Configuring a data set
To configure a data set, you must specify the strings that server as a pattern, assign a type (number, IPv4 address, or IPv6 address) and configure the dataset range. You can manually assign a unique index value to the pattern, or you can allow the index values to be assigned automatically. Dataset is not related to HTTP or any 7 layer protocol. It works only on text or string. There are different types of dataset such as NUM, ULONG, IPv4, IPv6, MAC, DOUBLE. You can select a type and define the dataset range based on the specified type.
Note:
Policy data sets are case sensitive (unless you specify the expression to ignore case). Therefore, the MAC address ff:ff:ff:ff:ff:ff for example, is not the same as the MAC address FF:FF:FF:FF:FF:FF.
The rules applied for index values of data sets are similar to pattern sets. For information about index values, seeConfiguring a Pattern Set.
To configure a data set
You must complete the following steps to configure a data set:
- Add a policy dataset
- Bind pattern to a policy dataset
- Add a policy expression
- Verify the policy configuration
Add a policy dataset
At the command prompt, do the following:
add policy dataset
Example:
add policy dataset ds1 ipv4 -comment numbers
Bind a pattern to the data set
At the command prompt, type:
bind policy dataset
Example:
bind policy dataset ds1 1.1.1.1 -endRange 1.1.1.10 -comment short description about the pattern bound to the data set
Note:
你必须重复这个步骤的所有模式want to bind to the data set. You can bind only up to 5000 patterns to a dataset.
And, a dataset range must not overlap with other ranges bound to a dataset and cannot include single values bound to the dataset. If you bind a dataset with an overlapping range results in an error.
Example:
add policy dataset ip_set ipv4 Done bind policy dataset ip_set 2.2.2.25 Done bind policy dataset ip_set 2.2.2.20 -endRange 2.2.2.30 ERROR: The range overlaps an existing range or includes a value bound to the dataset.
A value is considered to be in the dataset if it is either equal to a single value bound to the data set or is between the lower-value and upper-value (lower-value <= value && value <- upper-value), for a range bound to the data set.
Use policy expression in a policy data set
At the command prompt, type:
add policy expression exp1 http.req.body(100).contains_any("ds1")
Where, The expression checks whether there is any pattern (or pattern within the range) bound to the dataset ds1 is present in the first 100 bytes of the HTTP request body.
Verify dataset configuration
At the command prompt, type:
show policy dataset ds1
> show policy dataset ds1
Example:
Dataset: ds1 Type: IPV4 1) Bound Dataset Range from: 1.1.1.1 through: 1.1.1.10 Index: 1
To configure a data set by using the configuration utility
Follow the steps given below to configure a policy dataset:
- Navigate toAppExpert > Data Sets.
- In the details pane, under Data Sets, clickAdd.
In theConfigure Data Setpage, set the following parameters.
- Name. Name of the policy data set.
- Type. Type of value to bind to the dataset.
- ClickInsertto bind the dataset value of specific type.
- Value. Value of the specified type associated with the dataset.
- Index. The index value of the dataset.
- End range. The dataset entry. This is a range
to
. - Comments. A short description about the data set.
- ClickInsertandClose.
- Enter comments.
- ClickCreateandClose.