# Public Network Firewall

## Bind Firewall

CLB can bind a firewall to control the access of the source address.

## Procedures

1. Enter the **Traditional Load Balancer CLB page,** select the CLB instance for which you need to bind the firewall, and enter the **VServer Management page**.

2. Click on **Public Network Firewall,** to enter the public network firewall page.

3. Click on **Bind Now** and choose the firewall that you want to bind.

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4. Click on **Confirm** to complete the binding.

5. After successfully binding, the related information of the firewall will be displayed.

## Unbind Firewall

### Procedures

1. Access the CLB page, select the CLB instance for which you need to bind the firewall, and enter the **VServer Management page**.

2. Click on **Public Network Firewall,** to enter the public network firewall page.

3. Click on **Unbind Firewall**.

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4. Click on **Confirm** to complete the unbinding the firewall.

## Replace Firewall

For CLB instances that have already bound a public network firewall, it's possible to replace the firewall.

### Procedures

1. Enter the **Load Balancer CLB page,** select the CLB instance for which you need to bind the firewall, and enter the **VServer Management page**.

2. Click on **Public Network Firewall,** to enter the public network firewall page.

3. Click on **Replace Firewall** and choose the firewall that you want to re-bind.

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4. Click on **Confirm** to finish replacing the firewall.