Filter
What is a Filter?
A filter is a pre-filter function that selectively filters requests before BotManager policies are applied. Administrators can directly define conditions to selectively detect or block requests based on request attributes (IP, Header, Path, etc.).

When multiple filters exist, they are applied sequentially according to priority. If a condition is met in an upper filter, lower filters are not executed.
Relationship Between Filters and Policies
Filters operate at a stage before bot detection policies. When a request comes in, it first goes through filters, then is passed to the policy stage.
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Filters block or detect traffic, but do not classify it as bots. Bot classification is handled by policies.