The easiest way to check if your Huawei device is blacklisted is to visit Huawei's official website and use their verification tool. After a cpu-defend blacklist is configured, the switch discards the packets sent from the blacklisted users. Run the display cpu-defend policy command to check the policy name applied globally or to a specified slot, the display cpu-defend policy policy-name command to check whether a blacklist is. On a WLAN, blacklist or whitelist can be configured to filter access from STAs based on specified rules. The blacklist or whitelist allows authorized STAs to connect to the WLAN and rejects access from unauthorized STAs. (Optional) Switch to another firewall instance. This document describes the configurations of Security, including ACL, reflective ACL, local attack defense, MFF, attack defense, traffic suppression and storm control, ARP security, port security, DHCP snooping, ND snooping, PPPoE+, IPSG, SAVI, URPF, keychain, separating the management plane from. Check the blacklist status on your Huawei Before starting with the different verification methods, it is important to understand what it means to be blacklisted and how it can affect your Huawei device.