Question

What role does a Firewall play in an organization. What are the parameters that can be utilized with Access Control Lists?

Answer 1

Role played by Firewall in an organization :-
* it provides a barrier to control network traffic both into and out of an organization’s Internet-connected network, or perhaps between different segments of an internal network.
* Its purpose is to control what traffic is allowed to traverse from external side to internal side and vice versa.
* firewalls can block traffic intended for particular IP addresses or server ports.
* Firewalls also provide protection against threats including denial of service (DOS) attacks. DOS attacks occur when an intruder tries to barrage a corporate web site with a flood of traffic, so much so that it brings the web server down and, potentially, allows the intruder to break into it. From there, the intruder may be able to access other network resources.
* More complex firewalls support “stateful inspection” techniques, where the firewall looks at patterns in traffic flows to identify anomalies that suggest some form of attack is underway, such as DOS attacks or spoof attacks, where an intruder tries to masquerade as a trusted resource.

Parameters that can be utilized with Access Control Lists :-
* Blocking specified traffic so as to enhance the performance of the network.
* Provide security by blocking packets destined to sensitive areas in your network.
* Determining the type of traffic to forward based on the protocols.
* Denying certain users access to the internet while allowing others.