Allowing Internet Traffic Only to a Specified Port
Application Scenarios
For security purposes, you need to allow traffic only from certain ports (such as ports 80 and 443) to access cloud resources.
This section describes how to configure CFW for refined management and control on cloud resources, allowing all EIPs to access port 80 of an EIP (xx.xx.xx.1).
Procedure
- Purchase the CFW standard or professional edition. For details, see Purchasing CFW.
- In the navigation pane on the left, click and choose . The Dashboard page will be displayed.
- (Optional) If the current account has only one firewall instance, the firewall details page is displayed. If there are multiple firewall instances, click View in the Operation column of a firewall to go to its details page.
- Enable protection for the EIP (xx.xx.xx.1).
- In the navigation pane, choose . The EIPs page is displayed. The EIP information is automatically updated to the list.
- In the row of the EIP (xx.xx.xx.1), click in the Operation column.
- Configure protection rules.
- In the navigation pane, choose .
- Click Add Rule. On the Add Rule page, configure protection information and set other parameters as needed.
Configure the following protection rules:
- One of the rule blocks all traffic, as shown in Figure 1. The priority is the lowest.
- Direction: Inbound
- Source: Any
- Destination: Any
- Service: Any
- Application: Any
- Action: Block
- The other rule allows the traffic to port 80 of the EIP (xx.xx.xx.1), as shown in Figure 2. The priority is the highest.
- Direction: Inbound
- Source: Any
- Destination: Select IP address and enter xx.xx.xx.1.
- Service: TCP/1-65535/80
- Application: Any
- Action: Allow
- One of the rule blocks all traffic, as shown in Figure 1. The priority is the lowest.
- View the rule hits in access control logs.
In the navigation pane, choose Log Audit > Log Query. Click the Access Control Logs tab.
In the rows where Destination IP is xx.xx.xx.1, the corresponding Action is Block.
References
For details about how to add other protection rules, see the parameter description in Adding a Protection Rule.
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