On a BIG-IP® system without a URL database, if you want to control traffic
based on the type of URL being requested, and you have many URLs to consider, you should
configure user-defined URL categories and user-defined URL filters. This approach provides good
performance, ease-of-use, and the ability to use the URL Category and the
URL Filter Assign agents in a per-request policy.
If you have only a few URLs that you want to treat differently, you can probably skip creating
user-defined URL categories and filters and use a simple URL Branching
agent in a per-request policy. In this case, you specify the URLs that you want to match directly
in the URL Branching agent.
To configure user-defined
URL categories and URL filters, complete these
Configuring user-defined URL
You configure a URL filter to
specify how to process requests for content in URL categories: allow, block, or confirm
access. You can configure multiple URL filters.
On the Main tab, click
You can click the name of any filter to view its settings.
The URL Filters screen displays.
To configure a new URL filter, click one of these options.
Create button: Click to start with a URL filter
that allows all categories.
Copy link: Click for an existing URL filter in
the table to start with its settings.
In the Name field, type a unique name for the URL
The screen redisplays. An Associated Categories table displays. It
includes each URL category and the filtering action that is currently assigned
to it. The table includes a Sub-Category column. Any URL categories that were
added by administrators are subcategories within Custom
To specify that you want to block access to particular categories or
subcategories, select them and click Block.
Important: When you
select a category, you also select the related subcategories. You can expand
the category and clear any subcategory selections.
To specify that you want to allow access to particular categories or
subcategories, select them and click Allow.
To specify that you want the user to confirm access for particular categories
or subcategories, select them and click Confirm.
To use a URL filter, you must
include a URL Filter item in a per-request policy. A per-request policy runs each time a
user makes a URL request.