In LoadMaster firmware version 7.2.53, a new Additional Records section was added to allow you to configure records for a specific FQDN. You can add, modify, or delete a additional TXT, CNAME, and MX records to an FQDN. These record types allow you to communicate domain resources to clients:

TXT: A TXT (text) record is essentially unformatted data that can be used for almost any purpose, but typically contains information to be consumed by clients to classify a domain in some way, provide details about a domain, or specify resources available within a domain.

CNAME: A CNAME record points a DNS name (such as www.example.com) to another DNS name (such as lb.example.com). This is typically used to define a website alias.

If you select CNAME from the Type drop-down list, the NAME and RDATA fields become available. By default, the RDATA field is set with the FQDN name unless some other value is entered in the field. You can add an FQDN that is unrelated to the FQDN to which the records are being added, if desired.

MX: A mail exchanger (MX) record specifies the mail server responsible for accepting email messages on behalf of a domain name.

Note: Underscores are supported in the Data field for each of the record types.

The following limits per GEO record and global limits are in place:

  • There is a limit of 127 characters in the Data field.

  • There is a limit of 64 records of any type per FQDN.

The following validation is in place for CNAME records:

  • There cannot be duplicates.

  • CNAMEs you add must be part of the domain (must be a child of the FQDN and not the same as the FQDN).

  • CNAMEs must be a domain name (no IP addresses).

  • FQDNs cannot be added if it already exists as a CNAME.

  • Zones cannot be added if it already exists as a CNAME.

  • A CNAME cannot be added if an FQDN with the same name already exists.

  • A CNAME cannot be added if a Zone with the same name already exists.

For the MX record, there is also a priority. Valid values for the priority field range from 0 to 65535.

The following are not supported as of firmware version 7.2.53:

  • Multiple strings within the record: Some DNS providers allow you to put multiple strings in one entry using quotes, for example, "string 1" "string 2" "string 3". Progress Kemp does not allow this as of firmware version 7.2.53, so you can only have "string 1", for example.

  • Non-ASCII characters

  • Backslashes (\)

  • Duplicate records are allowed.

The Time To Live (TTL) value is taken from either the global setting (in Global Balancing > Miscellaneous Params) or the local setting in the FQDN (if the Enable Local Settings check box is selected).