Wildcard support makes it possible to allow or deny access to specific subdomains while still allowing access to other subdomains or the parent domain.
Subdomains can be listed in the the Allow and Block. A block list entry for
subdomain.parentdomain.com will block the subdomain but allow access to the parent domain.
As an example: a wildcard entry for
sw*.apple.com will match all the domains (swcdn.apple.com, swdownload.apple.com, swquery.apple.com, swscan.apple.com) used by Apple products for software updates.
The wildcard character is the * (asterisk). The * character is supported anywhere in a Block or Allow list entry, including the beginning or end of an entry. The following are all valid list entries:
*test.com *.test.com beacon*.test.com sub.test.*