Security threats have increased over the past 25 years as the popularity of the internet has grown. As cyber threats become more prevalent, network administrators work hard to develop lasting solutions to the problem of unwanted instructions by unknown networks. The problem is that as newer security systems are put into place, the cyber attackers become more adept at pushing through the walls and devising new methods of intrusion into systems. Access Control Lists is an advanced internet security devise that can help by presenting a list of conditions and protocols for the traffic moving through the router. The ACL can help you avoid unauthorized access to your network.


Businesses can use ACLs to tell routers what type of packets to allow, and that will control different traffic moving in and out of your system. ACLs can also be configured to network protocols for different security settings such as extended, complex, and standard. The control uses the TCP port and is part of the internet security solution.


The way the lists work is to limit or guard what information leaves or enters the network. If it is on the list, it can be accessed, otherwise it is prohibited; in other words, it is a filter that guards your information by reading the packet header and only allowing what you defined as permissible.


As the ACL extracts the information from the headers, it compares the data against the parameters you have set, and then denies access or permits access accordingly. The ACL can also help you control the system operating resources because only the permitted users can access information, all spyware and adware can be avoided with great success.

For ease of operation, and to track all organization networks, the ACL can help you. The threats your network faces every day don’t have to bring you down. Access Control Lists play an essential part of modern network systems.