RegEx Pattern for FQDN Address Object

Symptom

There is a limitation in creating an address object under Objects > Addresses and click Add.

As shown below, after entering a parameter, 'OK' is greyed out:

Cause

Wildcards or regex patterns cannot be used to form a valid FQDN

The validation of FQDN object is performed using RegEx pattern ^([a-zA-Z0-9._-])+$ by the system to determine if a given hostname uses valid characters.

Where ^ specifies start of a string, and $ specifies end of a string and + indicates one or more strings in the Round Brackets.

[a-zA-Z0-9._-] indicates any character specified in the Square Brackets, which does not include any other special characters other than  '.' , '_' , '-' .

owner: hyadavalli