain name of the database server.

CAA

Certificate Authority Authorization Record — This record controls which certificate authorities (CA) can issue SSL certificates for a domain.

Note:

• If no CAA records exist for a domain, all CAs can issue certificates for that domain. If conflicting CAA records already exist, remove the existing CAA records or add one for the desired CA.
• MyDNS does not support this record type.
• The system stores these records in the RFC 3597 format.

This record contains the following configuration settings:

• Issuer Critical Flag — Whether the CA will issue an SSL certificate if the CAA Resource Record contains unknown property tags. For more information about CAA record flags, read the RFC 6844 documentation.
  • 0 — Non-critical. The CA will issue an SSL certificate if the CAA Resource Record contains unknown property tags.
  • 1 — Critical. The CA will not issue an SSL certificate if the CAA Resource Record contains unknown property tags.
• Tag — The CAA record’s property type:
  • issue — Authorize a CA to issue a certificate for the domain.
  • issuewild — Authorize a CA to issue a wildcard certificate for the domain.
  • iodef — Specify a URL to which a CA may report policy violations.
• Value — The CA’s domain, or the CA’s URL if you select the iodef setting in the Tag section.

CNAME

Canonical Name Record — This record creates an alias for another domain name, which DNS resolves. This is useful, for example, if you point multiple CNAME records to a single A record in order to simplify DNS maintenance. When you add a CNAME record, enter the following information:

• Name — A new or existing DNS zone name. When you enter a zone name, the system automatically appends the domain name to the zone record. For example, if you create the user zone, the system will add the example.com. domain information.
• Record — Enter a fully-qualified domain name (FQDN). For example, the example2.com domain. You cannot point a CNAME record to an IP address.

When you are finished, click Add Record to save the new CNAME record.

DMARC

Domain-based Message Authentication, Reporting, and Conformance — This record indicates the action for a mail server to take when it receives an email from this domain, but that message fails SPF and DKIM checks.

Note:

This record type is only available via the Add Record menu. To select this record, click the arrow icon () by the Add Record button, then select Add “DMARC” Record from the list.

When you select this setting, the system creates a TXT record with a default DMARC record. The system also displays a form that allows you to define the domain’s DMARC Policy (None, Quarantine, or Reject), as well as the following optional parameters:

• Subdomain Policy — The action the mail server will take when it receives an email from the domain’s subdomain. The server only takes this action if the email fails its SPF and DKIM checks.
  • None — Do not take any action.
  • Quarantine — Send spam email to a different folder on the account.
  • Reject — Reject spam email.
• DKIM Mode — The DomainKeys Identified Mail (DKIM) level that the server enforces for the domain. An email must have a valid DKIM signature. The server will check a DKIM signature against the email’s From: domain entry. You can set the following identifier alignment settings:
  • Relaxed — Only the organizational domains must match. For example, an email from the domain.example.com subdomain of example.com would pass the DKIM check.
  • Strict — The domains must match exactly. For example, the server will accept email from the example.com domain, but it would reject email from the domain.example.com subdomain.
• SPF Mode — The Sender Policy Framework (SPF) level that the server will enforce for the domain. The server sending email must pass SPF authorization. The server checks the server sending an email with the SMTP MAIL FROM command. The server then checks the MAIL FROM domain entry against the email’s From: domain entry. You can set the following identifier alignment settings:
  • Relaxed — Only the organizational domains must match. For example, an email from the domain.example.com subdomain of example.com would pass the SPF check.
  • Strict — The domains must match exactly. For example, the server will only accept email if the domain is example.com. It would reject an email from the domain.example.com domain.
• Percentage — The percentage of emails that you want the server to filter.
• Generate Failure Reports When — The error reporting policy between the sender and receiver’s Mail Transfer Agents.
• Report Format — The format that the server uses to report an email’s possible spam status.
• Report Interval — The amount of time, in seconds, that elapse between each aggregate email report. This parameter’s value defaults to 86400.

Note:

This value does not include email failure messages.

• Send Aggregate Mail Reports To — A comma-separated list of Uniform Resource Identifiers (URIs) to which to send the aggregate email reports. If your URI includes a comma, you must URI-encode the comma. To add a size limit for the report, include an exclamation point, a number, and a file size unit to the end of the URI. For example: mailto:reports@example.com!50m. You can specify the following file size units:
  • k — Kilobytes.
  • m — Megabytes.
  • g — Gigabytes.
  • t — Terabytes.
• Send Failure Reports To — A comma-separated list of URIs to which to send failure email reports.

DNAME

Delegation Name — This record sets an alias for an entire DNS name space. This differs from the CNAME record, which only provides an alias for a single name.

DS

Delegation Signer — This record identifies the DNSSEC signing key of a delegation zone. You can set the following values:

Note:

You can obtain this information from your domain’s registrar. This record type does not update the information with your registrar.

• Key tag — The key tag of the DNSKEY the DS record refers to, in network byte order.
• Algorithm — The algorithm number of the DNSKEY the DS record refers to.
• Digest Type — The algorithm used to generate the Digest field.
• Digest — The digest that the algorithm generates.

For more information, read the View DNSSEC Keys section.

HINFO

Host Information — This record provides information about the host’s CPU type and operating system. This allows protocols to choose the best way to communicate with a similar host.

• CPU — The host’s CPU type.
• Operating System — The host’s operating system.

LOC

Location Record — This record specifies a domain name’s geographical location. You can set the following values:

• Latitude — The location’s latitude, in Degrees Minutes Seconds (DMS) format.
• Longitude — The location’s longitude, in Degrees Minutes Seconds (DMS) format.
• Altitude — The location’s altitude, in meters.
• Size — The diameter of a sphere that encloses the entire location, in meters,
• Horizontal — The location’s horizontal precision, in meters.
• Vertical — The location’s vertical precision, in meters.

MX

Mail Exchanger — This record identifies the servers that handle a domain’s email. Changes that you make to this record control where the server delivers a domain’s email. You can set the following values:

• Priority — Identifies the servers that handle a domain’s email. This value for each MX record determines the order in which other mail servers will use the domain’s mail server. A lower value indicates a higher priority level. A value of 0 indicates the highest priority level.
• Destination — The mail server. This must be a fully qualified domain name (FQDN).

NAPTR

Naming Authority Pointer — This record specifies a regular-expression-based rewriting rule. This creates a domain label to use with lookup services that aren’t in domain name syntax. You can set the following values:

• Order — A 16-bit unsigned integer that specifies the order that the NAPTR records process. Low numbers process before high numbers.
• Preference — A 16-bit unsigned integer. This value sets the order in which two or more records with identical Order values process. Low numbers process before high numbers.
• Flags — A flag that controls how NAPTR uses the query output. You can use one of the following flags: S, A, U, or