Blocking Traffic to a Specified Port

Enabling Port Blocking

1. Log in to the management console.
2. Select a region in the upper part of the page, click in the upper left corner of the page, and choose Security & Compliance > Anti-DDoS Service. The Anti-DDoS Service Center page is displayed.
3. In the navigation pane on the left, choose Cloud Native Anti-DDoS Advanced > Protection Policies. The Protection Policies page is displayed.
4. Click Create Protection Policy.
5. In the displayed dialog box, set the policy name, select an instance, and click OK.
   Figure 1 Creating a policy
   

6. In the row containing the target policy, click Set Protection Policy in the Operation column.
7. In the Port Blocking configuration area, click Set.
   Figure 2 Port blocking configuration box
   

8. In the Port Blocking dialog box, click Create Port ACL Rule.
9. In the dialog box that is displayed, set the port ACL.
   Figure 3 Creating a port ACL rule
   

   Table 1 Port ACL parameters

   Parameter	Description
   Rule Name	Enter a rule name.
   Protocol	Protocol of the port to be blocked TCP and UDP are supported.
   Port Type	Only Destination Port is supported.
   Start Port-End Port	Set the range of ports to be blocked.
   Action	Protection action after the port is blocked Discard: Discard traffic destined for the port.

10. Click OK.

Follow-up Procedure

• Locate the row that contains the target port and click Delete in the Operation column to delete the port blocking rule.
• Locate the row that contains the target port and click Edit in the Operation column to edit the port blocking rule.