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How Do I Use a Dedicated WAF Instance to Protect Non-Standard Ports That Are Not Supported by the Dedicated Instance?
To use a dedicated WAF instance to protect a non-standard port that is not supported by dedicated instance, configure an ELB load balancer to distribute traffic to any non-standard port that is supported by the dedicated instance. For supported non-standard ports, see Which Non-Standard Ports Does WAF Support?
For example, a client sends requests over HTTP to the dedicated WAF instance, and you protect the website whose domain name is www.example.com:1234. The dedicated instance cannot protect non-standard port 1234. In this case, you can configure a load balancer to distribute traffic to any other non-standard port (for example, port 81) that can be protected by the dedicated instance. In this way, traffic designated to non-standard port 1234 will be checked by WAF.
To ensure that the configuration takes effect, a wildcard domain name corresponding to the protected domain name is recommended for the Domain Name field. For example, if you want to protect www.example.com:1234, set Domain Name to *.example.com.
Perform the following steps:
- Log in to the management console.
- Add the domain name of the website you want to protect on the WAF console.
- Click in the upper left corner and choose Web Application Firewall (Dedicated) under Security.
- In the navigation pane on the left, choose Website Settings.
- In the upper left corner of the website list, click Add Website. On the displayed page, select Dedicated mode, enter the wildcard domain name *.example.com corresponding to www.example.com:1234 in the Domain Name text box, and select a port (for example, 81) from the Protected Port drop-down list.
- Select Yes for Proxy Configured and click Confirm.
- Close the dialog box displayed.
You can view the added websites in the protected website list.
- Configure a load balancer on the ELB console.
- Click in the upper left corner of the page and choose Elastic Load Balance under Network to go to the Load Balancers page.
- Click the name of the load balancer you want in the Name column to go to the Basic Information page.
- Locate the IP as a Backend row, enable the function. In the displayed dialog box, click OK.
- Select the Listeners tab, click Add Listener, and configure the listener port to 1234.
- Click Next: Configure Request Routing Policy.
- Click Next: Add Backend Server. Then, select the IP as Backend Servers tab.
- Click Add IP as Backend Server. In the displayed dialog box, configure Backend Server IP Address and Backend Port.
- Backend Server IP Address: Enter the IP address of the dedicated WAF engine, which you can obtain from the dedicated engine list.
- Backend Port: 81, which is the same as the port you configured in 2.c.
- Click OK.
- Click Next: Confirm, confirm the information, and click Submit.
- Unbind an elastic IP address (EIP) from the origin server and bind the EIP to the load balancer configured for the dedicated WAF instance.
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