Zscaler Shift allows the creation of custom categories for use in policies.
No matter what content filter type you choose or which security features you enable for a given policy, there may be some domains that you want to whitelist and always allow for users and other domains that you want to blacklist and always block for users. Custom categories enable you to do this.
To whitelist or blacklist domains while configuring policies, you must first create a custom category and then add the domains you want to whitelist or blacklist to the custom category. The custom categories you create will then appear as options you can select when you configure the Always Allow Categories or Always Block Categories in policies.
Since it is a DNS service, Shift only resolves domain names.
To create a custom category:
You must first save the category before adding any domains.