Anti-DDoS Advanced supports CC frequency limiting for connected web businesses to restrict the access frequency of source IPs. CC frequency limiting provides multiple protection levels and is set to Loose by default. You can customize a frequency limiting rule to apply CAPTCHA and discard on source IPs if any IP accesses a certain page too frequently in a short time.
You can adjust your frequency limiting rules using the following protection levels based on the real-time traffic:
Level
Description
Loose
At this level, there may be a risk that a small number of abnormal requests can bypass the rule.
Note that you can change the protection level when attacks occur or configure custom CC frequency limiting rules for protection.
Medium
This level verifies the identity of visitors using CAPTCHA. Only requests from verified visitors are forwarded to the real server.
Note that this level is only applicable to website businesses. For API- or app-based businesses, please configure custom CC frequency limiting rules instead of using the default configurations.
Urgent: When requests to access the real server surge and cause a high load or abnormal response, you can select this level.
Strict
This level verifies the identity of visitors using CAPTCHA. It may lead to false positives due to stricter verification.
Note that this level is only applicable to website businesses. For API- or app-based businesses, please configure custom CC frequency limiting rules instead of using the default configurations.
Urgent
When requests to access the real server surge and cause a high load or abnormal response, you can select this level.
Custom
This level can limit the access frequency of requests that match the configured custom rules.
Directions
1. Log in to the new Anti-DDoS console, and click CC Protection on the left sidebar.
2. Select a domain name from the left list.
3. In the CC Frequency Limit section, toggle on
, select a proper protection level as needed, and click Set to enter the rule list page.
4. Click Add Rule and enter the required fields to create a frequency limiting rule. All rules for this domain are displayed on the rule list page by default.
Note:
If no frequency limiting rules are created, the Custom level cannot be enabled.
After optimization, you don't have to add the default rule before creating a rule, and you can configure CC frequency limiting rules for subdomain names.
5. After the rule is created, it is added to the rule list. You can click Configure on the right of the rule to modify it.
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