正确地放置ACL(访问控制列表)将起到防火墙的作用。为了满足与Internet间的访问控制以及满足内部网络不同安全属性网络间的访问控制要求,在路由器上配置访问控制列表,让网络通信均通过它,以此控制网络通信及网络应用的访问权限,减低网络安全风险。 Correct placement of ACLs (Access Control Lists) will serve as a firewall. In order to satisfy the control of access to the Internet and the access control requirements of networks that satisfy different security attributes of the internal network, an access control list is configured on the router to allow network communications to pass through it to control access permissions of the network communication and network applications and reduce Network security risks.