Configuring a Known Attack Source Rule to Block Specific Visitors for a Specified Duration

If WAF blocks a malicious request by IP address, Cookie, or Params, you can configure a known attack source rule to let WAF automatically block all requests from the attack source for a blocking duration set in the known attack source rule. For example, if a blocked malicious request originates from an IP address and you set the blocking duration to 500 seconds, WAF will block the IP address for 500 seconds after the known attack source rule takes effect.

Known attack source rules can be used by basic web protection, precise protection, IP address blacklist, and IP address whitelist rules. You can use known attack source rules in basic web protection, precise protection, and IP blacklist or whitelist rules as long as you set Protective Action to Block for these rules.

Prerequisites

You have added your website to a policy.

Constraints

For a known attack source rule to take effect, it must be enabled when you configure basic web protection, precise protection, blacklist, or whitelist protection rules.
It takes several minutes for a new rule to take effect. After the rule takes effect, protection events triggered by the rule will be displayed on the Events page.
Before adding a known attack source rule for malicious requests blocked by Cookie or Params, a traffic identifier must be configured for the corresponding domain name. For more details, see Configuring a Traffic Identifier for a Known Attack Source.

Specification Limitations

You can configure up to six blocking types. Each type can have one known attack source rule configured.
The maximum time an IP address can be blocked for is 30 minutes.

Procedure

Log in to the management console.
Click in the upper left corner of the management console and select a region or project.
Click in the upper left corner and choose Web Application Firewall under Security & Compliance.
In the navigation pane on the left, choose Policies.
Click the name of the target policy to go to the protection configuration page.
In the Known Attack Source configuration area, change Status if needed and click Customize Rule to go to the Known Attack Source page.

Figure 1 Known Attack Source configuration
In the upper left corner above the known attack source rules, click Add Known Attack Source Rule.

In the displayed dialog box, specify the parameters by referring to Table 1.

Figure 2 Add Known Attack Source Rule

**Table 1** Known attack source parameters
Parameter	Description	Example Value
Blocking Type	Specifies the blocking type. The options are: Long-term IP address blocking Short-term IP address blocking Long-term Cookie blocking Short-term Cookie blocking Long-term Params blocking Short-term Params blocking	Long-term IP address blocking
Blocking Duration (s)	The blocking duration must be an integer and range from: (300, 1800] for long-term blocking (0, 300] for short-term blocking	500
Rule Description	A brief description of the rule. This parameter is optional.	None

Click Confirm. You can then view the added known attack source rule in the list.

Related Operations

To modify a rule, click Modify in row containing the rule.
To delete a rule, click Delete in the row containing the rule.

Configuration Example - Blocking Known Attack Source Identified by Cookie

Assume that domain name www.example.com has been connected to WAF and a visitor has sent one or more malicious requests through IP address XXX.XXX.248.195. You want to block access requests from this IP address and whose cookie is jsessionid for 10 minutes. Refer to the following steps to configure a rule and verify its effect.

On the Website Settings page, click www.example.com to go to its basic information page.
In the Traffic Identifier area, configure the cookie in the Session Tag field.

Figure 3 Traffic Identifier
Add a known attack source, select Long-term Cookie blocking for Blocking Type, and set block duration to 600 seconds.

Figure 4 Adding a Cookie-based known attack source rule
Enable the known attack source protection.

Figure 5 Known Attack Source configuration
Add a blacklist and whitelist rule to block XXX.XXX.248.195. Select Long-term Cookie blocking for Known Attack Source.

Figure 6 Specifying a known attack source rule
Clear the browser cache and access http://www.example.com.

When a request from IP address XXX.XXX.248.195, WAF blocks the access. When WAF detects that the cookie of the access request from the IP address is jsessionid, WAF blocks the access request for 10 minutes.

Figure 7 Block page
Go to the WAF console. In the navigation pane on the left, choose Events. View the event on the Events page.