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Each Global Filter List consists of:
- Match conditions: Definitions of possible characteristics that a request can match (e.g., a list of IP addresses that it might originate from), plus one or more logical operators to use when evaluating the match.
- One or more Tags to assign when a match occurs.
- An Action to apply to the request.
For each incoming request, Curiefense will evaluate all active Global Filter Lists. A single request will receive Tags from all Lists which match it.
The default Action for a Global Filters List is Tag Only. This means that the specified tag(s) will be applied, and the traffic evaluation process will continue.
A related Action is Header. The specified tag(s) will be applied, and the specified header will be added. Then the traffic evaluation process will continue.
Sometimes the Match Conditions describe a request which should be rejected immediately; if so, there is no need for the complete evaluation process to occur. In this situation, one of the other Actions can be set here, and it will be applied immediately whenever a request meets the Match Conditions.
Global Filter Lists can be either Internet-sourced or self-managed.
- Internet-sourced Lists are based upon online sources (e.g., Spamhaus DROP lists). To use an Internet-sourced list, enter its URL into the Source field. For example, to create a list based on the Spamhaus ASN DROP list, you would enter https://www.spamhaus.org/drop/asndrop.txt and select the update now control that will appear. Curiefense will then populate the list automatically.
- Self-managed Lists are created manually. The Source field entry will be
Note that Internet-sourced lists are not editable within the interface, because they are obtained automatically; Curiefense updates them every 24 hours (or you can force an immediate update by selecting update now). Typically, these will be Single-Section Lists.
Match conditions are lists of criteria and the logical operators (AND or OR) to use when evaluating them.
Match conditions are combined into sections. An additional logical operator defines the relationship between each section.
Many Global Filters Lists will have only section. Here's an example.
In the example, the Sections relation toggle is set to
AND. For a single-section list, this toggle is ignored.
Within each section, there is an additional logical operator, shown at the beginning of each list entry after the first. This is used when evaluating the criteria within the list:
ORmeans the Tags will be attached to, and the Action taken for, each request that matches any of the entries in the list.
ANDmeans the Tags will only be attached to, and the Action taken for, requests that match all of the entries in the list.
This operator can be toggled by selecting it.
To add a match condition, select the add control ("+") at the bottom of the list. The following dialog will appear.
For most of the categories (IP Address, Method, etc.), the dialog will appear as it is above. Individual entries can be added by entering their value into the first text box, and an annotation (a label for display within the Curiefense interface) in the second text box, then selecting the Add control.
Multiple entries can be made at once, with each entry on a separate line. Each line contains the value, plus a pound sign (#) followed by the annotation. Example:
Selecting the Add control would then produce the following:
For some categories, one entry can be made at a time, with no annotations.
Once created, these entries cannot be edited. If one needs to be modified, remove it and re-create it.
Here are some sample entries for the various categories. Notice that boolean operators are available.
Entries for Country matches must contain ISO 3166 2-letter country codes (ex. "us").
Match criteria are case-insensitive.
Match conditions can be combined into multiple sections. To add a section to an existing Global Filters List, select Create new section.
Here's an example:
Each additional section works the same as the initial section. However, a multiple-section list also includes a logical operator for the relationship between the individual sections. It is shown between the sections, and can be changed by toggling the Sections Relation control on the left.
In the example above, this is
AND. Therefore, a request will receive the tag of
internalif it matches any of the IPs in the first section,
ANDit also contains one of the HTTP methods specified in the second section.