Access Control Policy Overview

After protection is enabled, CFW access control policies allow all traffic by default. Proper access control policies help you implement refined management and control on traffic between internal servers and the Internet, prevent internal threats from spreading, and enhance in-depth security.

Access Control Policy Types

Access control policies are classified into protection rules and blacklist/whitelist. Differences between protection rules and blacklist/whitelist shows more details. If traffic hits a policy, the action of the policy will be taken.

**Table 1** Differences between protection rules and blacklist/whitelist
Type	Protected Object	Network Type	Action	Configuration Method
Protection rules	5-tuple IP address groups Geographical locations Domain names and domain name groups	EIP Private IP address	If Block is selected, traffic will be blocked. If Allow is selected, traffic will be allowed by protection rules and then checked by the intrusion prevention system (IPS).	Adding Protection Rules to Block or Allow Traffic
Blacklist	5-tuple IP address groups		Traffic is blocked directly.	Adding Blacklist or Whitelist Items to Block or Allow Traffic
Whitelist	5-tuple IP address groups		Traffic is allowed by CFW and not checked by other functions.

Specification Limitations

To enable VPC border protection and NAT protection, use the CFW professional edition and enable VPC firewall protection.

Precautions for Configuring a Blocking Policy

The precautions for configuring a protection rule or a blacklist item for blocking IP addresses are as follows:

You are advised to preferentially configure specific IP addresses (for example, 192.168.10.5) to reduce network segment configurations and avoid improper blocking.
Exercise caution when configuring protection rules to block reverse proxy IP addresses, such as the WAF back-to-source IP addresses. You are advised to configure protection rules or whitelist to permit reverse proxy IP addresses.
Blocking forward proxy IP addresses (such as company egress IP addresses) can have a large impact. Exercise caution when configuring protection rules to block forward proxy IP addresses.
When configuring region protection, take possible EIP changes into consideration.

Wildcard Rule

Parameter	Input	Description
Source/Destination	0.0.0.0/0	All IP addresses
Domain name	www.example.com	Domain name www.example.com
Domain name	*.example.com	All domain names ending with example.com, for example, test.example.com
Service - Source port or destination port	1-65535	All ports
Service - Source port or destination port	80-443	All ports in the range 80 to 443
Service - Source port or destination port	80 443	Ports 80 and 443

References

For details about how to add a single rule to protect traffic, see Adding Protection Rules to Block or Allow Traffic. For details about how to add a single blacklist or whitelist item to protect traffic, see Adding Blacklist or Whitelist Items to Block or Allow Traffic.
For details about how to add protection policies in batches, see Importing and Exporting Protection Policies.
Follow-up operations after adding a policy:
- Policy hits: For details about the protection overview, see Viewing Protection Information Using the Policy Assistant. For details about logs, see Access Control Logs.
- For details about the traffic trend and statistics, see Viewing Traffic Statistics. For details about traffic records, see Traffic Logs.