GUI - Category
On NxFilter, there are system categories and custom categories.
Category > System
Predefined categories by your domain categorization option. Jahaslist has 56 categories and Cloudlist has 69, Globlist has 3 categories.
You still can add domains into these system categories. To find out more about these system category options, read
Domain categorization
You can download and merge the blocklists from the internet into Jahaslist and Globlist on 'Classifier > Blocklist'.
Category > Custom
You can create unlimited number of custom categories and add up to 300,000 domains into your custom categories.
Category > Domain Test
This is for finding out which category a domain falls into.