Acl access Control list

Access Control Lists (ACL) are lists of instructions on router and switch interfaces that control packets coming in and out of the ports. ACL applies to all routed protocols, such as IP, IPX, AppleTalk, etc.

Communication between information points and communication between internal and external networks are essential business requirements in enterprise networks. In order to ensure the security of intranet, it is necessary to ensure that unauthorized users can only access specific network resources through security policies, so as to achieve the purpose of controlling access. In short, ACL can filter traffic in the network, is a network technology means to control access.

After configuring ACL, you can restrict network traffic, allow access to specific devices, specify forwarding of packets on specific ports, and so on. For example, ACL can be configured to prohibit devices within the local area network from accessing external public networks, or only FTP services can be used. ACL can be configured either on the router or on business software that has ACL functionality.

ACL is an important technology to ensure system security in the Internet of Things. On the basis of device hardware layer security, ACL can prevent illegal devices from destroying system security and illegally obtaining system data by controlling access to communication between devices at software level and specifying access rules using programmable methods.