This article explains how to add a filter without conditions. Typically, a filter without any conditions matches all records.
To create a new filter:
Go to Configuration > Filters. In the Administration application, go to Users > Filters.
Expand the Filter groups to select a specific group to which you want to add the filter.
Click New. The New Filter dialog appears.
Enter a Name and Description.
Select the filter type, then click OK.
The filter is available for assignment.