User blacklist

The user blacklist feature is an attack prevention method that filters packets by source users in blacklist entries. Compared with IP blacklist filtering, user blacklist filtering performs access control on the user level and improves the filtering usability.

The user blacklist feature must be used together with the user identification feature. User identification provides the mappings between usernames and IP addresses for the user blacklist. For more information about user identification, see "Configuring user identification."